Humana Inc. (HUM, NYSE)
Industry: Healthcare Plans
Annual report, fiscal year 2012



2012
Annual Report






## Humana Inc. Financial Highlights

(dollars in millions, except per common share results)

<table><tr><td></td><td>2012</td><td>2011</td><td>2010</td><td>2009</td><td>2008</td></tr><tr><td>Operating Results</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Revenues</td><td>$39,126</td><td>$36,832</td><td>$33,596</td><td>$30,743</td><td>$28,753</td></tr><tr><td>Net income</td><td>$1,222</td><td>$1,419</td><td>$1,099</td><td>$1,040</td><td>$647</td></tr><tr><td>Diluted earnings per common share</td><td>$7.47</td><td>$8.46</td><td>$6.47</td><td>$6.15</td><td>$3.83</td></tr></table>

<table><tr><td colspan="6">Financial Position</td></tr><tr><td>Total assets</td><td>$19,979</td><td>$17,708</td><td>$16,103</td><td>$14,153</td><td>$13,042</td></tr><tr><td>Total liabilities</td><td>$11,132</td><td>$9,645</td><td>$9,179</td><td>$8,377</td><td>$8,585</td></tr><tr><td>Total shareholder equity</td><td>$8,847</td><td>$8,063</td><td>$6,924</td><td>$5,776</td><td>$4,457</td></tr></table>

<table><tr><td>Cash Flow from Operations</td><td>$1,923</td><td>$2,079</td><td>$2,242</td><td>$1,422</td><td>$982</td></tr></table>

<table><tr><td colspan="6">Membership by Segment (in thousands)</td></tr><tr><td colspan="6">Retail Segment</td></tr><tr><td>Medical membership</td><td>5,434.6</td><td>4,673.9</td><td>3,542.2</td><td>3,729.4</td><td>4,764.9</td></tr><tr><td>Specialty membership</td><td>948.7</td><td>782.5</td><td>510.0</td><td>297.3</td><td>324.6</td></tr><tr><td colspan="6">Employer Group Segment</td></tr><tr><td>Medical membership</td><td>2,852.4</td><td>2,794.9</td><td>3,009.5</td><td>3,117.8</td><td>3,358.4</td></tr><tr><td>Specialty membership</td><td>7,136.2</td><td>6,532.6</td><td>6,517.5</td><td>6,761.9</td><td>6,244.1</td></tr><tr><td colspan="6">Other Businesses</td></tr><tr><td>Medical membership</td><td>3,801.8</td><td>3,715.8</td><td>3,734.9</td><td>3,486.8</td><td>3,488.9</td></tr><tr><td colspan="6">Consolidated</td></tr><tr><td>Medical membership</td><td>12,088.8</td><td>11,184.6</td><td>10,286.6</td><td>10,334.0</td><td>11,612.2</td></tr><tr><td>Specialty membership</td><td>8,084.9</td><td>7,315.1</td><td>7,027.5</td><td>7,059.2</td><td>6,568.7</td></tr></table>




Michael McCallister, Chairman of the Board and Bruce Broussard, President and Chief Executive Officer

## To our
stockholders

Headquartered in Louisville, Kentucky, Humana is a leading health care company that offers a wide range of health and wellness products and services that incorporate an integrated, holistic approach to lifelong well-being for our 12 million medical and 8 million specialty health plan members nationwide.

Humana completed a successful 2012 by enhancing the development of our integrated care delivery model, which we believe represents the future of health care delivery; by continuing to fulfill our dream of helping people achieve lifelong well-being; and by making the preparations necessary to ensure Humana’s long-term sustainability in light of health reform’s next major implementation phase beginning in 2014. At the same time, we celebrated the achievements of Michael B. McCallister, who retired as Chief Executive Officer on December 31 after a 13-year tenure marked by extraordinary company growth. On January 1 Bruce D. Broussard, who has served since 2011 as Humana’s President, became President and Chief Executive Officer after the successful completion of the long-term transition plan outlined by our Board of Directors.




# 2012 in review

For 2012, consolidated revenues increased 6 percent, to $39.13 billion, from $36.83 billion in 2011. Medical membership of 12,088,800 rose 904,200, or 8 percent, over the December 31, 2011 membership of 11,184,600. Individual Medicare Advantage and stand-alone Prescription Drug Plan (PDP) membership each grew by 18 percent during 2012, with individual Medicare Advantage and stand-alone PDP membership approximating 1,927,600 and 2,985,600, respectively, at December 31, 2012. Membership in Humana’s specialty products, including dental, vision, and other supplemental benefit plans, saw an 11 percent increase, rising to 8,084,900 at December 31, 2012 from 7,315,100 a year earlier. Diluted earnings per common share of $7.47 for the year ended December 31, 2012 resulted in a three-year compounded annual growth rate of approximately 7 percent.

Humana’s 2012 results reflect the continued implementation of the company’s strategy – offering our health plan members quality, affordable care combined with a positive consumer experience in growing markets. The strategy’s engine is our integrated care delivery model, which is designed to seamlessly unite quality care and high member engagement, enabled by sophisticated data analytics. Our model puts the primary care provider at the center, providing and coordinating care that is consistent, integrated, cost-effective and member-focused. Through aligned incentives and real-time actionable information, the model is designed to improve health outcomes and affordability for individuals and for the health system as a whole, while offering Humana members a simple, seamless health care experience.





Diluted Earnings per Common Share



Putting the primary care provider at the center of our integrated care delivery model provides coordinated care that is consistent, cost-effective and member-focused.



# 2012 Milestones

## Through its strategy,
the company achieved
several notable
milestones in 2012.

First, we saw significant progress in our Medicare Advantage Star quality ratings. Sponsored by the Centers for Medicare and Medicaid Services (CMS), these ratings are based on CMS’ analysis of comprehensive quantitative and qualitative data relative to plan members’ health outcomes, their experience with the service provided by contracting plans, and their overall satisfaction and sense of well-being. Highlights of our 2012 Stars progress were:

1. For bonus year 2014, our average Star rating increased from 3.28 to 3.82.

2. The contract that includes the majority of our Florida membership earned 4.5 Stars.

3. Humana’s Wisconsin plan became the first and only plan offered by a publicly traded organization that has achieved a five-Star rating.
4. Most significant of all, the percentage of our members in plans rated four Stars or above increased to 40 percent. Apart from the high quality of care and member plan experience signified by such a rating, CMS is increasingly linking Star ratings to payment levels as its emphasis on pay-for-performance grows.



Our second 2012 milestone was the major expansion of our HMO offerings. We believe HMOs allow our integrated care delivery model to work more effectively for our members than any other plan option. The percentage of individual Medicare Advantage members who chose to enroll in an HMO reached 48 percent during the 2013 Annual Election Period for Medicare beneficiaries in late 2012 and is expected to continue to rise through the remainder of this



BY = Bonus Year



Percentage of individual Medicare Advantage Members in an HMO

48%

The highest total since the implementation of the Medicare Modernization Act in 2006.

year. We anticipate the full year will show new HMO enrollment of more than 50 percent – the highest total since the implementation of the Medicare Modernization Act in 2006.

Our third milestone was our successful bids for Medicaid business in Ohio, Illinois and Kentucky. These bids include individuals dually eligible for Medicare and Medicaid in both Ohio and Illinois. Our alliance with CareSource \( ^{®} \) , established in 2012, was a key factor in our Ohio success. As the implementation of the Affordable Care Act (ACA) continues, we expect to selectively pursue Medicaid and dual-eligible opportunities in geographies that make strategic sense for us.



Fourth, we furthered the build-out of our integrated care delivery model through our acquisitions of Metropolitan Health Networks, Inc., a medical services organization (MSO), and Certify Data Systems, as well as through strategic investments in two other MSOs, MCCIT \( ^{™} \)  and JenCare. These organizations, combined with our own CAC medical centers and the 50 primary care providers acquired by Concentra \( ^{®} \)  during 2012, form a significant part of the foundation upon which we will build a comprehensive, best-practices integrated care delivery model. This member-focused model has three mutually reinforcing elements: care delivery, coordinated by the primary care physician; high member engagement; and clinical and consumer insights deriving from data-driven information shared among Humana, our providers and our members. The model integrates primary care, home care services, pharmacy services, well-being (including innovative incentives and rewards programs), and data analytics. For our providers, interest in migrating toward a payment model based on quality and cost, in which integrated care is delivered most efficiently and effectively, continues to be strong, and the number of providers migrating to such a model is large. With the addition of our 2012 physician-related transactions, Humana

now employs, has strategic investments in, or has MSO contracts with nearly 2,500 providers nationwide.

To help give these providers the tools they need to offer our members optimal care, we acquired Certify, a pioneer in health information exchange technology. Certify’s HealthLogix \( ^{™} \)  solution provides two-way sharing of relevant clinical information across disparate electronic health records systems, connecting providers and allowing them to share patient health information in real time. This functionality combines with electronic communication and analytics from our existing Anvita \( ^{™} \)  and CareHub infrastructure to proactively identify gaps in care – enhancing care coordination with our owned, affiliated, and contracted providers.

And finally, we increased our team of care management professionals to 6,700 from 3,800 at the end of 2011. Among other benefits, this enabled us to exceed by 5,000 our goal of 55,000 in-home Medicare Advantage member health assessments for 2012. Through swift and accurate assessment of our members' health conditions, and by guiding them to the appropriate care pathways, we believe we are able to improve their health status, enhance their quality of life, enable aging with grace in their homes, and reduce the incidence and cost of institutional health care, thus improving their health care experience.



Our capital deployment initiatives in 2012 included the issuance of $1 billion in senior notes. During the year we also repurchased 6.25 million shares of Humana stock in open-market transactions for $460 million, and declared cash dividends to stockholders of $1.03 per share for an aggregate amount of $166 million.



Humana's
Integrated Care
Delivery Model

A member-focused model leveraging three core elements to reinforce value for our providers and members.




As we plan and execute the next phase of our strategic development, we have identified eight priorities that will drive our efforts in 2013 and beyond.

These priorities are interrelated – success in one will support success in another. Besides further preparing us for 2014, we believe they will position us well for years to come, regardless of any government agenda. They are:

## 1. Grow our Medicare

membership – Our Medicare value proposition is compelling; through our integrated care delivery model, we believe it offers lower costs (through our 15 Percent Solution \( ^{*} \) ), better quality and better health outcomes than original Medicare. It also dovetails perfectly with demographic factors that are favorable to further Medicare membership growth. Along with the progress we are able to make improving our members’ health, we also acquaint them with a variety of other Humana products and services. As of January 1, 2013, for 800,000 of our Medicare members, this includes the HumanaVitality \( ^{\circledR} \)  customized incentives-and-rewards well-being program that has proven popular and effective with our commercial membership.

2. Expand our provider contracts built on quality and cost incentives – Providers in Humana’s global risk arrangements are able to take care of our individual Medicare Advantage members for an average of 71 percent of the cost to original Medicare, compared to an average of 91 percent for providers without aligned incentives. Beyond cost savings, these arrangements allow us to offer our members better benefits. At the end of 2012, we had approximately 26.5 percent of our individual Medicare Advantage members in such arrangements; our goal is to increase that number to 50 percent by 2017.

3. Enhance our chronic care capabilities – Humana members living with multiple chronic conditions joined our chronic care programs in 2012 at a significantly higher rate than in 2011. By the end of the year the total had reached 150,000. We anticipate that number will expand again in 2013, with the timing of the expansion weighted, importantly, toward the first part of the year. Humana’s growing chronic care expertise enables an increasing number of our Medicare members to avoid hospitalizations and age with grace in their homes.

4. Grow our dual-eligible business – The 2012 dual-eligible milestone described above points the way toward further expansion in selected geographies in 2013.
2013 will be a year of continued focus on building our integrated care delivery model through capabilities, resources and efficiencies.



Grow Medicare membership



Expand incentive-based provider contracts



Enhance chronic-care capabilities



Grow dual-eligible business



Enhance member experience



Manage our portfolio



Achieve operating cost efficiencies



Build talent

*The 15 Percent Solution is Humana’s comprehensive clinical model designed to provide medical benefits for at least 15 percent less than it costs the federal government for comparable benefits in original Medicare, with the same or better quality.




In 2012, fulfilling a public commitment we made to our nation’s military, we surpassed our goal of hiring 1,000 veterans or veteran spouses between 2011 and 2014.

## 5. Enhance our member experience

– Through our long-standing and award-winning Perfect Service initiative, combined with the creation in 2012 of our customer service Center of Excellence, we are undertaking an end-to-end revamp of the Humana member experience. The emphasis is on simplicity, seamlessness, customization, and easy navigation of the complex health system.

## 6. Continue to execute on portfolio management –

Over time, we are committed to implementing the integrated care delivery model comprehensively across all our business segments: Retail; Employer Group; Health and Well-being Services, which includes our RightSource \( ^{®} \)  mail-order pharmacy business; and Other Businesses, which includes our three million military members, primarily dependents and retirees, covered through the Department of Defense’s TRICARE \( ^{®} \)  program.

7. Achieve additional operating cost efficiencies – By balancing administrative cost management, our focus on strategic initiatives, and operating model efficiencies, we will develop more flexibility for addressing the health insurance reform requirements that begin in 2014.

## 8. Continue to build talent –

Our ability to enhance our integrated care delivery model will depend on developing talent in the key areas of physician practice management, home health, customer segmentation, data analytics, and the customer experience.






## Conclusion

In summary, we believe Humana’s strategic focus and operational discipline position us well for the opportunities and challenges ahead. Our effective preparatory work around administrative cost reduction, clinical infrastructure expansion, and integrated care delivery enhancement has prepared us well for health reform’s next major phase of implementation. Humana’s long-term belief is that we can greatly improve health care’s cost and experience through a model that incorporates fixed payments to providers with aligned incentives, while enabling individuals – through actionable, real-time information – to meet their unique health and well-being needs. In that context, we believe our long experience with Medicare Advantage, combined with the continued development of our integrated care delivery model, will foster Humana’s success for years to come.

Sincerely,



Michael B. McCallister
Chairman of the Board
Stockholder



Bruce D. Broussard
Director, President and Chief Executive Officer
Stockholder







Standing left to right: James J. O'Brien, William J. McDonald, William E. Mitchell, David A. Jones, Jr., Michael B. McCallister, Kurt J. Hilzinger
Sitting left to right: Frank A. D'Amelio, W. Roy Dunbar, Bruce D. Broussard, Marissa T. Peterson, David B. Nash, M.D.

## Board of Directors

Michael B. McCallister
Chairman of the Board
Humana Inc.

Kurt J. Hilzinger
Partner
Court Square Capital Partners, LP
Lead Director
Humana Inc.

Bruce D. Broussard
President and Chief Executive Officer
Humana Inc.

Frank A. D'Amelio
Executive Vice President,
Business Operations and
Chief Financial Officer
Pfizer Inc.

W. Roy Dunbar
Former Chairman of the Board
NetworkSolutions

David A. Jones, Jr.
Chairman
Chrysalis Ventures, LLC

William J. McDonald
Former Executive Vice President
Brand Management
Capital One Financial Corporation

William E. Mitchell
Managing Partner
Sequel Capital Management, LLC

David B. Nash, M.D.
Founding Dean
Jefferson School of Population Health,
Thomas Jefferson University

James J. O'Brien
Chairman of the Board and
Chief Executive Officer
Ashland Inc.

Marissa T. Peterson
Former Executive Vice President
Worldwide Operations, Services
and Customer Advocacy
Sun Microsystems, Inc.



# UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

☑ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2012

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 (d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from ___ to ___ Commission file number 1-5975

HUMANA INC.

(Exact name of registrant as specified in its charter)

Delaware

61-0647538

(State of incorporation)

(I.R.S. Employer Identification Number)

500 West Main Street Louisville, Kentucky

40202

(Address of principal executive offices)

(Zip Code)

Registrant’s telephone number, including area code: (502) 580-1000

Securities registered pursuant to Section 12(b) of the Act:

Title of each class

Name of exchange on which registered

Common stock, $0.16 2/3 par value

New York Stock Exchange

Securities registered pursuant to Section 12(g) of the Act:

None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☑ No ☐

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes ☐ No ☑

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☑ No ☐

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T ( \( § $ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes ☑ No ☐

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. ☑

Indicate by checkmark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer ☑ Accelerated filer ☐ Non-accelerated filer ☐ Smaller reporting company ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☑

The aggregate market value of voting stock held by non-affiliates of the Registrant as of June 30, 2012 was $12,720,351,634 calculated using the average price on such date of $79.15.

The number of shares outstanding of the Registrant’s Common Stock as of January 31, 2013 was 158,356,929.

## DOCUMENTS INCORPORATED BY REFERENCE

Parts II and III incorporate herein by reference portions of the Registrant’s Proxy Statement to be filed pursuant to Regulation 14A with respect to the Annual Meeting of Stockholders scheduled to be held April 25, 2013.



## HUMANA INC.
INDEX TO ANNUAL REPORT ON FORM 10-K
For the Year Ended December 31, 2012

Page

Part I

Item 1. Business ..... 3
Item 1A. Risk Factors ..... 17
Item 1B. Unresolved Staff Comments ..... 34
Item 2. Properties ..... 35
Item 3. Legal Proceedings ..... 36
Item 4. Mine Safety Disclosures ..... 36

Part II

Item 5. Market for the Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities ..... 37
Item 6. Selected Financial Data ..... 39
Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations ..... 41
Item 7A. Quantitative and Qualitative Disclosures about Market Risk ..... 83
Item 8. Financial Statements and Supplementary Data ..... 85
Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure ..... 131
Item 9A. Controls and Procedures ..... 131
Item 9B. Other Information ..... 132

Part III

Item 10. Directors, Executive Officers and Corporate Governance ..... 133
Item 11. Executive Compensation ..... 136
Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters ..... 136
Item 13. Certain Relationships and Related Transactions, and Director Independence ..... 137
Item 14. Principal Accounting Fees and Services ..... 137

Part IV

Item 15. Exhibits, Financial Statement Schedules ..... 138
Signatures and Certifications ..... 150



## Forward-Looking Statements

Some of the statements under “Business,” “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” and elsewhere in this report may contain forward-looking statements which reflect our current views with respect to future events and financial performance. These forward-looking statements are made within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934, or the Exchange Act. We intend such forward-looking statements to be covered by the safe harbor provisions for forward-looking statements contained in the Private Securities Litigation Reform Act of 1995, and we are including this statement for purposes of complying with these safe harbor provisions. We have based these forward-looking statements on our current expectations and projections about future events, trends and uncertainties. These forward-looking statements are not guarantees of future performance and are subject to risks, uncertainties and assumptions, including the information discussed under the section entitled “Risk Factors” in this report. In making these statements, we are not undertaking to address or update them in future filings or communications regarding our business or results. Our business is highly complicated, regulated and competitive with many different factors affecting results.

## PART I

## ITEM 1. BUSINESS

## General

Headquartered in Louisville, Kentucky, Humana Inc. and its subsidiaries, referred to throughout this document as “we,” “us,” “our,” the “Company” or “Humana,” is a leading health care company that offers a wide range of insurance products and health and wellness services that incorporate an integrated approach to lifelong well-being. As of December 31, 2012, we had approximately 12.1 million members in our medical benefit plans, as well as approximately 8.1 million members in our specialty products. During 2012, 75% of our total premiums and services revenue were derived from contracts with the federal government, including 15% derived from our Medicare Advantage contracts in Florida with the Centers for Medicare and Medicaid Services, or CMS, under which we provide health insurance coverage to approximately 384,200 members as of December 31, 2012.

Humana Inc. was organized as a Delaware corporation in 1964. Our principal executive offices are located at 500 West Main Street, Louisville, Kentucky 40202, the telephone number at that address is (502) 580-1000, and our website address is www.humana.com. We have made available free of charge through the Investor Relations section of our web site our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, proxy statements, and, if applicable, amendments to those reports filed or furnished pursuant to Section 13(a) of the Exchange Act, as soon as reasonably practicable after we electronically file such material with, or furnish it to, the Securities and Exchange Commission.

This Annual Report on Form 10-K, or 2012 Form 10-K, contains both historical and forward-looking information. See Item 1A. – Risk Factors in this 2012 Form 10-K for a description of a number of factors that may adversely affect our results or business.

## Health Insurance Reform

In March 2010, the President signed into law The Patient Protection and Affordable Care Act and The Health Care and Education Reconciliation Act of 2010 (which we collectively refer to as the Health Insurance Reform Legislation) which enact significant reforms to various aspects of the U.S. health insurance industry. There are many provisions of the legislation that will require additional guidance and clarification in the form of regulations and interpretations in order to fully understand the impacts of the legislation on our overall business, which we expect to occur over the next several years.

Certain significant provisions of the Health Insurance Reform Legislation include, among others, mandated coverage requirements, rebates to policyholders based on minimum benefit ratios, adjustments to Medicare Advantage premiums, the establishment of federally facilitated or state-based exchanges coupled with programs



designed to spread risk among insurers, an annual insurance industry premium-based assessment, and a three-year commercial reinsurance fee. Implementation dates of the Health Insurance Reform Legislation began in September 2010 and continue through 2018. The Health Insurance Reform Legislation is discussed more fully in Item 7. – Management’s Discussion and Analysis of Financial Condition and Results of Operations under the section titled “Health Insurance Reform.”

## Business Segments

We manage our business with three reportable segments: Retail, Employer Group, and Health and Well-Being Services. In addition, the Other Businesses category includes businesses that are not individually reportable because they do not meet the quantitative thresholds required by generally accepted accounting principles. These segments are based on a combination of the type of health plan customer and adjacent businesses centered on well-being solutions for our health plans and other customers, as described below. These segment groupings are consistent with information used by our Chief Executive Officer to assess performance and allocate resources.

The Retail segment consists of Medicare and commercial fully-insured medical and specialty health insurance benefits, including dental, vision, and other supplemental health and financial protection products, marketed directly to individuals. The Employer Group segment consists of Medicare and commercial fully-insured medical and specialty health insurance benefits, including dental, vision, and other supplemental health and financial protection products, as well as administrative services only products marketed to employer groups. The Health and Well-Being Services segment includes services offered to our health plan members as well as to third parties that promote health and wellness, including provider services, pharmacy, integrated wellness, and home care services. The Other Businesses category consists of our military services, primarily our TRICARE South Region contract, Medicaid, and closed-block long-term care businesses as well as our contract with CMS to administer the Limited Income Newly Eligible Transition program, or the LI-NET program.

The results of each segment are measured by income before income taxes. Transactions between reportable segments consist of sales of services rendered by our Health and Well-Being Services segment, primarily pharmacy, behavioral health, and provider services, to our Retail and Employer Group customers. Intersegment sales and expenses are recorded at fair value and eliminated in consolidation. Members served by our segments often utilize the same provider networks, enabling us in some instances to obtain more favorable contract terms with providers. Our segments also share indirect costs and assets. As a result, the profitability of each segment is interdependent. We allocate most operating expenses to our segments. Assets and certain corporate income and expenses are not allocated to the segments, including the portion of investment income not supporting segment operations, interest expense on corporate debt, and certain other corporate expenses. These items are managed at the corporate level. These corporate amounts are reported separately from our reportable segments and included with intersegment eliminations.

## Our Products

Our medical and specialty insurance products allow members to access health care services primarily through our networks of health care providers with whom we have contracted. These products may vary in the degree to which members have coverage. Health maintenance organizations, or HMOs, generally require a referral from the member's primary care provider before seeing certain specialty physicians. Preferred provider organizations, or PPOs, provide members the freedom to choose a health care provider without requiring a referral. However PPOs generally require the member to pay a greater portion of the provider's fee in the event the member chooses not to use a provider participating in the PPO's network. Point of Service, or POS, plans combine the advantages of HMO plans with the flexibility of PPO plans. In general, POS plans allow members to choose, at the time medical services are needed, to seek care from a provider within the plan's network or outside the network. In addition, we offer services to our health plan members as well as to third parties that promote health and wellness, including pharmacy, provider services, integrated wellness, and home care services. At the core of our strategy is our integrated care delivery model, which unites quality care, high member engagement,



and sophisticated data analytics. Our approach to primary, physician-directed care for our members aims to provide quality care that is consistent, integrated, cost-effective, and member-focused. The model is designed to improve health outcomes and affordability for individuals and for the health system as a whole, while offering our members a simple, seamless healthcare experience. The discussion that follows describes the products offered by each of our segments.

## Our Retail Segment Products

This segment is comprised of products sold on a retail basis to individuals including medical and supplemental benefit plans described in the discussion that follows. The following table presents our premiums and services revenue for the Retail segment by product for the year ended December 31, 2012:

<table><tr><td></td><td>Retail Segment Premiums and Services Revenue</td><td>Percent of Consolidated Premiums and Services Revenue (dollars in millions)</td></tr><tr><td>Premiums:</td><td></td><td></td></tr><tr><td>Individual Medicare Advantage</td><td>$20,788</td><td>53.7%</td></tr><tr><td>Individual Medicare stand-alone PDP</td><td>2,587</td><td>6.7%</td></tr><tr><td>Total individual Medicare</td><td>23,375</td><td>60.4%</td></tr><tr><td>Individual commercial</td><td>1,004</td><td>2.6%</td></tr><tr><td>Individual specialty</td><td>171</td><td>0.4%</td></tr><tr><td>Total premiums</td><td>24,550</td><td>63.4%</td></tr><tr><td>Services</td><td>24</td><td>0.1%</td></tr><tr><td>Total premiums and services revenue</td><td>$24,574</td><td>63.5%</td></tr></table>

## Individual Medicare

We have participated in the Medicare program for private health plans for over 25 years and have established a national presence, offering at least one type of Medicare plan in all 50 states. We have a geographically diverse membership base that we believe provides us with greater ability to expand our network of PPO and HMO providers. We employ strategies including health assessments and clinical guidance programs such as lifestyle and fitness programs for seniors to guide Medicare beneficiaries in making cost-effective decisions with respect to their health care. We believe these strategies result in cost savings that occur from making positive behavior changes.

Medicare is a federal program that provides persons age 65 and over and some disabled persons under the age of 65 certain hospital and medical insurance benefits. CMS, an agency of the United States Department of Health and Human Services, administers the Medicare program. Hospitalization benefits are provided under Part A, without the payment of any premium, for up to 90 days per incident of illness plus a lifetime reserve aggregating 60 days. Eligible beneficiaries are required to pay an annually adjusted premium to the federal government to be eligible for physician care and other services under Part B. Beneficiaries eligible for Part A and Part B coverage under original Medicare are still required to pay out-of-pocket deductibles and coinsurance. Throughout this document this program is referred to as original Medicare. As an alternative to original Medicare, in geographic areas where a managed care organization has contracted with CMS pursuant to the Medicare Advantage program, Medicare beneficiaries may choose to receive benefits from a Medicare Advantage organization under Medicare Part C. Pursuant to Medicare Part C, Medicare Advantage organizations contract with CMS to offer Medicare Advantage plans to provide benefits at least comparable to those offered under original Medicare. Our Medicare Advantage plans are discussed more fully below. Prescription drug benefits are provided under Part D.



## Individual Medicare Advantage Products

We contract with CMS under the Medicare Advantage program to provide a comprehensive array of health insurance benefits, including wellness programs, to Medicare eligible persons under HMO, PPO, and Private Fee-For-Service, or PFFS, plans in exchange for contractual payments received from CMS, usually a fixed payment per member per month. With each of these products, the beneficiary receives benefits in excess of original Medicare, typically including reduced cost sharing, enhanced prescription drug benefits, care coordination, data analysis techniques to help identify member needs, complex case management, tools to guide members in their health care decisions, care management programs, wellness and prevention programs and, in some instances, a reduced monthly Part B premium. Most Medicare Advantage plans offer the prescription drug benefit under Part D as part of the basic plan, subject to cost sharing and other limitations. Accordingly, all of the provisions of the Medicare Part D program described in connection with our stand-alone prescription drug plans in the following section also are applicable to most of our Medicare Advantage plans. Medicare Advantage plans may charge beneficiaries monthly premiums and other copayments for Medicare-covered services or for certain extra benefits. Generally, Medicare-eligible individuals enroll in one of our plan choices between October 15 and December 7 for coverage that begins on the following January 1.

Our Medicare HMO and PPO plans, which cover Medicare-eligible individuals residing in certain counties, may eliminate or reduce coinsurance or the level of deductibles on many other medical services while seeking care from participating in-network providers or in emergency situations. Except in emergency situations or as specified by the plan, most HMO plans provide no out-of-network benefits. PPO plans carry an out-of-network benefit that is subject to higher member cost-sharing. In some cases, these beneficiaries are required to pay a monthly premium to the HMO or PPO plan in addition to the monthly Part B premium they are required to pay the Medicare program.

On January 1, 2011, most of our members enrolled in PFFS plans transitioned to networked-based PPO type products due to a requirement that Medicare Advantage organizations establish adequate provider networks, except in geographic areas that CMS determines have fewer than two network-based Medicare Advantage plans. Our Medicare PFFS plans generally have no preferred network. Individuals in these plans pay us a monthly premium to receive typical Medicare Advantage benefits along with the freedom to choose any health care provider that accepts individuals at rates equivalent to original Medicare payment rates.

CMS uses monthly rates per person for each county to determine the fixed monthly payments per member to pay to health benefit plans. These rates are adjusted under CMS’s risk-adjustment model which uses health status indicators, or risk scores, to improve the accuracy of payment. The risk-adjustment model, which CMS implemented pursuant to the Balanced Budget Act of 1997 (BBA) and the Benefits and Improvement Protection Act of 2000 (BIPA), generally pays more for members with predictably higher costs and uses principal hospital inpatient diagnoses as well as diagnosis data from ambulatory treatment settings (hospital outpatient department and physician visits) to establish the risk-adjustment payments. Under the risk-adjustment methodology, all health benefit organizations must collect from providers and submit the necessary diagnosis code information to CMS within prescribed deadlines.

At December 31, 2012, we provided health insurance coverage under CMS contracts to approximately 1,927,600 individual Medicare Advantage members, including approximately 384,200 members in Florida. These Florida contracts accounted for premiums revenue of approximately $5.9 billion, which represented approximately 28% of our individual Medicare Advantage premiums revenue, or 15% of our consolidated premiums and services revenue for the year ended December 31, 2012.

Our HMO and PPO products covered under Medicare Advantage contracts with CMS are renewed generally for a calendar year term unless CMS notifies us of its decision not to renew by August 1 of the calendar year in which the contract would end, or we notify CMS of our decision not to renew by the first Monday in June of the calendar year in which the contract would end. All material contracts between Humana and CMS relating to our Medicare Advantage products have been renewed for 2013, and all of our product offerings filed with CMS for 2013 have been approved.



## Individual Medicare Stand-Alone Prescription Drug Products

We offer stand-alone prescription drug plans, or PDPs, under Medicare Part D, including a PDP plan co-branded with Wal-Mart Stores, Inc., or the Humana-Walmart plan. Generally, Medicare-eligible individuals enroll in one of our plan choices between October 15 and December 7 for coverage that begins on the following January 1. Our stand-alone PDP offerings consist of plans offering basic coverage with benefits mandated by Congress, as well as plans providing enhanced coverage with varying degrees of out-of-pocket costs for premiums, deductibles, and co-insurance. Our revenues from CMS and the beneficiary are determined from our PDP bids submitted annually to CMS. These revenues also reflect the health status of the beneficiary and risk sharing provisions as more fully described in Item 7. – Management’s Discussion and Analysis of Financial Condition and Results of Operations under the section titled “Medicare Part D Provisions.” Our stand-alone PDP contracts with CMS are renewed generally for a calendar year term unless CMS notifies us of its decision not to renew by August 1 of the calendar year in which the contract would end, or we notify CMS of our decision not to renew by the first Monday in June of the calendar year in which the contract would end. All material contracts between Humana and CMS relating to our Medicare stand-alone PDP products have been renewed for 2013, and all of our product offerings filed with CMS for 2013 have been approved.

## Medicare and Medicaid Dual Eligible

Medicare beneficiaries who also qualify for Medicaid due to low income or special needs are known as dual eligible beneficiaries, or dual eligibles. There were approximately 9 million dual eligible individuals in the United States in 2012. These dual eligibles may enroll in a privately-offered Medicare Advantage product, but may also receive assistance from Medicaid for Medicaid benefits, such as nursing home care and/or assistance with Medicare premiums and cost sharing. As of December 31, 2012, we served approximately 285,500 dual eligible members in our Medicare Advantage plans and approximately 697,300 dual eligible members in our stand-alone prescription drug plans. During 2012, we were successful in our bids for Medicaid business in Ohio, Illinois, and Kentucky, including dual eligible beneficiaries in both Ohio and Illinois. We partnered with CareSource Management Group Company to serve the Ohio and Kentucky individuals under a March 2012 strategic alliance agreement.

## Individual Commercial Coverage

Our individual health plans, marketed under the HumanaOne \( ^{®} \)  brand, include offerings designed to promote wellness and engage consumers. HumanaOne plans are designed specifically for self-employed entrepreneurs, small-business employees, part-time workers, students, and early retirees and include a broad spectrum of major medical benefits with multiple in-network coinsurance levels and annual deductible choices, as well as HumanaVitality \( ^{®} \) , our wellness and loyalty rewards program.

Our HumanaOne plans primarily are offered as PPO plans in select markets where we can generally underwrite risk and utilize our existing networks and distribution channels. This individual product includes provisions mandated by law to guarantee renewal of coverage for as long as the individual chooses.

The HumanaOne plans can be further customized with optional benefits such as dental, vision, life, and a broad portfolio of financial protection products.



## Our Employer Group Segment Products

This segment is comprised of products sold to employer groups including medical and supplemental benefit plans described in the discussion that follows. The following table presents our premiums and services revenue for the Employer Group segment by product for the year ended December 31, 2012:

<table><tr><td></td><td>Employer Group Segment Premiums and Services Revenue</td><td>Percent of Consolidated Premiums and Services Revenue</td></tr><tr><td>Premiums:</td><td></td><td></td></tr><tr><td>Fully-insured commercial group</td><td>$ 4,996</td><td>12.9 %</td></tr><tr><td>Group Medicare Advantage</td><td>4,064</td><td>10.5 %</td></tr><tr><td>Group Medicare stand-alone PDP</td><td>8</td><td>0.0 %</td></tr><tr><td>Total group Medicare</td><td>4,072</td><td>10.5 %</td></tr><tr><td>Group specialty</td><td>1,070</td><td>2.8 %</td></tr><tr><td>Total premiums</td><td>10,138</td><td>26.2 %</td></tr><tr><td>Services</td><td>358</td><td>0.9 %</td></tr><tr><td>Total premiums and services revenue</td><td>$10,496</td><td>27.1 %</td></tr></table>

## Employer Group Commercial Coverage

Our commercial products sold to employer groups include a broad spectrum of major medical benefits with multiple in-network coinsurance levels and annual deductible choices that employers of all sizes can offer to their employees on either a fully-insured, through HMO, PPO, or POS plans, or self-funded basis. Our plans integrate clinical programs, plan designs, communication tools, and spending accounts. We participate in the Federal Employee Health Benefits Program, or FEHBP, primarily with our HMO offering in certain markets. FEHBP is the government’s health insurance program for Federal employees, retirees, former employees, family members, and spouses. As with our individual commercial products, the employer group offerings include HumanaVitality \( ^{®} \) , our wellness and loyalty reward program.

Our administrative services only, or ASO, products are offered to employers who self-insure their employee health plans. We receive fees to provide administrative services which generally include the processing of claims, offering access to our provider networks and clinical programs, and responding to customer service inquiries from members of self-funded employers. These products may include all of the same benefit and product design characteristics of our fully-insured HMO, PPO, or POS products described previously. Under ASO contracts, self-funded employers generally retain the risk of financing substantially all of the cost of health benefits. However, more than half of our ASO customers purchase stop loss insurance coverage from us to cover catastrophic claims or to limit aggregate annual costs.

As with individual commercial policies, employers can customize their offerings with optional benefits such as dental, vision, life, and a broad portfolio of financial protection products.

## Group Medicare Advantage and Medicare stand-alone PDP

We offer products that enable employers that provide post-retirement health care benefits to replace Medicare wrap or Medicare supplement products with Medicare Advantage or stand-alone PDPs from Humana. These products offer the same types of benefits and services available to members in our individual Medicare plans discussed previously and can be tailored to closely match an employer’s post-retirement benefit structure.



## Our Health and Well-Being Services Segment Products

This segment is comprised of stand-alone businesses that promote health and well-being. These services are sold primarily to other Humana businesses, as well as external health plan members, external health plans, and other employers or individuals and are described in the discussion that follows. Our intersegment revenue is described in Note 16 to the consolidated financial statements included in Item 8. – Financial Statements and Supplementary Data. The following table presents our services revenue for the Health and Well-Being Services segment by line of business for the year ended December 31, 2012:

<table><tr><td></td><td>Health and Well-Being Services Segment Premiums and Services Revenue</td><td>Percent of Consolidated Premiums and Services Revenue</td></tr><tr><td>Intersegment revenue:</td><td></td><td></td></tr><tr><td>Pharmacy solutions</td><td>$11,352</td><td>n/a</td></tr><tr><td>Provider services</td><td>214</td><td>n/a</td></tr><tr><td>Integrated wellness services</td><td>219</td><td>n/a</td></tr><tr><td>Home care services</td><td>167</td><td>n/a</td></tr><tr><td>Total intersegment revenue</td><td>$11,952</td><td></td></tr><tr><td>External services revenue:</td><td></td><td></td></tr><tr><td>Provider services</td><td>$ 967</td><td>2.5 %</td></tr><tr><td>Home care services</td><td>40</td><td>0.1 %</td></tr><tr><td>Pharmacy solutions</td><td>16</td><td>0.0 %</td></tr><tr><td>Integrated wellness services</td><td>13</td><td>0.0 %</td></tr><tr><td>Total external services revenue</td><td>$ 1,036</td><td>2.6 %</td></tr></table>

n/a – not applicable

## Pharmacy solutions

Humana Pharmacy Solutions \( ^{®} \) , or HPS, manages traditional prescription drug coverage for both individuals and employer groups in addition to providing a broad array of pharmacy solutions. HPS also operates prescription mail order services for brand, generic, and specialty drugs and diabetic supplies through RightSourceRx \( ^{®} \) , as well as research services.

## Provider services

Our subsidiary, Concentra Inc. \( ^{®} \) , acquired in December 2010, delivers primary care, occupational medicine, urgent care, physical therapy, and wellness services to employees and the general public through its operation of medical centers and worksite medical facilities.

Our CAC Medical Centers, or CAC, in South Florida operate full-service, multi-specialty medical centers staffed by primary care providers and medical specialists practicing cardiology, endocrinology, geriatric medicine, internal medicine, ophthalmology, neurology, and podiatry.

We acquired Metropolitan Health Networks, Inc., or Metropolitan, on December 21, 2012, and we acquired a noncontrolling equity interest in MCCI Holdings, LLC, or MCCI, on October 29, 2012. Metropolitan and MCCI are Medical Services Organizations, or MSOs, that coordinate medical care for Medicare Advantage beneficiaries and Medicaid recipients, primarily in Florida and Texas. The Metropolitan and MCCI transactions are expected to provide us with components of a successful integrated care delivery model that has demonstrated scalability to new markets. A substantial portion of the revenues for both Metropolitan and MCCI are derived from services provided to Humana Medicare Advantage members under capitation contracts with our health



plans. In addition, Metropolitan and MCCI provide services to Medicare Advantage and Medicaid members under capitation contracts with third party health plans. Under these capitation agreements with Humana and third party health plans, Metropolitan and MCCI assume financial risk associated with these Medicare Advantage and Medicaid members.

## Integrated wellness services

Corphealth, Inc. (d/b/a LifeSynch \( ^{®} \) ), a Humana subsidiary, offers care management services through an innovative suite of integrated products, integrating behavioral health services with wellness programs, and employee assistance programs and work-life services. LifeSynch’s integrated wellness services include Hummingbird Coaching \( ^{®} \) , a wellness coaching company that offers a comprehensive turn-key coaching program, an enhancement to a medically based coaching protocol and a platform that makes coaching programs more efficient.

HumanaVitality, LLC, a joint venture with Discovery Holdings Ltd., provides our members with access to a science-based, actuarially driven wellness and loyalty program that features a wide range of well-being tools and rewards that are customized to an individual’s needs and wants. HumanaVitality \( ^{®} \)  became available to certain of our members in mid-2011. A key element of the program includes a sophisticated health-behavior-change model supported by an actuarially sound incentive program.

## Home care services

Home care services include the operations of SeniorBridge Family Companies, Inc., or SeniorBridge, acquired July 6, 2012, and Humana Cares \( ^{®} \) . As a chronic-care provider of in-home care for seniors, we provide innovative and holistic care coordination services for individuals living with multiple chronic conditions, individuals with disabilities, fragile and aging-in-place members and their care givers. We focus our deployment of these services in geographies, such as Florida, with a high concentration of members living with multiple chronic conditions.

## Other Businesses

Products and services offered by our Other Businesses are described in the discussion that follows. The following table presents our premiums and services revenue for our Other Businesses for the year ended December 31, 2012:

<table><tr><td></td><td>Other Businesses Premiums and Services Revenue</td><td>Percent of Consolidated Premiums and Services Revenue (dollars in millions)</td></tr><tr><td>Premiums:</td><td></td><td></td></tr><tr><td>Military services</td><td>$1,017</td><td>2.6%</td></tr><tr><td>Medicaid</td><td>1,003</td><td>2.6%</td></tr><tr><td>LI-NET</td><td>266</td><td>0.7%</td></tr><tr><td>Closed-block long-term care</td><td>35</td><td>0.1%</td></tr><tr><td>Total premiums</td><td>2,321</td><td>6.0%</td></tr><tr><td>Services</td><td>308</td><td>0.8%</td></tr><tr><td>Total premiums and services revenue</td><td>$2,629</td><td>6.8%</td></tr></table>

## Military Services

Under our TRICARE South Region contract with the United States Department of Defense, or DoD, we provide administrative services to arrange health care services for the dependents of active duty military



personnel and for retired military personnel and their dependents. Currently, three health benefit options are available to TRICARE beneficiaries. In addition to a traditional indemnity option, participants may enroll in an HMO-like plan with a point-of-service option or take advantage of reduced copayments by using a network of preferred providers, similar to a PPO.

We have participated in the TRICARE program since 1996 under contracts with the DoD. On April 1, 2012, we began delivering services under a new TRICARE South Region contract that the Department of Defense TRICARE Management Activity, or TMA, awarded to us on February 25, 2011. Under the new contract, we provide administrative services, including offering access to our provider networks and clinical programs, claim processing, customer service, enrollment, and other services, while the federal government retains all of the risk of the cost of health benefits. Accordingly, we account for revenues under the new contract net of estimated health care costs similar to an administrative services fee only agreement. Our current TRICARE South Region contract covers approximately 3,123,900 eligible beneficiaries as of December 31, 2012 in Florida, Georgia, South Carolina, Mississippi, Alabama, Tennessee, Louisiana, Arkansas, Texas, Oklahoma, and Kentucky (the Fort Campbell area only). The South Region is one of the three regions in the United States as defined by the Department of Defense. We have subcontracted with third parties to provide selected administration and specialty services under the contract. The new 5-year South Region contract, which expires March 31, 2017, is subject to annual renewals on April 1 of each year during its term at the government's option. The TMA has notified us of its intent to exercise its option to extend the TRICARE South Region contract through March 31, 2014.

Our previous TRICARE South Region contract that expired on March 31, 2012, provided a financial interest in the underlying health care cost; therefore, we reported revenues on a gross basis. We shared the risk with the federal government for the cost of health benefits incurred under our previous contract, earning more revenue or incurring additional cost based on the variance of actual health care costs from an annually negotiated target health care cost. The TRICARE South Region contract represented approximately 93% of total military services premiums and services revenue for the year ended December 31, 2012.

## Medicaid

Medicaid is a federal program that is state-operated to facilitate the delivery of health care services primarily to low-income residents. Each electing state develops, through a state-specific regulatory agency, a Medicaid managed care initiative that must be approved by CMS. CMS requires that Medicaid managed care plans meet federal standards and cost no more than the amount that would have been spent on a comparable fee-for-service basis. States currently either use a formal proposal process in which they review many bidders before selecting one or award individual contracts to qualified bidders who apply for entry to the program. In either case, the contractual relationship with a state generally is for a one-year period. Under these contracts, we receive a fixed monthly payment from a government agency for which we are required to provide health insurance coverage to enrolled members. Due to the increased emphasis on state health care reform and budgetary constraints, more states are utilizing a managed care product in their Medicaid programs.

Our Medicaid business consists of contracts in Puerto Rico and Florida, with the vast majority in Puerto Rico.

## LI-NET

In 2010, we began to administer CMS’s LI-NET program. This program allows individuals who receive Medicare’s low-income subsidy to also receive immediate prescription drug coverage at the point of sale if they are not already enrolled in a Medicare Part D plan. CMS temporarily enrolls newly identified individuals with both Medicare and Medicaid into the LI-NET program, and subsequently transitions each member into a Medicare Part D plan that may or may not be a Humana Medicare plan.



## Closed Block of Long-Term Care Insurance

We have a closed block of approximately 34,000 long-term care policies associated with our acquisition of KMG America Corporation in 2007. Long-term care policies are intended to protect the insured from the cost of long-term care services including those provided by nursing homes, assisted living facilities, and adult day care as well as home health care services. No new policies have been written since 2005 under this closed block.

## Membership

The following table summarizes our total medical membership at December 31, 2012, by market and product:

<table><tr><td rowspan="2"></td><td colspan="3">Retail Segment</td><td colspan="4">Employer Group Segment</td><td rowspan="3">Other Businesses</td><td rowspan="3">Percent Total</td></tr><tr><td>Individual Medicare Advantage</td><td>Individual Medicare stand-alone PDP</td><td>Individual Commercial</td><td>Fully-insured commercial</td><td>(in thousands) Group Medicare Advantage and stand-alone PDP</td><td>ASO</td></tr><tr><td>Texas</td><td>153.4</td><td>223.6</td><td>77.0</td><td>289.5</td><td>53.2</td><td>122.2</td><td>0</td><td>918.9</td></tr><tr><td>Florida</td><td>384.2</td><td>193.0</td><td>78.7</td><td>147.9</td><td>21.4</td><td>37.8</td><td>0</td><td>863.0</td><td>7.1%</td></tr><tr><td>Kentucky</td><td>44.6</td><td>55.2</td><td>22.1</td><td>98.6</td><td>34.0</td><td>507.7</td><td>0</td><td>762.2</td><td>6.3%</td></tr><tr><td>Illinois</td><td>70.9</td><td>101.8</td><td>40.5</td><td>153.3</td><td>5.9</td><td>131.7(a)</td><td>0</td><td>504.1</td><td>4.2%</td></tr><tr><td>Ohio</td><td>53.3</td><td>103.9</td><td>6.3</td><td>50.0</td><td>141.6</td><td>146.5</td><td>0</td><td>501.6</td><td>4.1%</td></tr><tr><td>Wisconsin</td><td>50.8</td><td>57.9</td><td>14.0</td><td>98.0</td><td>12.5</td><td>138.7</td><td>0</td><td>371.9</td><td>3.1%</td></tr><tr><td>California</td><td>25.6</td><td>310.5</td><td>4.1</td><td>0.2</td><td>0.1</td><td>0</td><td>0</td><td>340.5</td><td>2.8%</td></tr><tr><td>Georgia</td><td>63.3</td><td>62.4</td><td>54.4</td><td>96.8</td><td>7.6</td><td>44.2</td><td>0</td><td>328.7</td><td>2.7%</td></tr><tr><td>Missouri/Kansas</td><td>79.5</td><td>147.0</td><td>14.4</td><td>44.2</td><td>5.3</td><td>8.0</td><td>0</td><td>298.4</td><td>2.5%</td></tr><tr><td>Tennessee</td><td>101.9</td><td>76.6</td><td>18.2</td><td>39.8</td><td>2.0</td><td>32.0</td><td>0</td><td>270.5</td><td>2.2%</td></tr><tr><td>Louisiana</td><td>105.9</td><td>35.9</td><td>16.4</td><td>44.1</td><td>7.7</td><td>29.7</td><td>0</td><td>239.7</td><td>2.0%</td></tr><tr><td>North Carolina</td><td>70.4</td><td>107.3</td><td>5.9</td><td>0.1</td><td>0.6</td><td>0</td><td>0</td><td>184.3</td><td>1.5%</td></tr><tr><td>Michigan</td><td>44.5</td><td>96.1</td><td>10.5</td><td>12.4</td><td>12.1</td><td>2.8</td><td>0</td><td>178.4</td><td>1.5%</td></tr><tr><td>Indiana</td><td>44.8</td><td>78.2</td><td>6.3</td><td>21.3</td><td>2.0</td><td>24.7</td><td>0</td><td>177.3</td><td>1.5%</td></tr><tr><td>Virginia</td><td>75.5</td><td>83.9</td><td>4.0</td><td>0</td><td>2.5</td><td>0</td><td>0</td><td>165.9</td><td>1.4%</td></tr><tr><td>Arizona</td><td>44.9</td><td>44.7</td><td>16.0</td><td>24.5</td><td>1.6</td><td>5.3</td><td>0</td><td>137.0</td><td>1.1%</td></tr><tr><td>Colorado</td><td>25.6</td><td>45.4</td><td>37.8</td><td>18.3</td><td>6.6</td><td>0.4</td><td>0</td><td>134.1</td><td>1.1%</td></tr><tr><td>Military services</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>3,123.9</td><td>3,123.9</td><td>25.8%</td></tr><tr><td>Medicaid and other</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>610.8</td><td>610.8</td><td>5.1%</td></tr><tr><td>LI-NET</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>67.1</td><td>67.1</td><td>0.6%</td></tr><tr><td>Others</td><td>488.5</td><td>1,162.2</td><td>94.8</td><td>72.8</td><td>58.5</td><td>33.7</td><td>0</td><td>1,910.5</td><td>15.8%</td></tr><tr><td>Totals</td><td>1,927.6</td><td>2,985.6</td><td>521.4</td><td>1,211.8</td><td>375.2</td><td>1,265.4</td><td>3,801.8</td><td>12,088.8</td><td>100.0%</td></tr></table>

(a) Includes 27,700 Medicare Advantage ASO members.

## Provider Arrangements

We provide our members with access to health care services through our networks of health care providers whom we own or with whom we have contracted, including hospitals and other independent facilities such as outpatient surgery centers, primary care providers, specialist physicians, dentists, and providers of ancillary health care services and facilities. These ancillary services and facilities include laboratories, ambulance services, medical equipment services, home health agencies, mental health providers, rehabilitation facilities, nursing homes, optical services, and pharmacies. Our membership base and the ability to influence where our members seek care generally enable us to obtain contractual discounts with providers.



We use a variety of techniques to provide access to effective and efficient use of health care services for our members. These techniques include the coordination of care for our members, product and benefit designs, hospital inpatient management systems, the use of sophisticated analytics, and enrolling members into various care management programs. The focal point for health care services in many of our HMO networks is the primary care provider who, under contract with us, provides services to our members, and may control utilization of appropriate services by directing or approving hospitalization and referrals to specialists and other providers. Some physicians may have arrangements under which they can earn bonuses when certain target goals relating to the provision of quality patient care are met. We have available care management programs related to complex chronic conditions such as congestive heart failure and coronary artery disease. We also have programs for prenatal and premature infant care, asthma related illness, end stage renal disease, diabetes, cancer, and certain other conditions.

We typically contract with hospitals on either (1) a per diem rate, which is an all-inclusive rate per day, (2) a case rate or diagnosis-related groups (DRG), which is an all-inclusive rate per admission, or (3) a discounted charge for inpatient hospital services. Outpatient hospital services generally are contracted at a flat rate by type of service, ambulatory payment classifications, or APCs, or at a discounted charge. APCs are similar to flat rates except multiple services and procedures may be aggregated into one fixed payment. These contracts are often multi-year agreements, with rates that are adjusted for inflation annually based on the consumer price index, other nationally recognized inflation indexes, or specific negotiations with the provider. Outpatient surgery centers and other ancillary providers typically are contracted at flat rates per service provided or are reimbursed based upon a nationally recognized fee schedule such as the Medicare allowable fee schedule.

Our contracts with physicians typically are renewed automatically each year, unless either party gives written notice, generally ranging from 90 to 120 days, to the other party of its intent to terminate the arrangement. Most of the physicians in our PPO networks and some of our physicians in our HMO networks are reimbursed based upon a fixed fee schedule, which typically provides for reimbursement based upon a percentage of the standard Medicare allowable fee schedule.

The terms of our contracts with hospitals and physicians may also vary between Medicare and commercial business. A significant portion of our Medicare network contracts, including those with both hospitals and physicians, are tied to Medicare reimbursement levels and methodologies.

The Budget Control Act of 2011 established a twelve-member joint committee of Congress known as the Joint Select Committee on Deficit Reduction to propose legislation to reduce the United States federal deficit by $1.5 trillion for fiscal years 2012-2021. The failure of the Joint Select Committee on Deficit Reduction to achieve a targeted deficit reduction by December 23, 2011 triggered an automatic reduction, including aggregate reductions to Medicare payments to providers of up to 2 percent per fiscal year. Although these reductions are scheduled to take effect on March 1, 2013, at this time it is unclear how this automatic reduction may be applied to various Medicare healthcare programs or the timing of when such reductions may actually begin. We expect that if such reductions were to occur, there would be a corresponding substantial reduction in our obligations to providers. Due to the uncertainty around the timing or application of any such reductions, there can be no assurances that we could completely offset any reductions to the Medicare healthcare programs applied by the Budget Control Act of 2011.

## Capitation

For some of our medical membership, we share risk with providers under capitation contracts where physicians and hospitals accept varying levels of financial risk for a defined set of membership, primarily HMO. Under the typical capitation arrangement, we prepay these providers a monthly fixed-fee per member, known as a capitation (per capita) payment, to cover all or a defined portion of the benefits provided to the capitated member.



We believe these risk-based models represent a key element of our integrated care delivery model at the core of our strategy. Our health plan subsidiaries may enter into these risk-based contracts with third party providers or our owned provider subsidiaries, including Metropolitan, an MSO acquired December 21, 2012.

At December 31, 2012, approximately 1,131,700 members, or 9.4% of our medical membership, were covered under risk-based contracts, including 511,700 individual Medicare Advantage members, or 26.5% of our total individual Medicare Advantage membership.

Physicians under capitation arrangements typically have stop loss coverage so that a physician’s financial risk for any single member is limited to a maximum amount on an annual basis. We typically process all claims and monitor the financial performance and solvency of our capitated providers. However, we delegated claim processing functions under capitation arrangements covering approximately 124,500 HMO members, including 73,500 individual Medicare Advantage members, at December 31, 2012, with the provider assuming substantially all the risk of coordinating the members’ health care benefits. Capitation expense under delegated arrangements for which we have a limited view of the underlying claims experience was approximately $633 million, or 2.0% of total benefits expense, for the year ended December 31, 2012. We remain financially responsible for health care services to our members in the event our providers fail to provide such services.

## Accreditation Assessment

Our accreditation assessment program consists of several internal programs, including those that credential providers and those designed to meet the audit standards of federal and state agencies, as well as external accreditation standards. We also offer quality and outcome measurement and improvement programs such as the Health Care Effectiveness Data and Information Sets, or HEDIS, which is used by employers, government purchasers and the National Committee for Quality Assurance, or NCQA, to evaluate health plans based on various criteria, including effectiveness of care and member satisfaction.

Providers participating in our networks must satisfy specific criteria, including licensing, patient access, office standards, after-hours coverage, and other factors. Most participating hospitals also meet accreditation criteria established by CMS and/or the Joint Commission on Accreditation of Healthcare Organizations.

Recredentialing of participating providers occurs every two to three years, depending on applicable state laws. Recredentialing of participating providers includes verification of their medical licenses; review of their malpractice liability claims histories; review of their board certifications, if applicable; and review of applicable quality information. A committee, composed of a peer group of providers, reviews the applications of providers being considered for credentialing and recredentialing.

We request accreditation for certain of our health plans and/or departments from NCQA, the Accreditation Association for Ambulatory Health Care, and the Utilization Review Accreditation Commission, or URAC. Accreditation or external review by an approved organization is mandatory in the states of Florida and Kansas for licensure as an HMO. Certain commercial businesses, like those impacted by a third-party labor agreement or those where a request is made by the employer, may require or prefer accredited health plans.

NCQA performs reviews of our compliance with standards for quality improvement, credentialing, utilization management, member connections, and member rights and responsibilities. We have achieved and maintained NCQA accreditation in most of our commercial, Medicare and Medicaid HMO/POS markets with enough history and membership, except Puerto Rico, and for many of our PPO markets.

## Sales and Marketing

We use various methods to market our products, including television, radio, the Internet, telemarketing, and direct mailings.



At December 31, 2012, we employed approximately 1,700 sales representatives, as well as approximately 900 telemarketing representatives who assisted in the marketing of individual Medicare and individual commercial health insurance and specialty products in our Retail segment, including making appointments for sales representatives with prospective members. We also market our individual Medicare products via a strategic alliance with Wal-Mart Stores, Inc., or Wal-Mart. This alliance includes stationing Humana representatives in certain Wal-Mart stores, SAM'S CLUB locations, and Neighborhood Markets across the country providing an opportunity to enroll Medicare eligible individuals in person. In addition, we market our individual Medicare and individual commercial health insurance and specialty products through licensed independent brokers and agents. For our Medicare products, commissions paid to employed sales representatives and independent brokers and agents are based on a per unit commission structure, regulated in structure and amount by CMS. For our individual commercial health insurance and specialty products, we generally pay brokers a commission based on premiums, with commissions varying by market and premium volume. In addition to a commission based directly on premium volume for sales to particular customers, we also have programs that pay brokers and agents based on other metrics. These include commission bonuses based on sales that attain certain levels or involve particular products. We also pay additional commissions based on aggregate volumes of sales involving multiple customers.

In our Employer Group segment, individuals may become members of our commercial HMOs and PPOs through their employers or other groups, which typically offer employees or members a selection of health insurance products, pay for all or part of the premiums, and make payroll deductions for any premiums payable by the employees. We attempt to become an employer’s or group’s exclusive source of health insurance benefits by offering a variety of HMO, PPO, and specialty products that provide cost-effective quality health care coverage consistent with the needs and expectations of their employees or members. We also sell group Medicare Advantage products through large employers. We use licensed independent brokers, independent agents, and employees to sell our group products. Many of our larger employer group customers are represented by insurance brokers and consultants who assist these groups in the design and purchase of health care products. We pay brokers and agents using the same commission structure described above for our individual commercial health insurance and specialty products.

## Underwriting

Through the use of internally developed underwriting criteria, we determine the risk we are willing to assume and the amount of premium to charge for our commercial products. In most instances, employer and other groups must meet our underwriting standards in order to qualify to contract with us for coverage. Small group laws in some states have imposed regulations which provide for guaranteed issue of certain health insurance products and prescribe certain limitations on the variation in rates charged based upon assessment of health conditions. Beginning in 2014, the Health Insurance Reform Legislation requires all individual and group health plans to guarantee issuance and renew coverage without pre-existing condition exclusions or health-status rating adjustments.

Underwriting techniques are not employed in connection with our Medicare, military services, or Medicaid products because government regulations require us to accept all eligible applicants regardless of their health or prior medical history.

## Competition

The health benefits industry is highly competitive. Our competitors vary by local market and include other managed care companies, national insurance companies, and other HMOs and PPOs, including HMOs and PPOs owned by Blue Cross/Blue Shield plans. Many of our competitors have larger memberships and/or greater financial resources than our health plans in the markets in which we compete. Our ability to sell our products and to retain customers may be influenced by such factors as those described in the section entitled “Risk Factors” in this 2012 Form 10-K.



## Government Regulation

Diverse legislative and regulatory initiatives at both the federal and state levels continue to affect aspects of the nation’s health care system.

Our management works proactively to ensure compliance with all governmental laws and regulations affecting our business. We are unable to predict how existing federal or state laws and regulations may be changed or interpreted, what additional laws or regulations affecting our businesses may be enacted or proposed, when and which of the proposed laws will be adopted or what effect any such new laws and regulations will have on our results of operations, financial position, or cash flows.

For a description of certain material current activities in the federal and state legislative areas, see the section entitled “Risk Factors” in this 2012 Form 10-K.

## Certain Other Services

## Captive Insurance Company

We bear general business risks associated with operating our Company such as professional and general liability, employee workers' compensation, and officer and director errors and omissions risks. Professional and general liability risks may include, for example, medical malpractice claims and disputes with members regarding benefit coverage. We retain certain of these risks through our wholly-owned, captive insurance subsidiary. We reduce exposure to these risks by insuring levels of coverage for losses in excess of our retained limits with a number of third-party insurance companies. We remain liable in the event these insurance companies are unable to pay their portion of the losses.

## Centralized Management Services

We provide centralized management services to each of our health plans and to our business segments from our headquarters and service centers. These services include management information systems, product development and administration, finance, human resources, accounting, law, public relations, marketing, insurance, purchasing, risk management, internal audit, actuarial, underwriting, claims processing, billing/enrollment, and customer service.

## Employees

As of December 31, 2012, we had approximately 43,400 employees and approximately 2,400 medical professionals working under management agreements between Concentra and affiliated physician-owned associations. We believe we have good relations with our employees and have not experienced any work stoppages.



## ITEM 1A. RISK FACTORS

If we do not design and price our products properly and competitively, if the premiums we charge are insufficient to cover the cost of health care services delivered to our members, if we are unable to implement clinical initiatives to provide a better health care experience for our members, lower costs and appropriately document the risk profile of our members, or if our estimates of benefits expense are inadequate, our profitability may be materially adversely affected. We estimate the costs of our benefits expense payments, and design and price our products accordingly, using actuarial methods and assumptions based upon, among other relevant factors, claim payment patterns, medical cost inflation, and historical developments such as claim inventory levels and claim receipt patterns. These estimates, however involve extensive judgment, and have considerable inherent variability because they are extremely sensitive to changes in payment patterns and medical cost trends.

We use a substantial portion of our revenues to pay the costs of health care services delivered to our members. These costs include claims payments, capitation payments to providers (predetermined amounts paid to cover services), and various other costs incurred to provide health insurance coverage to our members. These costs also include estimates of future payments to hospitals and others for medical care provided to our members. Generally, premiums in the health care business are fixed for one-year periods. Accordingly, costs we incur in excess of our benefit cost projections generally are not recovered in the contract year through higher premiums. We estimate the costs of our future benefit claims and other expenses using actuarial methods and assumptions based upon claim payment patterns, medical inflation, historical developments, including claim inventory levels and claim receipt patterns, and other relevant factors. We also record benefits payable for future payments. We continually review estimates of future payments relating to benefit claims costs for services incurred in the current and prior periods and make necessary adjustments to our reserves. However, these estimates involve extensive judgment, and have considerable inherent variability that is sensitive to payment patterns and medical cost trends. Many factors may and often do cause actual health care costs to exceed what was estimated and used to set our premiums. These factors may include:

• increased use of medical facilities and services, including prescription drugs;

• increased cost of such services;

• our membership mix;

- variances in actual versus estimated levels of cost associated with new products, benefits or lines of business, product changes or benefit level changes;

• changes in the demographic characteristics of an account or market;

- changes or reductions of our utilization management functions such as preauthorization of services, concurrent review or requirements for physician referrals;

• changes in our pharmacy volume rebates received from drug manufacturers;

- catastrophes, including acts of terrorism, public health epidemics, or severe weather (e.g. hurricanes and earthquakes);

• the introduction of new or costly treatments, including new technologies;

• medical cost inflation; and

• government mandated benefits or other regulatory changes, including any that result from Health Insurance Reform Legislation.

Key to our operational strategy is the implementation of clinical initiatives that we believe provide a better health care experience for our members, lower these costs, and appropriately document the risk profile of our members. Our profitability and competitiveness depend in large part on our ability to appropriately manage health care costs through, among other things, the application of medical management programs such as our chronic care management program.



In addition, we also estimate costs associated with long-duration insurance policies including life insurance, annuities, health, and long-term care policies sold to individuals for which some of the premium received in the earlier years is intended to pay anticipated benefits to be incurred in future years. These future policy benefit reserves are recognized on a net level premium method based on interest rates, mortality, morbidity, withdrawal and maintenance expense assumptions from published actuarial tables, as modified based upon actual experience. The assumptions used to determine the liability for future policy benefits are established and locked in at the time each contract is acquired and would only change if our expected future experience deteriorated to the point that the level of the liability, together with the present value of future gross premiums, are not adequate to provide for future expected policy benefits. Future policy benefits payable include $1.1 billion at December 31, 2012 associated with a closed block of long-term care policies acquired in connection with the November 30, 2007 KMG America Corporation acquisition. Long-term care policies provide for long-duration coverage and, therefore, our actual claims experience will emerge many years after assumptions have been established. The risk of a deviation of the actual interest rates, morbidity rates, and mortality rates from those assumed in our reserves are particularly significant to our closed block of long-term care policies. We monitor the loss experience of these long-term care policies, and, when necessary, apply for premium rate increases through a regulatory filing and approval process in the jurisdictions in which such products were sold. However, to the extent premium rate increases or loss experience vary from our acquisition date assumptions, additional future adjustments to reserves could be required.

Failure to adequately price our products or estimate sufficient benefits payable or future policy benefits payable may result in a material adverse effect on our results of operations, financial position, and cash flows.

We are in a highly competitive industry. Some of our competitors are more established in the health care industry in terms of a larger market share and have greater financial resources than we do in some markets. In addition, other companies may enter our markets in the future, including emerging competitors in the Medicare program. We believe that barriers to entry in our markets are not substantial, so the addition of new competitors can occur relatively easily, and customers enjoy significant flexibility in moving between competitors. Contracts for the sale of commercial products are generally bid upon or renewed annually. While health plans compete on the basis of many factors, including service and the quality and depth of provider networks, we expect that price will continue to be a significant basis of competition. In addition to the challenge of controlling health care costs, we face intense competitive pressure to contain premium prices. Factors such as business consolidations, strategic alliances, legislative reform, and marketing practices create pressure to contain premium price increases, despite being faced with increasing medical costs.

Premium increases, introduction of new product designs, and our relationships with our providers in various markets, among other issues, could also affect our membership levels. Other actions that could affect membership levels include our possible exit from or entrance into Medicare or commercial markets, or the termination of a large contract.

If we do not compete effectively in our markets, if we set rates too high or too low in highly competitive markets to keep or increase our market share, if membership does not increase as we expect, if membership declines, or if we lose accounts with favorable medical cost experience while retaining or increasing membership in accounts with unfavorable medical cost experience, our results of operations, financial position, and cash flows may be materially adversely affected.

If we fail to effectively implement our operational and strategic initiatives, including our Medicare initiatives, our business may be materially adversely affected, which is of particular importance given the concentration of our revenues in Medicare products.

Our future performance depends in large part upon our management team’s ability to execute our strategy to position us for the future. This strategy includes opportunities created by the expansion of our Medicare programs, including our HMO and PPO products, as well as our stand-alone PDP products and the successful



implementation of our integrated care delivery model. We have made substantial investments in the Medicare program to enhance our ability to participate in these programs. Over the last few years we have increased the size of our Medicare geographic reach through expanded Medicare product offerings. We are offering both the stand-alone Medicare prescription drug coverage and Medicare Advantage health plan with prescription drug coverage in addition to our other product offerings. We offer the Medicare prescription drug plan in 50 states as well as Puerto Rico and the District of Columbia.

The growth of our Medicare products is an important part of our business strategy. Any failure to achieve this growth may have a material adverse effect on our results of operations, financial position, or cash flows. In addition, the expansion of our Medicare products in relation to our other businesses may intensify the risks to us inherent in Medicare products. There is significant concentration of our revenues in Medicare products, with approximately 72% of our total premiums and services revenue in 2012 generated from our Medicare products. These expansion efforts may result in less diversification of our revenue stream and increased risks associated with operating in a highly regulated industry, as discussed further below.

Recently enacted Health Insurance Reform Legislation created a federal Medicare-Medicare Coordination Office to serve dual eligibles. This Medicare-Medicare Coordination Office has initiated a series of state demonstration projects to experiment with better coordination of care between Medicare and Medicaid. Depending upon the results of those demonstration projects, CMS may change the way in which dual eligibles are serviced. If we are unable to implement our strategic initiatives to address the dual eligibles opportunity, or if our initiatives are not successful at attracting or retaining dual eligible members, our business may be materially adversely affected.

Additionally, our strategy includes the growth of our commercial products, such as ASO and individual products, introduction of new products and benefit designs, including HumanaVitality and other wellness products, expansion of our specialty products such as dental, vision and other supplemental products, the adoption of new technologies, development of adjacent businesses, and the integration of acquired businesses and contracts.

There can be no assurance that we will be able to successfully implement our operational and strategic initiatives, including outsourcing certain business functions and implementing our integrated care delivery model, that are intended to position us for future growth or that the products we design will be accepted or adopted in the time periods assumed. Failure to implement this strategy may result in a material adverse effect on our results of operations, financial position, and cash flows.

If we fail to properly maintain the integrity of our data, to strategically implement new information systems, to protect our proprietary rights to our systems, or to defend against cybersecurity attacks, our business may be materially adversely affected.

Our business depends significantly on effective information systems and the integrity and timeliness of the data we use to run our business. Our business strategy involves providing members and providers with easy to use products that leverage our information to meet their needs. Our ability to adequately price our products and services, provide effective and efficient service to our customers, and to timely and accurately report our financial results depends significantly on the integrity of the data in our information systems. As a result of our past and on-going acquisition activities, we have acquired additional information systems. We have reduced the number of systems we operate, have upgraded and expanded our information systems capabilities, and are gradually migrating existing business to fewer systems. Our information systems require an ongoing commitment of significant resources to maintain, protect, and enhance existing systems and develop new systems to keep pace with continuing changes in information processing technology, evolving industry and regulatory standards, and changing customer preferences. If the information we rely upon to run our businesses was found to be inaccurate or unreliable or if we fail to maintain effectively our information systems and data integrity, we could have operational disruptions, have problems in determining medical cost estimates and establishing appropriate



pricing, have customer and physician and other health care provider disputes, have regulatory or other legal problems, have increases in operating expenses, lose existing customers, have difficulty in attracting new customers, or suffer other adverse consequences.

We depend on independent third parties for significant portions of our systems-related support, equipment, facilities, and certain data, including data center operations, data network, voice communication services and pharmacy data processing. This dependence makes our operations vulnerable to such third parties' failure to perform adequately under the contract, due to internal or external factors. A change in service providers could result in a decline in service quality and effectiveness or less favorable contract terms which may adversely affect our operating results.

We rely on our agreements with customers, confidentiality agreements with employees, and our trade secrets and copyrights to protect our proprietary rights. These legal protections and precautions may not prevent misappropriation of our proprietary information. In addition, substantial litigation regarding intellectual property rights exists in the software industry, including litigation involving end users of software products. We expect software products to be increasingly subject to third-party infringement claims as the number of products and competitors in this area grows.

Our business plans also include becoming a quality e-business organization by enhancing interactions with customers, brokers, agents, providers and other stakeholders through web-enabled technology. Our strategy includes sales and distribution of health benefit products through the Internet, and implementation of advanced self-service capabilities, for internal and external stakeholders.

A cybersecurity attack that bypasses our information technology, or IT, security systems causing a security breach may lead to a material disruption of our IT business systems and/or the loss of business information. If a cybersecurity attack were to be successful, we could be materially adversely affected due to the theft, destruction, loss, misappropriation or release of confidential data or intellectual property, operational or business delays resulting from the disruption of our IT systems, or negative publicity resulting in reputation or brand damage with our customers, brokers, agents, providers, and other stakeholders.

There can be no assurance that our IT process will successfully improve existing systems, develop new systems to support our expanding operations, integrate new systems, protect our proprietary information, defend against cybersecurity attacks, or improve service levels. In addition, there can be no assurance that additional systems issues will not arise in the future. Failure to adequately protect and maintain the integrity of our information systems and data, or to defend against cybersecurity attacks, may result in a material adverse effect on our results of operations, financial position, and cash flows.

Our business may be materially adversely impacted by CMS’s adoption of the new coding set for diagnoses.

CMS has adopted a new coding set for diagnoses, commonly known as ICD-10, which significantly expands the number of codes utilized. We may be required to incur significant expenses in implementing the new coding set by the current compliance date of October 1, 2014. If we do not adequately implement the new coding set, our results of operations, financial position and cash flows may be materially adversely affected.

We are involved in various legal actions and governmental and internal investigations, any of which, if resolved unfavorably to us, could result in substantial monetary damages. Increased litigation and negative publicity could increase our cost of doing business.

We are or may become a party to a variety of legal actions that affect our business, including employment and employment discrimination-related suits, employee benefit claims, breach of contract actions, securities laws claims, and tort claims.



In addition, because of the nature of the health care business, we are subject to a variety of legal actions relating to our business operations, including the design, management, and offering of products and services. These include and could include in the future:

• claims relating to the methodologies for calculating premiums;

• claims relating to the denial of health care benefit payments;

• claims relating to the denial or rescission of insurance coverage;

• challenges to the use of some software products used in administering claims;

• claims relating to our administration of our Medicare Part D offerings;

- medical malpractice actions based on our medical necessity decisions or brought against us on the theory that we are liable for providers’ alleged malpractice;

- claims arising from any adverse medical consequences resulting from our recommendations about the appropriateness of providers’ proposed medical treatment plans for patients;

• allegations of anti-competitive and unfair business activities;

• provider disputes over compensation and termination of provider contracts;

• disputes related to ASO business, including actions alleging claim administration errors;

- qui tam litigation brought by individuals who seek to sue on behalf of the government, alleging that we, as a government contractor, submitted false claims to the government including, among other allegations, resulting from coding and review practices under the Medicare risk-adjustment model;

• claims related to the failure to disclose some business practices;

• claims relating to customer audits and contract performance;

• claims relating to dispensing of drugs associated with our in-house mail-order pharmacy; and

• professional liability claims arising out of the delivery of healthcare and related services to the public.

In some cases, substantial non-economic or punitive damages as well as treble damages under the federal False Claims Act, Racketeer Influenced and Corrupt Organizations Act and other statutes may be sought.

While we currently have insurance coverage for some of these potential liabilities, other potential liabilities may not be covered by insurance, insurers may dispute coverage, or the amount of our insurance may not be enough to cover the damages awarded. In addition, some types of damages, like punitive damages, may not be covered by insurance. In some jurisdictions, coverage of punitive damages is prohibited. Insurance coverage for all or some forms of liability may become unavailable or prohibitively expensive in the future.

The health benefits industry continues to receive significant negative publicity reflecting the public perception of the industry. This publicity and perception have been accompanied by increased litigation, including some large jury awards, legislative activity, regulation, and governmental review of industry practices. These factors may adversely affect our ability to market our products or services, may require us to change our products or services, may increase the regulatory burdens under which we operate, and may require us to pay large judgments or fines. Any combination of these factors could further increase our cost of doing business and adversely affect our results of operations, financial position, and cash flows.

See “Legal Proceedings and Certain Regulatory Matters” in Note 15 to the consolidated financial statements included in Item 8. – Financial Statements and Supplementary Data. We cannot predict the outcome of these matters with certainty.



As a government contractor, we are exposed to risks that may materially adversely affect our business or our willingness or ability to participate in government health care programs.

A significant portion of our revenues relates to federal and state government health care coverage programs, including the Medicare, military, and Medicaid programs. These programs accounted for approximately 78% of our total premiums and services revenue for the year ended December 31, 2012. These programs involve various risks, as described further below.

- At December 31, 2012, under our contracts with CMS we provided health insurance coverage to approximately 384,200 Medicare Advantage members in Florida. These contracts accounted for approximately 15% of our total premiums and services revenue for the year ended December 31, 2012. The loss of these and other CMS contracts or significant changes in the Medicare program as a result of legislative or regulatory action, including reductions in premium payments to us or increases in member benefits without corresponding increases in premium payments to us, may have a material adverse effect on our results of operations, financial position, and cash flows.

- At December 31, 2012, our military services business primarily consisted of the TRICARE South Region contract which covers approximately 3,123,900 beneficiaries. For the year ended December 31, 2012, premiums and services revenue associated with the TRICARE South Region contract accounted for approximately 3% of our total premiums and services revenue. On April 1, 2012, we began delivering services under the new TRICARE South Region contract that the Department of Defense TRICARE Management Activity, or TMA, awarded to us on February 25, 2011. The new 5-year South Region contract, which expires March 31, 2017, is subject to annual renewals on April 1 of each year during its term at the government's option. The TMA has notified us of its intent to exercise its option to extend the TRICARE South Region contract through March 31, 2014. The loss of the TRICARE South Region contract may have a material adverse effect on our results of operations, financial position, and cash flows.

- At December 31, 2012, under our contracts with the Puerto Rico Health Insurance Administration, or PRHIA, we provided health insurance coverage to approximately 531,500 Medicaid members in Puerto Rico. These contracts accounted for approximately 2% of our total premiums and services revenue for the year ended December 31, 2012. Effective October 1, 2010, as amended in May 2011, the PRHIA awarded us three contracts for the East, Southeast, and Southwest regions for a three-year term through June 30, 2013. The loss of these contracts or significant changes in the Puerto Rico Medicaid program as a result of legislative action, including reductions in premium payments to us, or increases in member benefits without corresponding increases in premium payments to us may have a material adverse effect on our results of operations, financial position, and cash flows.

- There is a possibility of temporary or permanent suspension from participating in government health care programs, including Medicare and Medicaid, if we are convicted of fraud or other criminal conduct in the performance of a health care program or if there is an adverse decision against us under the federal False Claims Act. As a government contractor, we may be subject to qui tam litigation brought by individuals who seek to sue on behalf of the government, alleging that the government contractor submitted false claims to the government. Litigation of this nature is filed under seal to allow the government an opportunity to investigate and to decide if it wishes to intervene and assume control of the litigation. If the government does not intervene, the lawsuit is unsealed, and the individual may continue to prosecute the action on his or her own.

- CMS uses a risk-adjustment model which appropriates premiums paid to Medicare Advantage, or MA, plans according to health severity. The risk-adjustment model pays more for enrollees with predictably higher costs. Under this model, rates paid to MA plans are based on actuarially determined bids, which include a process that bases our prospective payments on a comparison of our beneficiaries' risk scores, derived from medical diagnoses, to those enrolled in the government's original Medicare program. Under the risk-adjustment methodology, all MA plans must collect and submit the necessary diagnosis code information from hospital inpatient, hospital outpatient, and physician providers to



CMS within prescribed deadlines. The CMS risk-adjustment model uses this diagnosis data to calculate the risk-adjusted premium payment to MA plans. We generally rely on providers, including certain providers in our network who are our employees, to code their claim submissions with appropriate diagnoses, which we send to CMS as the basis for our payment received from CMS under the actuarial risk-adjustment model. We also rely on providers to appropriately document all medical data, including the diagnosis data submitted with claims.

CMS is continuing to perform audits of various companies’ selected MA contracts related to this risk adjustment diagnosis data. These audits are referred to herein as Risk-Adjustment Data Validation Audits, or RADV audits. RADV audits review medical records in an attempt to validate provider medical record documentation and coding practices which influence the calculation of premium payments to MA plans.

On February 24, 2012, CMS released a “Notice of Final Payment Error Calculation Methodology for Part C Medicare Advantage Risk Adjustment Data Validation (RADV) Contract-Level Audits”. The final payment error calculation methodology provides that, in calculating the economic impact of audit results for an MA contract, if any, the results of the audit sample will be extrapolated to the entire MA contract based upon a comparison to “benchmark” audit data in the government fee-for-service program. This comparison to the government program benchmark audit is necessary to determine the economic impact, if any, of audit results because the government program data set, including any attendant errors that are present in that data set, provides the basis for MA plans’ risk adjustment to payment rates.

The final methodology, including the first application of extrapolated audit results to determine audit settlements, is expected to be applied to the next round of RADV contract level audits to be conducted on 2011 premium payments. Selected MA contracts will be notified of an audit at some point after the close of the final reconciliation for the payment year being audited. The final reconciliation occurs in August of the calendar year following the payment year.

Estimated audit settlements are recorded as a reduction of premiums revenue in our consolidated statements of income, based upon available information. During 2012, we completed internal contract level audits of certain contracts based on the RADV audit methodology prescribed by CMS. Included in these internal contract level audits was an audit of our Private Fee-For-Service business which we used to represent a proxy of the benchmark audit data in the government fee-for-service program which has not yet been released. We based our accrual of estimated audit settlements for contract years 2011 (the first year that application of extrapolated audit results is applicable) and 2012 on the results of these internal contract level audits. Estimates derived from these results were not material to our results of operations, financial position, or cash flows. However, as indicated, we are awaiting additional guidance from CMS regarding the benchmark audit data in the government fee-for-service program and the identification of our specific MA contracts that will be selected for audit. Accordingly, we cannot determine whether such audits will have a material adverse effect on our results of operations, financial position, or cash flows.

- Our CMS contracts which cover members’ prescription drugs under Medicare Part D contain provisions for risk sharing and certain payments for prescription drug costs for which we are not at risk. These provisions, certain of which are described below, affect our ultimate payments from CMS.

The premiums from CMS are subject to risk corridor provisions which compare costs targeted in our annual bids to actual prescription drug costs, limited to actual costs that would have been incurred under the standard coverage as defined by CMS. Variances exceeding certain thresholds may result in CMS making additional payments to us or require us to refund to CMS a portion of the premiums we received (known as a "risk corridor"). We estimate and recognize an adjustment to premiums revenue related to the risk corridor payment settlement based upon pharmacy claims experience. The estimate of the settlement associated with these risk corridor provisions requires us to consider factors that may not be certain, including member eligibility differences with CMS. Our estimate of the settlement associated with the Medicare Part D risk corridor provisions was a net payable of $356 million at December 31, 2012.



Reinsurance and low-income cost subsidies represent payments from CMS in connection with the Medicare Part D program for which we assume no risk. Reinsurance subsidies represent payments for CMS’s portion of claims costs which exceed the member’s out-of-pocket threshold, or the catastrophic coverage level. Low-income cost subsidies represent payments from CMS for all or a portion of the deductible, the coinsurance and co-payment amounts above the out-of-pocket threshold for low-income beneficiaries. Monthly prospective payments from CMS for reinsurance and low-income cost subsidies are based on assumptions submitted with our annual bid. A reconciliation and settlement of CMS’s prospective subsidies against actual prescription drug costs we paid is made after the end of the year.

Settlement of the reinsurance and low-income cost subsidies as well as the risk corridor payment is based on a reconciliation made approximately 9 months after the close of each calendar year. This reconciliation process requires us to submit claims data necessary for CMS to administer the program. Our claims data may not pass CMS’s claims edit processes due to various reasons, including discrepancies in eligibility or classification of low-income members. To the extent our data does not pass CMS’s claim edit processes, we may bear the risk for all or a portion of the claim which otherwise may have been subject to the risk corridor provision or payment which we would have otherwise received as a low-income or reinsurance claim. In addition, in the event the settlement represents an amount CMS owes us, there is a negative impact on our cash flows and financial condition as a result of financing CMS’s share of the risk. The opposite is true in the event the settlement represents an amount we owe CMS.

- The Budget Control Act of 2011, enacted on August 2, 2011, increased the United States debt ceiling conditioned on deficit reductions to be achieved over the next ten years. The Budget Control Act of 2011 also established a twelve-member joint committee of Congress known as the Joint Select Committee on Deficit Reduction to propose legislation to reduce the United States federal deficit by $1.5 trillion for fiscal years 2012-2021. The failure of the Joint Select Committee on Deficit Reduction to achieve a targeted deficit reduction by December 23, 2011 triggered an automatic reduction, including aggregate reductions to Medicare payments to providers of up to 2 percent per fiscal year. Although these reductions are scheduled to take effect on March 1, 2013, at this time it is unclear how this automatic reduction may be applied to various Medicare healthcare programs or the timing of when such reductions may actually begin. We expect that if such reductions were to occur, there would be a corresponding substantial reduction in our obligations to providers. Due to the uncertainty around the timing or application of any such reductions, there can be no assurances that we could completely offset any reductions to the Medicare healthcare programs applied by the Budget Control Act of 2011.

- We are also subject to various other governmental audits and investigations. Under state laws, our HMOs and health insurance companies are audited by state departments of insurance for financial and contractual compliance. Our HMOs are audited for compliance with health services by state departments of health. Audits and investigations are also conducted by state attorneys general, CMS, the Office of the Inspector General of Health and Human Services, the Office of Personnel Management, the Department of Justice, the Department of Labor, and the Defense Contract Audit Agency. All of these activities could result in the loss of licensure or the right to participate in various programs, including a limitation on our ability to market or sell products, the imposition of fines, penalties and other civil and criminal sanctions, or changes in our business practices. The outcome of any current or future governmental or internal investigations cannot be accurately predicted, nor can we predict any resulting penalties, fines or other sanctions that may be imposed at the discretion of federal or state regulatory authorities. Nevertheless, it is reasonably possible that any such outcome of litigation, penalties, fines or other sanctions could be substantial, and the outcome of these matters may have a material adverse effect on our results of operations, financial position, and cash flows. Certain of these matters could also affect our reputation. In addition, disclosure of any adverse investigation or audit results or sanctions could negatively affect our industry or our reputation in various markets and make it more difficult for us to sell our products and services.



Recently enacted health insurance reform, including The Patient Protection and Affordable Care Act and The Health Care and Education Reconciliation Act of 2010, could have a material adverse effect on our results of operations, including restricting revenue, enrollment and premium growth in certain products and market segments, restricting our ability to expand into new markets, increasing our medical and operating costs by, among other things, requiring a minimum benefit ratio on insured products (and particularly how the ratio may apply to Medicare plans), lowering our Medicare payment rates and increasing our expenses associated with a non-deductible federal premium tax and other assessments; financial position, including our ability to maintain the value of our goodwill; and cash flows. In addition, if the new non-deductible federal premium tax and other assessments, including a three-year commercial reinsurance fee, were imposed as enacted, and if we are unable to adjust our business model to address these new taxes and assessments, such as through the reduction of our operating costs or adjustments to premium pricing or benefit design, there can be no assurance that the non-deductible federal premium tax and other assessments would not have a material adverse effect on our results of operations, financial position, and cash flows.

In March 2010, the President signed into law The Patient Protection and Affordable Care Act and The Health Care and Education Reconciliation Act of 2010 (which we collectively refer to as the Health Insurance Reform Legislation) which enact significant reforms to various aspects of the U.S. health insurance industry. While regulations and interpretive guidance on some provisions of the Health Insurance Reform Legislation have been issued to date by the Department of Health and Human Services, or HHS, the Department of Labor, the Treasury Department, and the National Association of Insurance Commissioners, there are many provisions of the legislation that will require additional guidance and clarification in the form of regulations and interpretations in order to fully understand the impacts of the legislation on our overall business, which we expect to occur over the next several years.

The provisions of the Health Insurance Reform Legislation include, among others, imposing significant new non-deductible federal premium taxes and other assessments on health insurers, limiting Medicare Advantage payment rates, stipulating a prescribed minimum ratio for the amount of premiums revenue to be expended on medical costs for insured products (and particularly how the ratio may apply to Medicare Advantage and prescription drug plans), additional mandated benefits and guarantee issuance associated with commercial medical insurance, requirements that limit the ability of health plans to vary premiums based on assessments of underlying risk, and heightened scrutiny by state and federal regulators of our business practices, including our Medicare bid and pricing practices. The Health Insurance Reform Legislation also specifies benefit design guidelines, limits rating and pricing practices, encourages additional competition (including potential incentives for new market entrants), establishes federally-facilitated or state-based exchanges for individuals and small employers (with up to 100 employees) coupled with programs designed to spread risk among insurers, and expands eligibility for Medicaid programs. In addition, the law will increase federal oversight of health plan premium rates and could adversely affect our ability to appropriately adjust health plan premiums on a timely basis. Financing for these reforms will come, in part, from material additional fees and taxes on us and other health plans and individuals beginning in 2014, as well as reductions in certain levels of payments to us and other health plans under Medicare. Implementation dates of the provisions of the Health Insurance Reform Legislation began in September 2010 and continue through 2018.

Implementing regulations and related interpretive guidance continue to be issued on several significant provisions of the Health Insurance Reform Legislation. Congress may also withhold the funding necessary to implement the Health Insurance Reform Legislation, or may attempt to replace the legislation with amended provisions. Given the breadth of possible changes and the uncertainties of interpretation, implementation, and timing of these changes, which we expect to occur over the next several years, the Health Insurance Reform Legislation will change the way we do business, potentially impacting our pricing, benefit design, product mix, geographic mix, and distribution channels. In particular, implementing regulations and related guidance are forthcoming on various aspects of the minimum benefit ratio requirement's applicability to Medicare, including aggregation, credibility thresholds, and its application to prescription drug plans. The response of other companies to Health Insurance Reform Legislation and adjustments to their offerings, if any, could cause meaningful disruption in the local health care markets. It is reasonably possible that the Health Insurance Reform



Legislation and related regulations, as well as future legislative changes, in the aggregate may have a material adverse effect on our results of operations, including restricting revenue, enrollment and premium growth in certain products and market segments, restricting our ability to expand into new markets, increasing our medical and operating costs, lowering our Medicare payment rates and increasing our expenses associated with the non-deductible federal premium tax and other assessments; our financial position, including our ability to maintain the value of our goodwill; and our cash flows. If we fail to effectively implement our operational and strategic initiatives with respect to the implementation of the Health Insurance Reform Legislation, our business may be materially adversely affected. In addition, if the new non-deductible federal premium tax and other assessments, including a three-year commercial reinsurance fee, were imposed as enacted, and if we are unable to adjust our business model to address these new taxes and assessments, such as through the reduction of our operating costs or adjustments to premium pricing or benefit design, there can be no assurance that the non-deductible federal premium tax and other assessments would not have a material adverse effect on our results of operations, financial position, and cash flows.

Our business activities are subject to substantial government regulation. New laws or regulations, or changes in existing laws or regulations or their manner of application, including reductions in Medicare Advantage payment rates, could increase our cost of doing business and may adversely affect our business, profitability, financial condition, and cash flows.

In addition to the Health Insurance Reform Legislation, the health care industry in general and health insurance are subject to substantial federal and state government regulation:

## Health Insurance Portability and Accountability Act (HIPAA) and the Health Information Technology for Economic and Clinical Health Act (HITECH Act)

The use of individually identifiable health data by our business is regulated at federal and state levels. These laws and rules are changed frequently by legislation or administrative interpretation. Various state laws address the use and maintenance of individually identifiable health data. Most are derived from the privacy provisions in the federal Gramm-Leach-Bliley Act and the Health Insurance Portability and Accountability Act, or HIPAA. HIPAA includes administrative provisions directed at simplifying electronic data interchange through standardizing transactions, establishing uniform health care provider, payer, and employer identifiers, and seeking protections for confidentiality and security of patient data. The rules do not provide for complete federal preemption of state laws, but rather preempt all inconsistent state laws unless the state law is more stringent.

These regulations set standards for the security of electronic health information. Violations of these rules could subject us to significant criminal and civil penalties, including significant monetary penalties. Compliance with HIPAA regulations requires significant systems enhancements, training and administrative effort. HIPAA can also expose us to additional liability for violations by our business associates (e.g., entities that provide services to health plans).

The HITECH Act, one part of the American Recovery and Reinvestment Act of 2009, significantly broadened the scope of the privacy and security regulations of HIPAA. Among other requirements, the HITECH Act mandates individual notification in the event of a breach of unsecured, individually identifiable health information, provides enhanced penalties for HIPAA violations, requires business associates to comply with certain provisions of the HIPAA privacy and security rule, and grants enforcement authority to states' Attorneys General in addition to the HHS Office of Civil Rights. On January 17, 2013, HHS issued the omnibus final rule on HIPAA privacy, security, breach notification requirements and enforcement requirements under the HITECH Act, and a final regulation for required changes to the HIPAA Privacy Rule for the Genetic Information Nondiscrimination Act, or GINA. The omnibus final rule becomes effective on March 26, 2013, with an applicable compliance date of September 23, 2013.

In addition, there are numerous federal and state laws and regulations addressing patient and consumer privacy concerns, including unauthorized access or theft of personal information. State statutes and regulations



vary from state to state and could impose additional penalties. Violations of HIPAA or applicable federal or state laws or regulations could subject us to significant criminal or civil penalties, including significant monetary penalties. Compliance with HIPAA and other privacy regulations requires significant systems enhancements, training and administrative effort.

## American Recovery and Reinvestment Act of 2009 (ARRA)

On February 17, 2009, the American Recovery and Reinvestment Act of 2009, or ARRA, was enacted into law. In addition to including a temporary subsidy for health care continuation coverage issued pursuant to the Consolidated Omnibus Budget Reconciliation Act, or COBRA, ARRA also expands and strengthens the privacy and security provisions of HIPAA and imposes additional limits on the use and disclosure of protected health information, or PHI. Among other things, ARRA requires us and other covered entities to report any unauthorized release or use of or access to PHI to any impacted individuals and to the U.S. Department of Health and Human Services in those instances where the unauthorized activity poses a significant risk of financial, reputational or other harm to the individuals, and to notify the media in any states where 500 or more people are impacted by any unauthorized release or use of or access to PHI. ARRA also requires business associates to comply with certain HIPAA provisions. ARRA also establishes higher civil and criminal penalties for covered entities and business associates who fail to comply with HIPAA’s provisions and requires the U.S. Department of Health and Human Services to issue regulations implementing its privacy and security enhancements.

## Workers’ Compensation Laws and Regulations

In performing services for the workers’ compensation industry through our subsidiary Concentra Inc., we must comply with applicable state workers’ compensation laws. Workers’ compensation laws generally require employers to assume financial responsibility for medical costs, lost wages, and related legal costs of work-related illnesses and injuries. These laws generally establish the rights of workers to receive benefits and to appeal benefit denials, prohibit charging medical co-payments or deductibles to employees, may restrict employers’ rights to select healthcare providers or direct an injured employee to a specific provider to receive non-emergency workers’ compensation medical care, and may include special requirements for physicians providing non-emergency care for workers’ compensation patients, including requiring registration with the state agency governing workers’ compensation, as well as special continuing education and training, licensing and other regulatory requirements. To the extent that we are governed by these regulations, we may be subject to additional licensing requirements, financial oversight, and procedural standards for beneficiaries and providers.

## Corporate Practice of Medicine and Other Laws

As a corporate entity, Humana Inc. is not licensed to practice medicine. Many states in which we operate through our subsidiaries limit the practice of medicine to licensed individuals or professional organizations comprised of licensed individuals, and business corporations generally may not exercise control over the medical decisions of physicians. Statutes and regulations relating to the practice of medicine, fee-splitting between physicians and referral sources, and similar issues vary widely from state to state. Under management agreements between Concentra and its affiliated physician-owned professional groups, these groups retain sole responsibility for all medical decisions, as well as for hiring and managing physicians and other licensed healthcare providers, developing operating policies and procedures, implementing professional standards and controls, and maintaining malpractice insurance. We believe that our health services operations comply with applicable state statutes regarding corporate practice of medicine, fee-splitting, and similar issues. However, any enforcement actions by governmental officials alleging non-compliance with these statutes, which could subject us to penalties or restructuring or reorganization of our business, may result in a material adverse effect on our results of operations, financial position, or cash flows.

## Anti-Kickback, Physician Self-Referral, and Other Fraud and Abuse Laws

A federal law commonly referred to as the “Anti-Kickback Statute” prohibits the offer, payment, solicitation, or receipt of any form of remuneration to induce, or in return for, the referral of Medicare or other



governmental health program patients or patient care opportunities, or in return for the purchase, lease, or order of items or services that are covered by Medicare or other federal governmental health programs. Because the prohibitions contained in the Anti-Kickback Statute apply to the furnishing of items or services for which payment is made in “whole or in part,” the Anti-Kickback Statute could be implicated if any portion of an item or service we provide is covered by any of the state or federal health benefit programs described above. Violation of these provisions constitutes a felony criminal offense and applicable sanctions could include exclusion from the Medicare and Medicaid programs.

Section 1877 of the Social Security Act, commonly known as the “Stark Law,” prohibits physicians, subject to certain exceptions described below, from referring Medicare or Medicaid patients to an entity providing “designated health services” in which the physician, or an immediate family member, has an ownership or investment interest or with which the physician, or an immediate family member, has entered into a compensation arrangement. These prohibitions, contained in the Omnibus Budget Reconciliation Act of 1993, commonly known as “Stark II,” amended prior federal physician self-referral legislation known as “Stark I” by expanding the list of designated health services to a total of 11 categories of health services. The professional groups with which we are affiliated provide one or more of these designated health services. Persons or entities found to be in violation of the Stark Law are subject to denial of payment for services furnished pursuant to an improper referral, civil monetary penalties, and exclusion from the Medicare and Medicaid programs.

Many states also have enacted laws similar in scope and purpose to the Anti-Kickback Statute and, in more limited instances, the Stark Law, that are not limited to services for which Medicare or Medicaid payment is made. In addition, most states have statutes, regulations, or professional codes that restrict a physician from accepting various kinds of remuneration in exchange for making referrals. These laws vary from state to state and have seldom been interpreted by the courts or regulatory agencies. In states that have enacted these statutes, we believe that regulatory authorities and state courts interpreting these statutes may regard federal law under the Anti-Kickback Statute and the Stark Law as persuasive.

We believe that our operations comply with the Anti-Kickback Statute, the Stark Law, and similar federal or state laws addressing fraud and abuse. These laws are subject to modification and changes in interpretation, and are enforced by authorities vested with broad discretion. We continually monitor developments in this area. If these laws are interpreted in a manner contrary to our interpretation or are reinterpreted or amended, or if new legislation is enacted with respect to healthcare fraud and abuse, illegal remuneration, or similar issues, we may be required to restructure our affected operations to maintain compliance with applicable law. There can be no assurances that any such restructuring will be possible or, if possible, would not have a material adverse effect on our results of operations, financial position, or cash flows.

## Environmental

We are subject to various federal, state, and local laws and regulations relating to the protection of human health and the environment. If an environmental regulatory agency finds any of our facilities to be in violation of environmental laws, penalties and fines may be imposed for each day of violation and the affected facility could be forced to cease operations. We could also incur other significant costs, such as cleanup costs or claims by third parties, as a result of violations of, or liabilities under, environmental laws. Although we believe that our environmental practices, including waste handling and disposal practices, are in material compliance with applicable laws, future claims or violations, or changes in environmental laws, could have a material adverse effect on our results of operations, financial position or cash flows.

## State Regulation of Insurance-Related Products

Laws in each of the states (and Puerto Rico) in which we operate our HMOs, PPOs and other health insurance-related services regulate our operations including: licensing requirements, policy language describing benefits, mandated benefits and processes, entry, withdrawal or re-entry into a state or market, rate increases,



delivery systems, utilization review procedures, quality assurance, complaint systems, enrollment requirements, claim payments, marketing, and advertising. The HMO, PPO, and other health insurance-related products we offer are sold under licenses issued by the applicable insurance regulators.

Our licensed subsidiaries are also subject to regulation under state insurance holding company and Puerto Rico regulations. These regulations generally require, among other things, prior approval and/or notice of new products, rates, benefit changes, and certain material transactions, including dividend payments, purchases or sales of assets, intercompany agreements, and the filing of various financial and operational reports.

Certain of our subsidiaries operate in states that regulate the payment of dividends, loans, or other cash transfers to Humana Inc., our parent company, and require minimum levels of equity as well as limit investments to approved securities. The amount of dividends that may be paid to Humana Inc. by these subsidiaries, without prior approval by state regulatory authorities, or ordinary dividends, is limited based on the entity’s level of statutory income and statutory capital and surplus. In most states, prior notification is provided before paying a dividend even if approval is not required. Actual dividends paid may vary due to consideration of excess statutory capital and surplus and expected future surplus requirements related to, for example, premium volume and product mix.

Although minimum required levels of equity are largely based on premium volume, product mix, and the quality of assets held, minimum requirements vary significantly at the state level. Our state regulated subsidiaries had aggregate statutory capital and surplus of approximately $5.1 billion and $4.7 billion as of December 31, 2012 and 2011, respectively, which exceeded aggregate minimum regulatory requirements. Excluding Puerto Rico subsidiaries, the amount of ordinary dividends that may be paid to our parent company in 2013 is approximately $911 million in the aggregate. This compares to ordinary dividends that were able to be paid in 2012 of approximately $860 million. We expect the amount of dividends to be paid to our parent company in 2013 to approximate the amount of ordinary dividends.

## Any failure to manage operating costs could hamper profitability.

The level of our operating costs impacts our profitability. While we proactively attempt to effectively manage such expenses, increases or decreases in staff-related expenses, additional investment in new products (including our opportunities in the Medicare programs and expansion of clinical capabilities a part of our integrated care delivery model), greater emphasis on small group and individual health insurance products, investments in health and well-being product offerings, expansion into new specialty markets, acquisitions, new taxes and assessments, including the new non-deductible federal premium tax and other assessments under Health Insurance Reform Legislation, such as the three-year commercial reinsurance fee, and implementation of regulatory requirements may occur from time to time.

There can be no assurance that we will be able to successfully contain our operating costs in line with our membership and this may result in a material adverse effect on our results of operations, financial position, and cash flows.

Any failure by us to manage acquisitions and other significant transactions successfully may have a material adverse effect on our results of operations, financial position, and cash flows.

As part of our business strategy, we frequently engage in discussions with third parties regarding possible investments, acquisitions, strategic alliances, joint ventures, and outsourcing transactions and often enter into agreements relating to such transactions in order to further our business objectives. In order to pursue this strategy successfully, we must identify suitable candidates for and successfully complete transactions, some of which may be large and complex, and manage post-closing issues such as the integration of acquired companies or employees. Integration and other risks can be more pronounced for larger and more complicated transactions, transactions outside of our core business space, or if multiple transactions are pursued simultaneously. The



failure to successfully integrate acquired entities and businesses or failure to produce results consistent with the financial model used in the analysis of our acquisitions may have a material adverse effect on our results of operations, financial position, and cash flows. If we fail to identify and complete successfully transactions that further our strategic objectives, we may be required to expend resources to develop products and technology internally. We may also be at a competitive disadvantage or we may be adversely affected by negative market perceptions, any of which may have a material adverse effect on our results of operations, financial position, and cash flows.

If we fail to develop and maintain satisfactory relationships with the providers of care to our members, our business may be adversely affected.

We own or contract with physicians, hospitals and other providers to deliver health care to our members. Our products encourage or require our customers to use these contracted providers. These providers may share medical cost risk with us or have financial incentives to deliver quality medical services in a cost-effective manner.

In any particular market, providers could refuse to contract with us, demand higher payments, or take other actions that could result in higher health care costs for us, less desirable products for customers and members or difficulty meeting regulatory or accreditation requirements. In some markets, some providers, particularly hospitals, physician specialty groups, physician/hospital organizations, or multi-specialty physician groups, may have significant market positions and negotiating power. In addition, physician or practice management companies, which aggregate physician practices for administrative efficiency and marketing leverage, may compete directly with us. If these providers refuse to contract with us, use their market position to negotiate favorable contracts or place us at a competitive disadvantage, our ability to market products or to be profitable in those areas may be adversely affected.

In some situations, we have contracts with individual or groups of primary care providers for an actuarially determined, fixed, per-member-per-month fee under which physicians are paid an amount to provide all required medical services to our members. This type of contract is referred to as a “capitation” contract. The inability of providers to properly manage costs under these capitation arrangements can result in the financial instability of these providers and the termination of their relationship with us. In addition, payment or other disputes between a primary care provider and specialists with whom the primary care provider contracts can result in a disruption in the provision of services to our members or a reduction in the services available to our members. The financial instability or failure of a primary care provider to pay other providers for services rendered could lead those other providers to demand payment from us even though we have made our regular fixed payments to the primary provider. There can be no assurance that providers with whom we contract will properly manage the costs of services, maintain financial solvency or avoid disputes with other providers. Any of these events may have a material adverse effect on the provision of services to our members and our results of operations, financial position, and cash flows.

Our pharmacy business is highly competitive and subjects us to regulations in addition to those we face with our core health benefits businesses.

Our pharmacy business competes with locally owned drugstores, retail drugstore chains, supermarkets, discount retailers, membership clubs, and Internet companies as well as other mail-order and long-term care pharmacies. Our pharmacy business also subjects us to extensive federal, state, and local regulation. The practice of pharmacy is generally regulated at the state level by state boards of pharmacy. Many of the states where we deliver pharmaceuticals, including controlled substances, have laws and regulations that require out-of-state mail-order pharmacies to register with that state’s board of pharmacy. In addition, some states have proposed laws to regulate online pharmacies, and we may be subject to this legislation if it is passed. Federal agencies further regulate our pharmacy operations. Pharmacies must register with the U.S. Drug Enforcement Administration and individual state controlled substance authorities in order to dispense controlled substances. In



addition, the FDA inspects facilities in connection with procedures to effect recalls of prescription drugs. The Federal Trade Commission also has requirements for mail-order sellers of goods. The U.S. Postal Service, or USPS, has statutory authority to restrict the transmission of drugs and medicines through the mail to a degree that may have an adverse effect on our mail-order operations. The USPS historically has exercised this statutory authority only with respect to controlled substances. If the USPS restricts our ability to deliver drugs through the mail, alternative means of delivery are available to us. However, alternative means of delivery could be significantly more expensive. The Department of Transportation has regulatory authority to impose restrictions on drugs inserted in the stream of commerce. These regulations generally do not apply to the USPS and its operations. In addition, we are subject to CMS rules regarding the administration of our PDP plans and intercompany pricing between our PDP plans and our pharmacy business.

We are also subject to risks inherent in the packaging and distribution of pharmaceuticals and other health care products, and the application of state laws related to the operation of internet and mail-order pharmacies. The failure to adhere to these laws and regulations may expose us to civil and criminal penalties.

Changes in the prescription drug industry pricing benchmarks may adversely affect our financial performance.

Contracts in the prescription drug industry generally use certain published benchmarks to establish pricing for prescription drugs. These benchmarks include average wholesale price, which is referred to as “AWP,” average selling price, which is referred to as “ASP,” and wholesale acquisition cost. Recent events have raised uncertainties as to whether payors, pharmacy providers, pharmacy benefit managers, or PBMs, and others in the prescription drug industry will continue to utilize AWP as it has previously been calculated, or whether other pricing benchmarks will be adopted for establishing prices within the industry. Legislation may lead to changes in the pricing for Medicare and Medicaid programs. Regulators have conducted investigations into the use of AWP for federal program payment, and whether the use of AWP has inflated drug expenditures by the Medicare and Medicaid programs. Federal and state proposals have sought to change the basis for calculating payment of certain drugs by the Medicare and Medicaid programs. Adoption of ASP in lieu of AWP as the measure for determining payment by Medicare or Medicaid programs for the drugs sold in our mail-order pharmacy business may reduce the revenues and gross margins of this business which may result in a material adverse effect on our results of operations, financial position, and cash flows.

If we do not continue to earn and retain purchase discounts and volume rebates from pharmaceutical manufacturers at current levels, our gross margins may decline.

We have contractual relationships with pharmaceutical manufacturers or wholesalers that provide us with purchase discounts and volume rebates on certain prescription drugs dispensed through our mail-order and specialty pharmacies. These discounts and volume rebates are generally passed on to clients in the form of steeper price discounts. Changes in existing federal or state laws or regulations or in their interpretation by courts and agencies or the adoption of new laws or regulations relating to patent term extensions, and purchase discount and volume rebate arrangements with pharmaceutical manufacturers, may reduce the discounts or volume rebates we receive and materially adversely impact our results of operations, financial position, and cash flows.

## Our ability to obtain funds from our subsidiaries is restricted.

Because we operate as a holding company, we are dependent upon dividends and administrative expense reimbursements from our subsidiaries to fund the obligations of Humana Inc., our parent company. These subsidiaries generally are regulated by states' Departments of Insurance. We are also required by law to maintain specific prescribed minimum amounts of capital in these subsidiaries. The levels of capitalization required depend primarily upon the volume of premium generated. A significant increase in premium volume will require additional capitalization from our parent company. In most states, we are required to seek prior approval by these state regulatory authorities before we transfer money or pay dividends from these subsidiaries that exceed



specified amounts, or, in some states, any amount. In addition, we normally notify the state Departments of Insurance prior to making payments that do not require approval. In the event that we are unable to provide sufficient capital to fund the obligations of Humana Inc., our results of operations, financial position, and cash flows may be materially adversely affected.

Downgrades in our debt ratings, should they occur, may adversely affect our business, results of operations, and financial condition.

Claims paying ability, financial strength, and debt ratings by recognized rating organizations are an increasingly important factor in establishing the competitive position of insurance companies. Ratings information is broadly disseminated and generally used throughout the industry. We believe our claims paying ability and financial strength ratings are an important factor in marketing our products to certain of our customers. Our 7.20%, 8.15%, 3.15%, and 4.625% senior notes contain a change of control provision that may require us to purchase the notes under certain circumstances. Our 7.20% and 8.15% senior notes are subject to an interest rate adjustment if the debt ratings assigned to the notes are downgraded (or subsequently upgraded). In addition, our debt ratings impact both the cost and availability of future borrowings. Each of the rating agencies reviews its ratings periodically and there can be no assurance that current ratings will be maintained in the future. Our ratings reflect each rating agency's opinion of our financial strength, operating performance, and ability to meet our debt obligations or obligations to policyholders, but are not evaluations directed toward the protection of investors in our common stock and should not be relied upon as such.

Historically, rating agencies take action to lower ratings due to, among other things, perceived concerns about liquidity or solvency, the competitive environment in the insurance industry, the inherent uncertainty in determining reserves for future claims, the outcome of pending litigation and regulatory investigations, and possible changes in the methodology or criteria applied by the rating agencies. In addition, rating agencies have come under recent regulatory and public scrutiny over the ratings assigned to various fixed-income products. As a result, rating agencies may (i) become more conservative in their methodology and criteria, (ii) increase the frequency or scope of their credit reviews, (iii) request additional information from the companies that they rate, or (iv) adjust upward the capital and other requirements employed in the rating agency models for maintenance of certain ratings levels.

We believe that some of our customers place importance on our credit ratings, and we may lose customers and compete less successfully if our ratings were to be downgraded. In addition, our credit ratings affect our ability to obtain investment capital on favorable terms. If our credit ratings were to be lowered, our cost of borrowing likely would increase, our sales and earnings could decrease, and our results of operations, financial position, and cash flows may be materially adversely affected.

Changes in economic conditions may adversely affect our results of operations, financial position, and cash flows.

The U.S. economy continues to experience a period of slow economic growth and high unemployment. We have closely monitored the impact that this volatile economy is having on our operations. Workforce reductions have caused corresponding membership losses in our fully-insured commercial group business. Continued weakness in the U.S. economy, and any continued high unemployment, may materially adversely affect our medical membership, results of operations, financial position, and cash flows.

Additionally, the continued weakness of the U.S. economy has adversely affected the budget of individual states and of the federal government. This could result in attempts to reduce payments in our federal and state government health care coverage programs, including the Medicare, military services, and Medicaid programs, and could result in an increase in taxes and assessments on our activities. Although we could attempt to mitigate or cover our exposure from such increased costs through, among other things, increases in premiums, there can be no assurance that we will be able to mitigate or cover all of such costs which may have a material adverse effect on our results of operations, financial position, and cash flows.



In addition, general inflationary pressures may affect the costs of medical and other care, increasing the costs of claims expenses submitted to us.

The securities and credit markets may experience volatility and disruption, which may adversely affect our business.

Volatility or disruption in the securities and credit markets could impact our investment portfolio. We evaluate our investment securities for impairment on a quarterly basis. This review is subjective and requires a high degree of judgment. For the purpose of determining gross realized gains and losses, the cost of investment securities sold is based upon specific identification. For debt securities held, we recognize an impairment loss in income when the fair value of the debt security is less than the carrying value and we have the intent to sell the debt security or it is more likely than not that we will be required to sell the debt security before recovery of our amortized cost basis, or if a credit loss has occurred. When we do not intend to sell a security in an unrealized loss position, potential other-than-temporary impairments are considered using variety of factors, including the length of time and extent to which the fair value has been less than cost; adverse conditions specifically related to the industry, geographic area or financial condition of the issuer or underlying collateral of a security; payment structure of the security; changes in credit rating of the security by the rating agencies; the volatility of the fair value changes; and changes in fair value of the security after the balance sheet date. For debt securities, we take into account expectations of relevant market and economic data. We continuously review our investment portfolios and there is a continuing risk that declines in fair value may occur and additional material realized losses from sales or other-than-temporary impairments may be recorded in future periods.

Certain European Union member states have total fiscal obligations greater than their respective gross domestic products. This imbalance has caused investor concern over such countries' ability to continue to service their debt and foster economic growth. Currently, the European debt crisis has caused credit spreads to widen and liquidity to tighten in the fixed income debt markets. A weaker European economy may transcend Europe, cause investors to lose confidence in the safety and soundness of European financial institutions and the stability of European member economies, and likewise adversely affect U.S.-based financial institutions, the stability of the global financial markets, and the U.S. economy. We have no direct exposure to sovereign issuances of Spain, Italy, Ireland, Portugal, or Greece.

We believe our cash balances, investment securities, operating cash flows, and funds available under our credit agreement or from other public or private financing sources, taken together, provide adequate resources to fund ongoing operating and regulatory requirements, acquisitions, future expansion opportunities, and capital expenditures for at least the next twelve months, as well as to refinance or repay debt, and repurchase shares. However, continuing adverse securities and credit market conditions may significantly affect the availability of credit. While there is no assurance in the current economic environment, we have no reason to believe the lenders participating in our credit agreement will not be willing and able to provide financing in accordance with the terms of the agreement.

Our access to additional credit will depend on a variety of factors such as market conditions, the general availability of credit, both to the overall market and our industry, our credit ratings and debt capacity, as well as the possibility that customers or lenders could develop a negative perception of our long or short-term financial prospects. Similarly, our access to funds could be limited if regulatory authorities or rating agencies were to take negative actions against us. If a combination of these factors were to occur, we may not be able to successfully obtain additional financing on favorable terms or at all.

Given the current economic climate, our stock and the stocks of other companies in the insurance industry may be increasingly subject to stock price and trading volume volatility.

Over the past three years, the stock markets have experienced significant price and trading volume volatility. Company-specific issues and market developments generally in the insurance industry and in the



regulatory environment may have contributed to this volatility. Our stock price has fluctuated and may continue to materially fluctuate in response to a number of events and factors, including:

• the enactment of, and the potential for additional, health insurance reform;

• general economic conditions;

• quarterly variations in operating results;

• natural disasters, terrorist attacks and epidemics;

• changes in financial estimates and recommendations by securities analysts;

• operating and stock price performance of other companies that investors may deem comparable;

- press releases or negative publicity relating to our competitors or us or relating to trends in our markets;

• regulatory changes and adverse outcomes from litigation and government or regulatory investigations;

• sales of stock by insiders;

• changes in our credit ratings;

• limitations on premium levels or the ability to raise premiums on existing policies;

• increases in minimum capital, reserves, and other financial strength requirements; and

• limitations on our ability to repurchase our common stock.

These factors could materially reduce our stock price. In addition, broad market and industry fluctuations may adversely affect the trading price of our common stock, regardless of our actual operating performance.

## ITEM 1B. UNRESOLVED STAFF COMMENTS

None.



## ITEM 2. PROPERTIES

Our principal executive office is located in the Humana Building, 500 West Main Street, Louisville, Kentucky 40202. In addition to this property, our other principal operating facilities are located in Louisville, Kentucky; Green Bay, Wisconsin; Tampa Bay, Florida; Cincinnati, Ohio; and San Juan, Puerto Rico, all of which are used for customer service, enrollment, and claims processing. Our Louisville and Green Bay facilities also house other corporate functions.

We own or lease these principal operating facilities in addition to other administrative market offices and medical centers. The following table lists the location of properties we owned or leased, including our principal operating facilities, at December 31, 2012:

<table><tr><td rowspan="2"></td><td colspan="2">Medical Centers</td><td colspan="2">Administrative Offices</td><td rowspan="2">Total</td></tr><tr><td>Owned</td><td>Leased</td><td>Owned</td><td>Leased</td></tr><tr><td>Florida</td><td>8</td><td>91</td><td>4</td><td>97</td><td>200</td></tr><tr><td>Texas</td><td>5</td><td>49</td><td>3</td><td>39</td><td>96</td></tr><tr><td>California</td><td>—</td><td>24</td><td>—</td><td>19</td><td>43</td></tr><tr><td>Georgia</td><td>1</td><td>22</td><td>—</td><td>16</td><td>39</td></tr><tr><td>Kentucky</td><td>2</td><td>10</td><td>9</td><td>10</td><td>31</td></tr><tr><td>Colorado</td><td>—</td><td>22</td><td>—</td><td>8</td><td>30</td></tr><tr><td>Illinois</td><td>—</td><td>19</td><td>—</td><td>11</td><td>30</td></tr><tr><td>Ohio</td><td>—</td><td>9</td><td>—</td><td>17</td><td>26</td></tr><tr><td>Michigan</td><td>—</td><td>22</td><td>—</td><td>3</td><td>25</td></tr><tr><td>New Jersey</td><td>—</td><td>14</td><td>—</td><td>11</td><td>25</td></tr><tr><td>Arizona</td><td>1</td><td>12</td><td>—</td><td>11</td><td>24</td></tr><tr><td>Tennessee</td><td>—</td><td>11</td><td>—</td><td>13</td><td>24</td></tr><tr><td>Louisiana</td><td>—</td><td>10</td><td>—</td><td>12</td><td>22</td></tr><tr><td>Pennsylvania</td><td>—</td><td>16</td><td>—</td><td>6</td><td>22</td></tr><tr><td>Missouri</td><td>—</td><td>14</td><td>—</td><td>6</td><td>20</td></tr><tr><td>Virginia</td><td>—</td><td>12</td><td>—</td><td>8</td><td>20</td></tr><tr><td>South Carolina</td><td>—</td><td>2</td><td>8</td><td>9</td><td>19</td></tr><tr><td>New York</td><td>—</td><td>4</td><td>—</td><td>13</td><td>17</td></tr><tr><td>North Carolina</td><td>—</td><td>7</td><td>—</td><td>10</td><td>17</td></tr><tr><td>Wisconsin</td><td>—</td><td>9</td><td>1</td><td>7</td><td>17</td></tr><tr><td>Indiana</td><td>—</td><td>8</td><td>—</td><td>7</td><td>15</td></tr><tr><td>Nevada</td><td>—</td><td>10</td><td>—</td><td>5</td><td>15</td></tr><tr><td>Maryland</td><td>—</td><td>10</td><td>—</td><td>4</td><td>14</td></tr><tr><td>Connecticut</td><td>—</td><td>10</td><td>—</td><td>3</td><td>13</td></tr><tr><td>Oklahoma</td><td>—</td><td>7</td><td>—</td><td>6</td><td>13</td></tr><tr><td>Puerto Rico</td><td>—</td><td>—</td><td>—</td><td>13</td><td>13</td></tr><tr><td>Others</td><td>—</td><td>50</td><td>—</td><td>56</td><td>106</td></tr><tr><td>Total</td><td>17</td><td>474</td><td>25</td><td>420</td><td>936</td></tr></table>

Of the medical centers included in the table above, we no longer operate approximately 45 of these facilities but rather lease or sublease them to their provider operators.



## ITEM 3. LEGAL PROCEEDINGS

We are party to a variety of legal actions in the ordinary course of business, certain of which may be styled as class-action lawsuits, including employment matters, claims of medical malpractice, bad faith, nonacceptance or termination of providers, anticompetitive practices, improper rate setting, failure to disclose network discounts and various other provider arrangements, general contractual matters, intellectual property matters, and challenges to subrogation practices. See “Legal Proceedings and Certain Regulatory Matters” in Note 15 to the consolidated financial statements included in Item 8. – Financial Statements and Supplementary Data. We cannot predict the outcome of these suits with certainty.

## ITEM 4. MINE SAFETY DISCLOSURES

Not applicable.



## PART II

## ITEM 5. MARKET FOR THE REGISTRANT'S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES

## Market Information

Our common stock trades on the New York Stock Exchange under the symbol HUM. The following table shows the range of high and low closing sales prices as reported on the New York Stock Exchange Composite Price for each quarter in the years ended December 31, 2012 and 2011:

<table><tr><td></td><td>High</td><td>Low</td></tr><tr><td>Year Ended December 31, 2012</td><td></td><td></td></tr><tr><td>First quarter</td><td>$95.50</td><td>$85.15</td></tr><tr><td>Second quarter</td><td>$91.85</td><td>$74.53</td></tr><tr><td>Third quarter</td><td>$77.03</td><td>$61.60</td></tr><tr><td>Fourth quarter</td><td>$76.20</td><td>$64.39</td></tr><tr><td>Year Ended December 31, 2011</td><td></td><td></td></tr><tr><td>First quarter</td><td>$69.94</td><td>$55.04</td></tr><tr><td>Second quarter</td><td>$82.55</td><td>$69.35</td></tr><tr><td>Third quarter</td><td>$83.55</td><td>$65.65</td></tr><tr><td>Fourth quarter</td><td>$89.83</td><td>$68.43</td></tr></table>

## Holders of our Capital Stock

As of January 31, 2013, there were approximately 4,000 holders of record of our common stock and approximately 41,500 beneficial holders of our common stock.

## Dividends

In April 2011, our Board of Directors approved the initiation of a quarterly cash dividend policy. Declaration and payment of future quarterly dividends is at the discretion of the Board and may be adjusted as business needs or market conditions change.

The following table provides details of dividend payments in 2011 and 2012:

<table><tr><td>Record Date</td><td>Payment Date</td><td>Amount per Share</td><td>Total Amount</td></tr><tr><td></td><td></td><td></td><td>(in millions)</td></tr><tr><td>2011 payments</td><td></td><td></td><td></td></tr><tr><td>6/30/2011</td><td>7/28/2011</td><td>$0.25</td><td>$41</td></tr><tr><td>9/30/2011</td><td>10/28/2011</td><td>$0.25</td><td>$41</td></tr><tr><td>2012 payments</td><td></td><td></td><td></td></tr><tr><td>12/30/2011</td><td>1/31/2012</td><td>$0.25</td><td>$41</td></tr><tr><td>3/30/2012</td><td>4/27/2012</td><td>$0.25</td><td>$41</td></tr><tr><td>6/29/2012</td><td>7/27/2012</td><td>$0.26</td><td>$42</td></tr><tr><td>9/28/2012</td><td>10/26/2012</td><td>$0.26</td><td>$41</td></tr></table>

In October 2012, the Board of Directors declared a cash dividend of $0.26 per share that was paid on January 25, 2013, for an aggregate amount of $42 million, to stockholders of record as of the close of business on December 31, 2012.



## Stock Total Return Performance

The following graph compares our total return to stockholders with the returns of the Standard & Poor’s Composite 500 Index (“S&P 500”) and the Morgan Stanley Health Care Payer Index (“Peer Group”) for the five years ended December 31, 2012. The graph assumes an investment of $100 in each of our common stock, the S&P 500, and the Peer Group on December 31, 2007, and that dividends were reinvested when paid.



The stock price performance included in this graph is not necessarily indicative of future stock price performance.

## Issuer Purchases of Equity Securities

In April 2012, the Board of Directors replaced its previously approved share repurchase authorization of up to $1 billion (of which $461 million remained unused) with the current authorization for repurchases of up to $1 billion of our common shares exclusive of shares repurchased in connection with employee stock plans, expiring on June 30, 2014. Under this share repurchase authorization, shares could be purchased from time to time at prevailing prices in the open market, by block purchases, or in privately-negotiated transactions, subject to certain regulatory restrictions on volume, pricing, and timing. During 2012, we repurchased 1.15 million shares in open market transactions for $100 million at an average price of $86.95 under a previously approved share repurchase authorization and we repurchased 5.1 million shares in open market transactions for $360 million at an average price of $70.66 under the current authorization. During 2011, we repurchased 6.8 million shares in open market transactions for $492 million at an average price of $72.75 under previously approved share repurchase authorizations. During 2010, we repurchased 1.99 million shares for $100 million at an average price of $50.17 under previously approved share repurchase authorizations. As of February 1, 2013, the remaining authorized amount under the current authorization totaled $640 million.

In connection with employee stock plans, we acquired 0.7 million common shares for $58 million in 2012, 0.8 million common shares for $49 million in 2011, and 0.2 million common shares for $8 million in 2010.



## ITEM 6. SELECTED FINANCIAL DATA

<table><tr><td></td><td>2012 (a)</td><td>2011 (b)</td><td>2010 (c)</td><td>2009</td><td>2008 (d)</td></tr><tr><td colspan="6">(dollars in millions, except per common share results)</td></tr><tr><td colspan="6">Summary of Operating Results:</td></tr><tr><td>Revenues:</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Premiums</td><td>$ 37,009</td><td>$ 35,106</td><td>$ 32,712</td><td>$ 29,927</td><td>$ 28,065</td></tr><tr><td>Services</td><td>1,726</td><td>1,360</td><td>555</td><td>520</td><td>468</td></tr><tr><td>Investment income</td><td>391</td><td>366</td><td>329</td><td>296</td><td>220</td></tr><tr><td>Total revenues</td><td>39,126</td><td>36,832</td><td>33,596</td><td>30,743</td><td>28,753</td></tr><tr><td>Operating expenses:</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Benefits</td><td>30,985</td><td>28,823</td><td>27,117</td><td>24,784</td><td>23,730</td></tr><tr><td>Operating costs</td><td>5,830</td><td>5,395</td><td>4,380</td><td>4,014</td><td>3,740</td></tr><tr><td>Depreciation and amortization</td><td>295</td><td>270</td><td>245</td><td>237</td><td>210</td></tr><tr><td>Total operating expenses</td><td>37,110</td><td>34,488</td><td>31,742</td><td>29,035</td><td>27,680</td></tr><tr><td>Income from operations</td><td>2,016</td><td>2,344</td><td>1,854</td><td>1,708</td><td>1,073</td></tr><tr><td>Interest expense</td><td>105</td><td>109</td><td>105</td><td>106</td><td>80</td></tr><tr><td>Income before income taxes</td><td>1,911</td><td>2,235</td><td>1,749</td><td>1,602</td><td>993</td></tr><tr><td>Provision for income taxes</td><td>689</td><td>816</td><td>650</td><td>562</td><td>346</td></tr><tr><td>Net income</td><td>$ 1,222</td><td>$ 1,419</td><td>$ 1,099</td><td>$ 1,040</td><td>$ 647</td></tr><tr><td>Basic earnings per common share</td><td>$ 7.56</td><td>$ 8.58</td><td>$ 6.55</td><td>$ 6.21</td><td>$ 3.87</td></tr><tr><td>Diluted earnings per common share</td><td>$ 7.47</td><td>$ 8.46</td><td>$ 6.47</td><td>$ 6.15</td><td>$ 3.83</td></tr><tr><td>Dividends declared per common share</td><td>$ 1.03</td><td>$ 0.75</td><td>$ 0.00</td><td>$ 0.00</td><td>$ 0.00</td></tr><tr><td colspan="6">Financial Position:</td></tr><tr><td>Cash and investments</td><td>$ 11,153</td><td>$ 10,830</td><td>$ 10,046</td><td>$ 9,111</td><td>$ 7,186</td></tr><tr><td>Total assets</td><td>19,979</td><td>17,708</td><td>16,103</td><td>14,153</td><td>13,042</td></tr><tr><td>Benefits payable</td><td>3,779</td><td>3,754</td><td>3,469</td><td>3,222</td><td>3,206</td></tr><tr><td>Debt</td><td>2,611</td><td>1,659</td><td>1,669</td><td>1,678</td><td>1,937</td></tr><tr><td>Stockholders&#x27; equity</td><td>8,847</td><td>8,063</td><td>6,924</td><td>5,776</td><td>4,457</td></tr><tr><td>Cash flows from operations</td><td>$ 1,923</td><td>$ 2,079</td><td>$ 2,242</td><td>$ 1,422</td><td>$ 982</td></tr><tr><td colspan="6">Key Financial Indicators:</td></tr><tr><td>Benefit ratio</td><td>83.7 %</td><td>82.1 %</td><td>82.9 %</td><td>82.8 %</td><td>84.6 %</td></tr><tr><td>Operating cost ratio</td><td>15.1 %</td><td>14.8 %</td><td>13.2 %</td><td>13.2 %</td><td>13.1 %</td></tr><tr><td colspan="6">Membership by Segment:</td></tr><tr><td>Retail segment:</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Medical membership</td><td>5,434,600</td><td>4,673,900</td><td>3,542,200</td><td>3,729,400</td><td>4,764,900</td></tr><tr><td>Specialty membership</td><td>948,700</td><td>782,500</td><td>510,000</td><td>297,300</td><td>324,600</td></tr><tr><td>Employer Group segment:</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Medical membership</td><td>2,852,400</td><td>2,794,900</td><td>3,009,500</td><td>3,117,800</td><td>3,358,400</td></tr><tr><td>Specialty membership</td><td>7,136,200</td><td>6,532,600</td><td>6,517,500</td><td>6,761,900</td><td>6,244,100</td></tr><tr><td>Other Businesses:</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Medical membership</td><td>3,801,800</td><td>3,715,800</td><td>3,734,900</td><td>3,486,800</td><td>3,488,900</td></tr><tr><td>Consolidated:</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Total medical membership</td><td>12,088,800</td><td>11,184,600</td><td>10,286,600</td><td>10,334,000</td><td>11,612,200</td></tr><tr><td>Total specialty membership</td><td>8,084,900</td><td>7,315,100</td><td>7,027,500</td><td>7,059,200</td><td>6,568,700</td></tr></table>

(a) Includes the acquired operations of Arcadian Management Services, Inc. from March 31, 2012, SeniorBridge Family Companies, Inc. from July 6, 2012, and Metropolitan Health Networks, Inc. from



December 21, 2012. Also includes benefits expense of approximately $46 million ($29 million after tax, $0.18 per diluted common share) for a litigation settlement associated with our military services business.

(b) Includes the acquired operations of Anvita, Inc. from December 6, 2011.

(c) Includes the acquired operations of Concentra Inc. from December 21, 2010. Also includes operating costs of $147 million ($93 million after tax, or $0.55 per diluted common share) for the write-down of deferred acquisition costs associated with our individual commercial medical policies and benefits expense of $139 million ($88 million after tax, or $0.52 per diluted common share) associated with reserve strengthening for our closed block of long-term care policies acquired in connection with the 2007 acquisition of KMG America Corporation.

(d) Includes the acquired operations of UnitedHealth Group’s Las Vegas, Nevada individual SecureHorizons Medicare Advantage HMO business from April 30, 2008, the acquired operations of OSF Health Plans, Inc. from May 22, 2008, the acquired operations of Metcare Health Plans, Inc. from August 29, 2008, and the acquired operations of PHP Companies, Inc. (d/b/a Cariten Healthcare) from October 31, 2008.



## ITEM 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

## Executive Overview

## General

Headquartered in Louisville, Kentucky, Humana is a leading health care company that offers a wide range of insurance products and health and wellness services that incorporate an integrated approach to lifelong well-being. By leveraging the strengths of our core businesses, we believe that we can better explore opportunities for existing and emerging adjacencies in health care that can further enhance wellness opportunities for the millions of people across the nation with whom we have relationships.

Our industry relies on two key statistics to measure performance. The benefit ratio, which is computed by taking total benefits expense as a percentage of premiums revenue, represents a statistic used to measure underwriting profitability. The operating cost ratio, which is computed by taking total operating costs as a percentage of total revenue less investment income, represents a statistic used to measure administrative spending efficiency.

## Business Segments

We manage our business with three reportable segments: Retail, Employer Group, and Health and Well-Being Services. In addition, the Other Businesses category includes businesses that are not individually reportable because they do not meet the quantitative thresholds required by generally accepted accounting principles. These segments are based on a combination of the type of health plan customer and adjacent businesses centered on well-being solutions for our health plans and other customers, as described below. These segment groupings are consistent with information used by our Chief Executive Officer to assess performance and allocate resources.

The Retail segment consists of Medicare and commercial fully-insured medical and specialty health insurance benefits, including dental, vision, and other supplemental health and financial protection products, marketed directly to individuals. The Employer Group segment consists of Medicare and commercial fully-insured medical and specialty health insurance benefits, including dental, vision, and other supplemental health and financial protection products, as well as administrative services only products marketed to employer groups. The Health and Well-Being Services segment includes services offered to our health plan members as well as to third parties that promote health and wellness, including provider services, pharmacy, integrated wellness, and home care services. The Other Businesses category consists of our military services, primarily our TRICARE South Region contract, Medicaid, and closed-block long-term care businesses as well as our contract with CMS to administer the Limited Income Newly Eligible Transition program, or the LI-NET program.

The results of each segment are measured by income before income taxes. Transactions between reportable segments consist of sales of services rendered by our Health and Well-Being Services segment, primarily pharmacy, behavioral health, and provider services, to our Retail and Employer Group customers. Intersegment sales and expenses are recorded at fair value and eliminated in consolidation. Members served by our segments often utilize the same provider networks, enabling us in some instances to obtain more favorable contract terms with providers. Our segments also share indirect costs and assets. As a result, the profitability of each segment is interdependent. We allocate most operating expenses to our segments. Assets and certain corporate income and expenses are not allocated to the segments, including the portion of investment income not supporting segment operations, interest expense on corporate debt, and certain other corporate expenses. These items are managed at the corporate level. These corporate amounts are reported separately from our reportable segments and included with intersegment eliminations.



## Seasonality

One of the product offerings of our Retail segment is Medicare stand-alone prescription drug plans, or PDPs, under the Medicare Part D program. These plans provide varying degrees of coverage. Our quarterly Retail segment earnings and operating cash flows are impacted by the Medicare Part D benefit design and changes in the composition of our membership. The Medicare Part D benefit design results in coverage that varies as a member's cumulative out-of-pocket costs pass through successive stages of a member's plan period which begins annually on January 1 for renewals. These plan designs generally result in us sharing a greater portion of the responsibility for total prescription drug costs in the early stages and less in the latter stages. As a result, the PDP benefit ratio generally decreases as the year progresses. In addition, the number of low-income senior members as well as year-over-year changes in the mix of membership in our stand-alone PDP products affects the quarterly benefit ratio pattern.

Our Employer Group segment also experiences seasonality in the benefit ratio pattern. However, the effect is opposite of the Retail segment, with the Employer Group’s benefit ratio increasing as fully-insured members progress through their annual deductible and maximum out-of-pocket expenses.

## 2012 Highlights

## Consolidated

- Our 2012 results reflect the continued implementation of our strategy to offer our members affordable health care combined with a positive consumer experience in growing markets. At the core of this strategy is our integrated care delivery model, which unites quality care, high member engagement, and sophisticated data analytics. Our approach to primary, physician-directed care for our members aims to provide quality care that is consistent, integrated, cost-effective, and member-focused. The model is designed to improve health outcomes and affordability for individuals and for the health system as a whole, while offering our members a simple, seamless healthcare experience. We believe this strategy is positioning us for continued sustainable growth in both membership and earnings. At December 31, 2012, approximately 511,700 members, or 26.5%, of our individual Medicare Advantage membership were in risk arrangements under our integrated care delivery model. We expect that number to grow in 2013.

- During 2012, we issued $1 billion of senior notes, repurchased 6.25 million shares in open market transactions for $460 million, and declared dividends to stockholders of $1.03 per share for an aggregate amount of $166 million.

- Our results for the year ended December 31, 2012, were significantly impacted by a higher benefit ratio. The consolidated benefit ratio increased 160 basis points to 83.7% for the year ended December 31, 2012 compared to 82.1% for the year ended December 31, 2011. The increase primarily was due to an increase in the Retail segment benefit ratio primarily associated with our individual Medicare Advantage products discussed in our Retail segment highlights that follow.

- Comparisons to our 2012 consolidated benefit ratio and operating cost ratio are impacted by the transition to the new TRICARE South Region contract on April 1, 2012, which is accounted for similar to an administrative services fee only agreement as described in our Other Businesses highlights that follow. Our previous contract was accounted for similar to our fully-insured products.

- As more fully described herein under the section titled “Benefits Expense Recognition” actuarial standards require the use of assumptions based on moderately adverse experience, which generally results in favorable reserve development, or reserves that are considered redundant. We experienced favorable medical claims reserve development related to prior fiscal years of $257 million in 2012, $372 million in 2011, and $434 million in 2010. Year-over-year comparisons of the benefit ratio were negatively impacted by the $115 million decline in favorable prior-period medical claims reserve development from 2011 to 2012.



## Retail Segment

- On February 15, 2013, CMS issued its Advance Notice for methodological changes for 2014 Medicare Advantage capitation rates and Part C and Part D payment policies. We believe the Advance Notice indicates a mid-single-digit decline in the benchmark payment rates from CMS for 2014. This excludes the impact of the industry premium tax, county rebasing, and risk factor recalibration, which are anticipated to be discussed in the final rate notice. However, the Advance Notice is subject to comment, and the final rates will not be published until April 1, 2013. We are closely analyzing all operational avenues available to address these preliminary rates and the related impact on our ability to grow both our Medicare membership and our earnings for 2014. We are committed to providing quality care and service to our members through the Medicare Advantage program. We will be drawing upon our program expertise to comment on the impact of these preliminary rate changes upon beneficiaries as we provide comments to CMS. Nonetheless, there can be no assurance that we will be able to successfully execute operational and strategic initiatives with respect to changes in the Medicare Advantage program. Failure to execute these strategies may result in a material adverse effect on our results of operations, financial position, and cash flows.

- As discussed in the detailed Retail segment results of operations discussion that follows, we experienced a significant increase in the benefit ratio in the Retail segment, with the segment’s benefit ratio increasing 290 basis points to 84.1% for the year ended December 31, 2012. The increase primarily was due to a planned increase in the target benefit ratio associated with positioning for Health Insurance Reform Legislation funding changes and minimum benefit ratio requirements and a higher individual Medicare Advantage benefit ratio experienced on new membership than the assumptions used in our 2012 Medicare bids.

- Individual Medicare Advantage membership of 1,927,600 at December 31, 2012 increased 287,300 members, or 17.5%, from 1,640,300 at December 31, 2011 primarily due to the 2012 enrollment season, as well as age-in enrollment throughout the year. We acquired approximately 62,600 members with Arcadian Management Services, Inc., or Arcadian, effective March 31, 2012. As discussed below, we divested approximately 12,600 members acquired with Arcadian effective January 1, 2013 in accordance with our agreement with the United States Department of Justice. January 2013 individual Medicare Advantage membership of approximately 2,011,000 increased more than 83,000 members, or approximately 4%, from December 31, 2012, reflecting net membership additions for the 2013 enrollment season and the Arcadian related divestitures discussed below. In addition, we significantly expanded our Health Maintenance Organization, or HMO, offerings in 2013, which we believe allow our integrated care delivery model to work more effectively for our members than any other plan option. The percentage of individual Medicare Advantage members who chose an HMO offering during the 2013 enrollment period reached approximately 48%.

- Individual Medicare stand-alone PDP membership of 2,985,600 at December 31, 2012 increased 445,200 members, or 17.5%, from 2,540,400 at December 31, 2011 primarily from higher gross sales during the 2012 enrollment season, particularly for our national stand-alone Medicare Part D prescription drug plan co-branded with Wal-Mart Stores, Inc., or the Humana-Walmart plan, supplemented by dual-eligible and age-in enrollments throughout the year. January 2013 individual Medicare stand-alone PDP membership grew to approximately 3,113,000, increasing approximately 127,000 members, or 4%, from December 31, 2012, reflecting net membership additions for the 2013 enrollment season.



- Effective March 31, 2012, we acquired Arcadian, a Medicare Advantage HMO serving members in 15 U.S. states, increasing our Medicare membership by approximately 62,600 members and expanding our Medicare footprint and future growth opportunities. To obtain antitrust approval in connection with the Arcadian acquisition, we entered into a consent agreement with the United States Department of Justice that required divestiture of overlapping Medicare Advantage health plan business in eight areas within Arizona, Arkansas, Louisiana, Oklahoma, and Texas. Accordingly, we divested 12,600 members effective January 1, 2013.

- During 2012, we were successful in our bids for Medicaid business in Ohio, Illinois, and Kentucky, including individuals dually eligible for both the federal Medicare program and the state-based Medicaid program in both Ohio and Illinois. We partnered with CareSource Management Group Company to serve the Ohio and Kentucky individuals under a March 2012 strategic alliance agreement.

## Employer Group Segment

- Fully-insured group Medicare Advantage membership of 370,800 at December 31, 2012 increased 80,200 members, or 27.6%, from 290,600 at December 31, 2011 primarily due to the January 2012 addition of a new large group retiree account.

## Health and Well-Being Services Segment

- On December 21, 2012, we acquired Metropolitan Health Networks, Inc., or Metropolitan, a Medical Services Organization, or MSO, that coordinates medical care for Medicare Advantage beneficiaries and Medicaid recipients, primarily in Florida. We paid $11.25 per share in cash to acquire all of the outstanding shares of Metropolitan and repaid all outstanding debt of Metropolitan for a transaction value of $851 million, plus transaction expenses.

On October 29, 2012, we acquired a noncontrolling equity interest in MCCI Holdings, LLC, or MCCI, a privately held MSO headquartered in Miami, Florida that coordinates medical care for Medicare Advantage and Medicaid beneficiaries primarily in Florida and Texas.

The Metropolitan and MCCI transactions are expected to provide us with components of a successful integrated care delivery model that has demonstrated scalability to new markets. A substantial portion of the revenues for both Metropolitan and MCCI are derived from services provided to Humana Medicare Advantage members under capitation contracts with our health plans. In addition, Metropolitan and MCCI provide services to Medicare Advantage and Medicaid members under capitation contracts with third party health plans. Under these capitation agreements with Humana and third party health plans, Metropolitan and MCCI assume financial risk associated with these Medicare Advantage and Medicaid members.

- On July 6, 2012, we acquired SeniorBridge Family Companies, Inc., or SeniorBridge, a chronic-care provider of in-home care for seniors, expanding our existing clinical and home health capabilities and strengthening our offerings for members with complex chronic-care needs.

## Other Businesses

- On April 1, 2012, we began delivering services under the new TRICARE South Region contract that the Department of Defense TRICARE Management Activity, or TMA, awarded to us on February 25, 2011. The new 5-year South Region contract, which expires March 31, 2017, is subject to annual renewals on April 1 of each year during its term at the government’s option. The TMA has notified us of its intent to exercise its option to extend the TRICARE South Region contract through March 31, 2014. We account for revenues under the new contract net of estimated health care costs similar to an administrative services fee only agreement. Our previous contract was accounted for similar to our fully-insured products.



- Year-over-year comparisons within Other Businesses are impacted by the transition to the new TRICARE South Region contract on April 1, 2012, including a change in profitability under the new contract in connection with our bid strategy, benefits expense of approximately $46 million incurred related to the settlement of litigation associated with our military services business during 2012, and benefits expense of $29 million for reserve strengthening associated with our closed-block of long-term care policies during 2012 as discussed in Note 17 to the consolidated financial statements included in Item 8. – Financial Statements and Supplementary Data.

## Health Insurance Reform

The Patient Protection and Affordable Care Act and The Health Care and Education Reconciliation Act of 2010 (which we collectively refer to as the Health Insurance Reform Legislation) enacted significant reforms to various aspects of the U.S. health insurance industry. While regulations and interpretive guidance on some provisions of the Health Insurance Reform Legislation have been issued to date by the Department of Health and Human Services, or HHS, the Department of Labor, the Treasury Department, and the National Association of Insurance Commissioners, there are many provisions of the legislation that will require additional guidance and clarification in the form of regulations and interpretations in order to fully understand the impacts of the legislation on our overall business, which we expect to occur over the next several years.

Implementation dates of the Health Insurance Reform Legislation began in September 2010 and continue through 2018. The following outlines certain provisions of the Health Insurance Reform Legislation:

- Many changes are already effective and have been implemented by the Company, including: elimination of pre-existing condition limits for enrollees under age 19, elimination of certain annual and lifetime caps on the dollar value of benefits, expansion of dependent coverage to include adult children until age 26, a requirement to provide coverage for prescribed preventive services without cost to members, new claim appeal requirements, and the establishment of an interim high risk program for those unable to obtain coverage due to a pre-existing condition or health status.

- Effective January 1, 2011, minimum benefit ratios were mandated for all commercial fully-insured medical plans in the large group (85%), small group (80%), and individual (80%) markets, with annual rebates to policyholders if the actual benefit ratios, calculated in a manner prescribed by HHS, do not meet these minimums. We began accruing for rebates in 2011, based on the manner prescribed by HHS, with initial rebate payments made in July 2012. Our benefit ratios reported herein, calculated from financial statements prepared in accordance with accounting principles generally accepted in the United States of America, or GAAP, differ from the benefit ratios calculated as prescribed by HHS under the Health Insurance Reform Legislation. The more noteworthy differences include the fact that the benefit ratio calculations prescribed by HHS are calculated separately by state and legal entity; independently for individual, small group, and large group fully-insured products; reflect actuarial adjustments where the membership levels are not large enough to create credible size; exclude some of our health insurance products; include taxes and fees as reductions of premium; treat changes in reserves differently than GAAP; and classify rebate amounts as additions to incurred claims as opposed to adjustments to premiums for GAAP reporting.

- Medicare Advantage payment benchmarks for 2011 were frozen at 2010 levels and in 2012, additional cuts to Medicare Advantage plan payments began to take effect (with plan payment benchmarks ultimately ranging from 95% in high-cost areas to 115% in low-cost areas of Medicare fee-for-service rates), with changes being phased-in over two to six years, depending on the level of payment reduction in a county. In addition, beginning in 2011 the gap in coverage for Medicare Part D prescription drug coverage is incrementally closing.

- Beginning in 2014, the Health Insurance Reform Legislation requires: all individual and group health plans to guarantee issuance and renew coverage without pre-existing condition exclusions or health-status rating adjustments; the elimination of annual limits on coverage on certain plans; the



establishment of federally facilitated or state-based exchanges for individuals and small employers (with up to 100 employees) coupled with programs designed to spread risk among insurers; the introduction of plan designs based on set actuarial values; the establishment of a minimum benefit ratio of 85% for Medicare plans; and insurance industry assessments, including an annual premium-based assessment and a three-year $25 billion commercial reinsurance fee. The annual premium-based assessment levied on the insurance industry is $8 billion in 2014 with increasing annual amounts thereafter, growing to $14 billion by 2017, and is not deductible for income tax purposes, which will significantly increase our effective income tax rate in 2014. The National Association of Insurance Commissioners, or NAIC, is continuing discussions regarding the accounting for the insurance industry premium-based assessment and may require accrual and associated subsidiary funding consideration for the first two years of the assessment in 2014 followed by annual accruals thereafter. The NAIC guidance is contradictory to final GAAP guidance issued by the FASB in July 2011, which requires annual accrual of the insurance industry premium-based assessment in the year in which it is payable.

The Health Insurance Reform Legislation also specifies benefit design guidelines, limits rating and pricing practices, encourages additional competition (including potential incentives for new market entrants) and expands eligibility for Medicaid programs. In addition, the law will increase federal oversight of health plan premium rates and could adversely affect our ability to appropriately adjust health plan premiums on a timely basis. Financing for these reforms will come, in part, from material additional fees and taxes on us and other health plans and individuals beginning in 2014, as well as reductions in certain levels of payments to us and other health plans under Medicare as described herein.

In addition, certain provisions in the Health Insurance Reform Legislation tie Medicare Advantage premiums to the achievement of certain quality performance measures (Star Ratings). Beginning in 2012, Medicare Advantage plans with an overall Star Rating of three or more stars (out of five) were eligible for a quality bonus in their basic premium rates. Initially quality bonuses were limited to the few plans that achieved four or more stars as an overall rating, but CMS has expanded the quality bonus to three Star plans for a three year period through 2014. Star Ratings issued by CMS in October 2012 indicated that 99% of our Medicare Advantage members are now in plans that will qualify for quality bonus payments in 2014, up from 98% in 2013. Further, the percentage of our Medicare Advantage members in plans with an overall Star Rating of four or more stars, including one five star plan, increased to 40%. Plans that earn an overall Star Rating of five are immediately eligible to enroll members year round. Beginning in 2015, plans must have a Star Rating of four or higher to qualify for bonus money. Notwithstanding successful historical efforts to improve our Star Ratings and other quality measures for 2012 and 2013 and the continuation of such efforts, there can be no assurances that we will be successful in maintaining or improving our Star Ratings in future years. Accordingly, our plans may not be eligible for full level quality bonuses, which could adversely affect the benefits such plans can offer, reduce membership, and/or reduce profit margins.

As discussed above, implementing regulations and related interpretive guidance continue to be issued on several significant provisions of the Health Insurance Reform Legislation. Congress may also withhold the funding necessary to implement the Health Insurance Reform Legislation, or may attempt to replace the legislation with amended provisions. Given the breadth of possible changes and the uncertainties of interpretation, implementation, and timing of these changes, which we expect to occur over the next several years, the Health Insurance Reform Legislation will change the way we do business, potentially impacting our pricing, benefit design, product mix, geographic mix, and distribution channels. In particular, implementing regulations and related guidance are forthcoming on various aspects of the minimum benefit ratio requirement’s applicability to Medicare, including aggregation, credibility thresholds, and its application to prescription drug plans. The response of other companies to the Health Insurance Reform Legislation and adjustments to their offerings, if any, could cause meaningful disruption in the local health care markets. It is reasonably possible that the Health Insurance Reform Legislation and related regulations, as well as future legislative changes, in the aggregate may have a material adverse effect on our results of operations, including restricting revenue, enrollment and premium growth in certain products and market segments, restricting our



ability to expand into new markets, increasing our medical and operating costs, lowering our Medicare payment rates and increasing our expenses associated with the non-deductible federal premium tax and other assessments; our financial position, including our ability to maintain the value of our goodwill; and our cash flows. If the new non-deductible federal premium tax and other assessments, including a three-year commercial reinsurance fee, were imposed as enacted, and if we are unable to adjust our business model to address these new taxes and assessments, such as through the reduction of our operating costs or adjustments to premium pricing or benefit design, there can be no assurance that the non-deductible federal premium tax and other assessments would not have a material adverse effect on our results of operations, financial position, and cash flows.

We intend for the discussion of our financial condition and results of operations that follows to assist in the understanding of our financial statements and related changes in certain key items in those financial statements from year to year, including the primary factors that accounted for those changes. Transactions between reportable segments consist of sales of services rendered by our Health and Well-Being Services segment, primarily pharmacy, behavioral health, and provider services, to our Retail and Employer Group customers and are described in Note 16 to the consolidated financial statements included in Item 8. – Financial Statements and Supplementary Data.



## Comparison of Results of Operations for 2012 and 2011

Certain financial data on a consolidated basis and for our segments was as follows for the years ended December 31, 2012 and 2011:

## Consolidated

<table><tr><td rowspan="3"></td><td colspan="4">Change</td></tr><tr><td>2012</td><td>2011</td><td>Dollars</td><td>Percentage</td></tr><tr><td colspan="4">(dollars in millions, except per common share results)</td></tr><tr><td>Revenues:</td><td></td><td></td><td></td><td></td></tr><tr><td>Premiums:</td><td></td><td></td><td></td><td></td></tr><tr><td>Retail</td><td>$24,550</td><td>$21,402</td><td>$ 3,148</td><td>14.7%</td></tr><tr><td>Employer Group</td><td>10,138</td><td>8,877</td><td>1,261</td><td>14.2%</td></tr><tr><td>Other Businesses</td><td>2,321</td><td>4,827</td><td>(2,506)</td><td>(51.9)%</td></tr><tr><td>Total premiums</td><td>37,009</td><td>35,106</td><td>1,903</td><td>5.4%</td></tr><tr><td>Services:</td><td></td><td></td><td></td><td></td></tr><tr><td>Retail</td><td>24</td><td>16</td><td>8</td><td>50.0%</td></tr><tr><td>Employer Group</td><td>358</td><td>356</td><td>2</td><td>0.6%</td></tr><tr><td>Health and Well-Being Services</td><td>1,036</td><td>903</td><td>133</td><td>14.7%</td></tr><tr><td>Other Businesses</td><td>308</td><td>85</td><td>223</td><td>262.4%</td></tr><tr><td>Total services</td><td>1,726</td><td>1,360</td><td>366</td><td>26.9%</td></tr><tr><td>Investment income</td><td>391</td><td>366</td><td>25</td><td>6.8%</td></tr><tr><td>Total revenues</td><td>39,126</td><td>36,832</td><td>2,294</td><td>6.2%</td></tr><tr><td>Operating expenses:</td><td></td><td></td><td></td><td></td></tr><tr><td>Benefits</td><td>30,985</td><td>28,823</td><td>2,162</td><td>7.5%</td></tr><tr><td>Operating costs</td><td>5,830</td><td>5,395</td><td>435</td><td>8.1%</td></tr><tr><td>Depreciation and amortization</td><td>295</td><td>270</td><td>25</td><td>9.3%</td></tr><tr><td>Total operating expenses</td><td>37,110</td><td>34,488</td><td>2,622</td><td>7.6%</td></tr><tr><td>Income from operations</td><td>2,016</td><td>2,344</td><td>(328)</td><td>(14.0)%</td></tr><tr><td>Interest expense</td><td>105</td><td>109</td><td>(4)</td><td>(3.7)%</td></tr><tr><td>Income before income taxes</td><td>1,911</td><td>2,235</td><td>(324)</td><td>(14.5)%</td></tr><tr><td>Provision for income taxes</td><td>689</td><td>816</td><td>(127)</td><td>(15.6)%</td></tr><tr><td>Net income</td><td>$ 1,222</td><td>$ 1,419</td><td>$ (197)</td><td>(13.9)%</td></tr><tr><td>Diluted earnings per common share</td><td>$ 7.47</td><td>$ 8.46</td><td>$ (0.99)</td><td>(11.7)%</td></tr><tr><td>Benefit ratio (a)</td><td>83.7%</td><td>82.1%</td><td></td><td>1.6%</td></tr><tr><td>Operating cost ratio (b)</td><td>15.1%</td><td>14.8%</td><td></td><td>0.3%</td></tr><tr><td>Effective tax rate</td><td>36.1%</td><td>36.5%</td><td></td><td>(0.4)%</td></tr></table>

(a) Represents total benefits expense as a percentage of premiums revenue.

(b) Represents total operating costs as a percentage of total revenues less investment income.

## Summary

Net income was $1.2 billion, or $7.47 per diluted common share, in 2012 compared to $1.4 billion, or $8.46 per diluted common share, in 2011 primarily due to lower operating results in the Retail segment, partially offset by improved operating performance in the Health and Well-Being Services segment. During 2012, we experienced a significant increase in the Retail segment benefit ratio primarily associated with our individual



Medicare Advantage products primarily due to a planned increase in the target benefit ratio associated with positioning for Health Insurance Reform Legislation funding changes and minimum benefit ratio requirements and a higher benefit ratio experienced on new membership than the assumptions used in our 2012 Medicare bids. Our diluted earnings per common share for 2012 included $0.18 per diluted common share for benefits expense related to the settlement of a litigation matter associated with our military services business, as well as $0.11 per diluted common share for benefits expense associated with reserve strengthening associated with our closed block of long-term care policies in our Other Businesses as discussed in Note 17 to the consolidated financial statements included in Item 8. – Financial Statements and Supplementary Data.

## Premiums Revenue

Consolidated premiums increased $1.9 billion, or 5.4%, from 2011 to $37.0 billion for 2012 primarily due to increases in both Retail and Employer Group segment premiums mainly driven by higher average individual and group Medicare Advantage membership, partially offset by lower premiums for our Other Businesses due to the transition to the new TRICARE South Region contract. As discussed previously, on April 1, 2012, we began delivering services under the new TRICARE South Region contract that the TMA awarded to us on February 25, 2011. We account for revenues under the new contract net of estimated healthcare costs similar to an administrative services fee only agreement, and as such there are no premiums recognized under the new contract. Our previous contract was accounted for similar to our fully-insured products and as such we recognized premiums under the previous contract. Average membership is calculated by summing the ending membership for each month in a period and dividing the result by the number of months in a period. Premiums revenue reflects changes in membership and average per member premiums. Items impacting average per member premiums include changes in premium rates as well as changes in the geographic mix of membership, the mix of product offerings, and the mix of benefit plans selected by our membership.

## Services Revenue

Consolidated services revenue increased $366 million, or 26.9%, from 2011 to $1.7 billion for 2012, primarily due to an increase in service revenue for our Other Businesses due to the transition to the new TRICARE South Region contract on April 1, 2012, and an increase in services revenue in our Health and Well-Being Services segment from growth in our Concentra operations and the acquisition of SeniorBridge on July 6, 2012.

## Investment Income

Investment income totaled $391 million for 2012, an increase of $25 million from 2011, primarily reflecting net capital gains realized in 2012 as a result of ordinary portfolio management during the year.

## Benefits Expense

Consolidated benefits expense was $31.0 billion for 2012, an increase of $2.2 billion, or 7.5%, from 2011 primarily due to a year-over-year increase in Retail and Employer Group segment benefits expense in 2012, primarily driven by an increase in the average number of Medicare members, partially offset by a decrease in benefits expense for Other Businesses primarily due to the transition to the new administrative services only TRICARE South Region contract on April 1, 2012. We do not record benefits expense under the new contract. Our previous contract was accounted for similar to our fully-insured products and as such we recorded benefits expense under the previous contract. Retail segment benefits expense increased $3.3 billion, or 18.8%, from 2011 to 2012 and Employer Group segment benefits expense increased $1.2 billion, or 16.5%, from 2011 to 2012. We experienced favorable medical claims reserve development related to prior fiscal years of $257 million in 2012 and $372 million in 2011.

The consolidated benefit ratio for 2012 was 83.7%, increasing 160 basis points from the 2011 benefit ratio of 82.1%, primarily driven by increases in both the Retail and Employer Group segments' benefit ratios as



described further in our segment results discussion that follows. The $115 million decline in favorable prior-period medical claims reserve development from 2011 to 2012 negatively impacted year-over-year comparisons of the benefit ratio. Year-over-year comparisons of the consolidated benefit ratio were favorably impacted by 20 basis points due to the continued growth of our Health & Well-Being Services segment and the related savings realized on a consolidated basis from providing these services directly to our members at fair market value rather than through a third party.

## Operating Costs

Our segments incur both direct and shared indirect operating costs. We allocate the indirect costs shared by the segments primarily as a function of revenues. As a result, the profitability of each segment is interdependent.

Consolidated operating costs increased $435 million, or 8.1%, during 2012 compared to 2011, primarily due an increase in operating costs in our Retail Segment as a result of Medicare Advantage growth.

The consolidated operating cost ratio for 2012 was 15.1%, increasing 30 basis points from the 2011 operating cost ratio of 14.8% as the negative impact of the new TRICARE South Region contract being accounted for as an administrative services fee only arrangement was partially offset by improved operating leverage.

## Depreciation and Amortization

Depreciation and amortization for 2012 totaled $295 million, an increase of $25 million, or 9.3%, from 2011, primarily reflecting depreciation and amortization expense associated with the acquisitions of Anvita in the fourth quarter of 2011, Arcadian in the first quarter of 2012, SeniorBridge in the third quarter of 2012, and other health and wellness businesses during 2012.

## Interest Expense

Interest expense was $105 million for 2012, compared to $109 million for 2011, a decrease of $4 million, or 3.7%. In March 2012, we repaid $36 million of junior subordinated debt that carried a higher interest rate than our senior notes. In December 2012, we issued $600 million of 3.15% senior notes due December 1, 2022 and $400 million of 4.625% senior notes due December 1, 2042.

## Income Taxes

Our effective tax rate during 2012 was 36.1% compared to the effective tax rate of 36.5% in 2011. See Note 10 to the consolidated financial statements included in Item 8. – Financial Statements and Supplementary Data for a complete reconciliation of the federal statutory rate to the effective tax rate.

## Retail Segment

<table><tr><td rowspan="2"></td><td rowspan="2">2012</td><td rowspan="2">2011</td><td colspan="2">Change</td></tr><tr><td>Members</td><td>Percentage</td></tr><tr><td>Membership:</td><td></td><td></td><td></td><td></td></tr><tr><td>Medical membership:</td><td></td><td></td><td></td><td></td></tr><tr><td>Individual Medicare Advantage</td><td>1,927,600</td><td>1,640,300</td><td>287,300</td><td>17.5%</td></tr><tr><td>Individual Medicare stand-alone PDP</td><td>2,985,600</td><td>2,540,400</td><td>445,200</td><td>17.5%</td></tr><tr><td>Total individual Medicare</td><td>4,913,200</td><td>4,180,700</td><td>732,500</td><td>17.5%</td></tr><tr><td>Individual commercial</td><td>521,400</td><td>493,200</td><td>28,200</td><td>5.7%</td></tr><tr><td>Total individual medical members</td><td>5,434,600</td><td>4,673,900</td><td>760,700</td><td>16.3%</td></tr><tr><td>Individual specialty membership (a)</td><td>948,700</td><td>782,500</td><td>166,200</td><td>21.2%</td></tr></table>



(a) Specialty products include dental, vision, and other supplemental health and financial protection products. Members included in these products may not be unique to each product since members have the ability to enroll in multiple products.

<table><tr><td rowspan="3"></td><td rowspan="3">2012</td><td rowspan="3">2011 (in millions)</td><td colspan="2">Change</td></tr><tr><td>Dollars</td><td>Percentage</td></tr><tr><td></td><td></td></tr><tr><td>Premiums and Services Revenue:</td><td></td><td></td><td></td><td></td></tr><tr><td>Premiums:</td><td></td><td></td><td></td><td></td></tr><tr><td>Individual Medicare Advantage</td><td>$20,788</td><td>$18,100</td><td>$2,688</td><td>14.9%</td></tr><tr><td>Individual Medicare stand-alone PDP</td><td>2,587</td><td>2,317</td><td>270</td><td>11.7%</td></tr><tr><td>Total individual Medicare</td><td>23,375</td><td>20,417</td><td>2,958</td><td>14.5%</td></tr><tr><td>Individual commercial</td><td>1,004</td><td>861</td><td>143</td><td>16.6%</td></tr><tr><td>Individual specialty</td><td>171</td><td>124</td><td>47</td><td>37.9%</td></tr><tr><td>Total premiums</td><td>24,550</td><td>21,402</td><td>3,148</td><td>14.7%</td></tr><tr><td>Services</td><td>24</td><td>16</td><td>8</td><td>50.0%</td></tr><tr><td>Total premiums and services revenue</td><td>$24,574</td><td>$21,418</td><td>$3,156</td><td>14.7%</td></tr><tr><td>Income before income taxes</td><td>$ 1,162</td><td>$ 1,587</td><td>$ (425)</td><td>(26.8)%</td></tr><tr><td>Benefit ratio</td><td>84.1%</td><td>81.2%</td><td></td><td>2.9%</td></tr><tr><td>Operating cost ratio</td><td>11.0%</td><td>11.2%</td><td></td><td>(0.2)%</td></tr></table>

## Pretax Results

- Retail segment pretax income was $1.2 billion in 2012, a decrease of $425 million, or 26.8%, from $1.6 billion in 2011, primarily driven by a year-over-year increase in the benefit ratio partially offset by improvement in the operating cost ratio as described below.

## Enrollment

- Individual Medicare Advantage membership increased 287,300 members, or 17.5%, from December 31, 2011 to December 31, 2012 primarily due to the 2012 enrollment season, as well as age-in enrollment throughout the year. We acquired approximately 62,600 members with Arcadian effective March 31, 2012. As discussed previously, we divested approximately 12,600 members acquired with Arcadian effective January 1, 2013 in accordance with our agreement with the United States Department of Justice.

- Individual Medicare stand-alone PDP membership increased 445,200 members, or 17.5%, from December 31, 2011 to December 31, 2012 primarily from higher gross sales during the 2012 enrollment season, particularly for our Humana-Walmart plan offering, supplemented by dual-eligible and age-in enrollments throughout the year.

- Individual specialty membership increased 166,200, or 21.2%, from December 31, 2011 to December 31, 2012 primarily driven by increased membership in dental offerings.

## Premiums revenue

- Retail segment premiums increased $3.1 billion, or 14.7%, from 2011 to 2012 primarily due to a 17.6% increase in average individual Medicare Advantage membership. Individual Medicare Advantage per member premiums decreased approximately 2% in 2012 compared to 2011, primarily driven by a higher percentage of members that aged-in that generally carry a lower risk score than other members and accordingly a lower premium per member as well as lower per member premiums for members.



acquired in connection with the Arcadian acquisition effective March 31, 2012. Individual Medicare stand-alone PDP premiums revenue increased $270 million, or 11.7%, in 2012 compared to 2011 primarily due to a 20.0% increase in average individual PDP membership, partially offset by a decrease in individual Medicare stand-alone PDP per member premiums. This was primarily a result of sales of our Humana-Walmart plan that we began offering for the 2011 plan year.

## Benefits expense

- The Retail segment benefit ratio increased 290 basis points from 81.2% in 2011 to 84.1% in 2012. During 2012, we experienced a significant increase in the benefit ratio for our individual Medicare Advantage products primarily due to a planned increase in the target benefit ratio associated with positioning for Health Insurance Reform Legislation funding changes and minimum benefit ratio requirements, a higher benefit ratio experienced on new membership than the assumptions used in our 2012 Medicare bids, and increased outpatient utilization for both new and existing members. In addition, year-over-year comparisons of the benefit ratio were negatively impacted by lower favorable prior-period medical claims reserve development in 2012 than in 2011 and a year-over-year increase in clinicians and other health care quality expenditures given our continuing growth in membership. The Retail segment’s pretax income for 2012 included the beneficial effect of $192 million in favorable prior-period medical claims reserve development versus $245 million in 2011. This favorable prior-period medical claims reserve development decreased the Retail segment benefit ratio by approximately 80 basis points in 2012 versus approximately 110 basis points in 2011.

## Operating costs

- The Retail segment operating cost ratio of 11.0% for 2012 decreased 20 basis points from 11.2% for 2011 primarily due to scale efficiencies associated with servicing higher year-over-year membership together with our continued focus on operating cost efficiencies, partially offset by higher year-over-year clinical, provider, and technological infrastructure spending.

## Employer Group Segment

<table><tr><td rowspan="2"></td><td rowspan="2">2012</td><td rowspan="2">2011</td><td colspan="2">Change</td></tr><tr><td>Members</td><td>Percentage</td></tr><tr><td>Membership:</td><td></td><td></td><td></td><td></td></tr><tr><td>Medical membership:</td><td></td><td></td><td></td><td></td></tr><tr><td>Fully-insured commercial group</td><td>1,211,800</td><td>1,180,200</td><td>31,600</td><td>2.7%</td></tr><tr><td>ASO</td><td>1,237,700</td><td>1,292,300</td><td>(54,600)</td><td>(4.2)%</td></tr><tr><td>Group Medicare Advantage</td><td>370,800</td><td>290,600</td><td>80,200</td><td>27.6%</td></tr><tr><td>Medicare Advantage ASO</td><td>27,700</td><td>27,600</td><td>100</td><td>0.4%</td></tr><tr><td>Total group Medicare Advantage</td><td>398,500</td><td>318,200</td><td>80,300</td><td>25.2%</td></tr><tr><td>Group Medicare stand-alone PDP</td><td>4,400</td><td>4,200</td><td>200</td><td>4.8%</td></tr><tr><td>Total group Medicare</td><td>402,900</td><td>322,400</td><td>80,500</td><td>25.0%</td></tr><tr><td>Total group medical members</td><td>2,852,400</td><td>2,794,900</td><td>57,500</td><td>2.1%</td></tr><tr><td>Group specialty membership (a)</td><td>7,136,200</td><td>6,532,600</td><td>603,600</td><td>9.2%</td></tr></table>

(a) Specialty products include dental, vision, and other supplemental health and financial protection products. Members included in these products may not be unique to each product since members have the ability to enroll in multiple products.



<table><tr><td rowspan="3"></td><td rowspan="3">2012</td><td rowspan="3">2011</td><td colspan="2">Change</td></tr><tr><td rowspan="2">Dollars</td><td rowspan="2">Percentage</td></tr><tr></tr><tr><td colspan="5">Premiums and Services Revenue:</td></tr><tr><td>Premiums:</td><td></td><td></td><td></td><td></td></tr><tr><td>Fully-insured commercial group</td><td>$ 4,996</td><td>$4,782</td><td>$ 214</td><td>4.5%</td></tr><tr><td>Group Medicare Advantage</td><td>4,064</td><td>3,152</td><td>912</td><td>28.9%</td></tr><tr><td>Group Medicare stand-alone PDP</td><td>8</td><td>8</td><td>0</td><td>0.0%</td></tr><tr><td>Total group Medicare</td><td>4,072</td><td>3,160</td><td>912</td><td>28.9%</td></tr><tr><td>Group specialty</td><td>1,070</td><td>935</td><td>135</td><td>14.4%</td></tr><tr><td>Total premiums</td><td>10,138</td><td>8,877</td><td>1,261</td><td>14.2%</td></tr><tr><td>Services</td><td>358</td><td>356</td><td>2</td><td>0.6%</td></tr><tr><td>Total premiums and services revenue</td><td>$10,496</td><td>$9,233</td><td>$1,263</td><td>13.7%</td></tr><tr><td>Income before income taxes</td><td>$ 253</td><td>$ 242</td><td>$ 11</td><td>4.5%</td></tr><tr><td>Benefit ratio</td><td>84.1%</td><td>82.4%</td><td></td><td>1.7%</td></tr><tr><td>Operating cost ratio</td><td>16.1%</td><td>17.8%</td><td></td><td>(1.7%)</td></tr></table>

## Pretax Results

- Employer Group segment pretax income increased $11 million, or 4.5%, to $253 million in 2012 primarily due to improvement in the operating cost ratio partially offset by an increase in the benefit ratio as described below.

## Enrollment

- Fully-insured commercial group medical membership increased 31,600 members, or 2.7%, from December 31, 2011 to December 31, 2012 primarily due to growth in small group membership partially offset by declines in large group business. Approximately 59% of our fully-insured commercial group medical membership was in small group accounts at December 31, 2012 compared to 56% at December 31, 2011.

- Fully-insured group Medicare Advantage membership increased 80,200 members, or 27.6%, from December 31, 2011 to December 31, 2012 primarily due to the January 2012 addition of a new large group retiree account.

- Group ASO commercial medical membership decreased 54,600 members, or 4.2%, from December 31, 2011 to December 31, 2012 primarily due to continued pricing discipline in a highly competitive environment for self-funded accounts.

- Group specialty membership increased 603,600 members, or 9.2%, from December 31, 2011 to December 31, 2012 primarily due to increased cross-selling of our specialty products to our medical membership and growth in stand-alone specialty product sales.

## Premiums revenue

- Employer Group segment premiums increased by $1.3 billion, or 14.2%, from 2011 to $10.1 billion for 2012 primarily due to higher average group Medicare Advantage and fully-insured commercial group medical membership. In addition, 2012 included the beneficial effect of approximately $25 million associated with revising estimates regarding calculations of 2011 premium rebates payable associated with minimum benefit ratios required under the Health Insurance Reform Legislation. This change in estimate was attributable to the refinement of the state-level calculations based on the run out of claims during 2012.



## Benefits expense

- The Employer Group segment benefit ratio of 84.1% for 2012 increased 170 basis points from 82.4% in 2011 primarily due to higher membership in our group Medicare Advantage products which generally carry a higher benefit ratio than our fully-insured commercial group products. In addition, year-over-year comparisons of the benefit ratio were negatively impacted by lower favorable prior-period medical claims reserve development in 2012 than in 2011. These increases were partially offset by the beneficial effect on the benefit ratio in 2012 of a reduction in prior-year premium rebate estimates discussed above. Fully-insured group Medicare Advantage members represented 13.0% of total Employer Group segment medical membership at December 31, 2012 compared to 10.4% at December 31, 2011. The Employer Group segment’s pretax income for 2012 included the beneficial effect of $48 million in favorable prior-period medical claims reserve development versus $114 million in 2011. This favorable prior-period medical claims reserve development decreased the Employer Group segment benefit ratio by approximately 50 basis points in 2012 versus approximately 130 basis points in 2011.

## Operating costs

- The Employer Group segment operating cost ratio of 16.1% for 2012 improved 170 basis points from 17.8% for 2011 primarily reflecting growth in our group Medicare Advantage products which generally carry a lower operating cost ratio than our fully-insured commercial group products and continued savings as a result of our operating cost reduction initiatives.

## Health and Well-Being Services Segment

<table><tr><td rowspan="2"></td><td rowspan="2">2012</td><td rowspan="2">2011 (in millions)</td><td colspan="2">Change</td></tr><tr><td>Dollars</td><td>Percentage</td></tr><tr><td>Revenues:</td><td></td><td></td><td></td><td></td></tr><tr><td>Services:</td><td></td><td></td><td></td><td></td></tr><tr><td>Provider services</td><td>$ 967</td><td>$ 880</td><td>$ 87</td><td>9.9%</td></tr><tr><td>Home care services</td><td>40</td><td>0</td><td>40</td><td>100.0%</td></tr><tr><td>Pharmacy solutions</td><td>16</td><td>11</td><td>5</td><td>45.5%</td></tr><tr><td>Integrated wellness services</td><td>13</td><td>12</td><td>1</td><td>8.3%</td></tr><tr><td>Total services revenues</td><td>1,036</td><td>903</td><td>133</td><td>14.7%</td></tr><tr><td>Intersegment revenues:</td><td></td><td></td><td></td><td></td></tr><tr><td>Pharmacy solutions</td><td>11,352</td><td>9,886</td><td>1,466</td><td>14.8%</td></tr><tr><td>Provider services</td><td>214</td><td>185</td><td>29</td><td>15.7%</td></tr><tr><td>Integrated wellness services</td><td>219</td><td>175</td><td>44</td><td>25.1%</td></tr><tr><td>Home care services</td><td>167</td><td>84</td><td>83</td><td>98.8%</td></tr><tr><td>Total intersegment revenues</td><td>11,952</td><td>10,330</td><td>1,622</td><td>15.7%</td></tr><tr><td>Total services and intersegment revenues</td><td>$12,988</td><td>$11,233</td><td>$1,755</td><td>15.6%</td></tr><tr><td>Income before income taxes</td><td>$ 486</td><td>$ 353</td><td>$ 133</td><td>37.7%</td></tr><tr><td>Operating cost ratio</td><td>95.5%</td><td>96.1%</td><td></td><td>(0.6)%</td></tr></table>

## Pretax results

- Health and Well-Being Services segment pretax income increased $133 million, or 37.7%, from 2011 to $486 million in 2012 primarily due to growth in our pharmacy solutions business, including higher utilization of our mail-order pharmacy by our members.



## Script Volume

- Script volumes for the Retail and Employer Group segment membership increased to approximately 238 million in 2012, up approximately 15.5% versus scripts of approximately 206 million in 2011. The year-over-year increase primarily reflects growth associated with higher average medical membership together with an increase in mail order penetration for our Retail segment medical membership in 2012 than in 2011.

## Services revenue

- Provider services revenue increased $87 million from 2011 to $967 million in 2012 primarily due to growth in our Concentra operations and the acquisition of SeniorBridge in July 2012.

## Intersegment revenues

- Intersegment revenues increased $1.6 billion, or 15.7%, from 2011 to $12.0 billion for 2012 primarily due to growth in our pharmacy solutions business, including our mail-order pharmacy, as it serves our growing membership, particularly Medicare stand-alone PDP.

## Operating costs

- The Health and Well-Being Services segment operating cost ratio improved 60 basis points from 2011 to 95.5% for 2012 reflecting scale efficiencies associated with growth in our pharmacy solutions business, including higher script volumes in our mail-order pharmacy business.

## Other Businesses

Pretax loss for our Other Businesses of $19 million for 2012 compared to pretax income of $84 million for 2011. The year-over-year decline primarily reflects the combined effect of costs in connection with a litigation settlement associated with our military services business in 2012, reserve strengthening for our closed block of long-term care policies in 2012, and a change in profitability under the new TRICARE South Region contract in connection with our bid strategy.



## Comparison of Results of Operations for 2011 and 2010

Certain financial data on a consolidated basis and for our segments was as follows for the years ended December 31, 2011 and 2010:

## Consolidated

<table><tr><td rowspan="2"></td><td rowspan="2">2011</td><td rowspan="2">2010</td><td colspan="2">Change</td></tr><tr><td>Dollars</td><td>Percentage</td></tr><tr><td>Revenues:</td><td></td><td></td><td></td><td></td></tr><tr><td>Premiums:</td><td></td><td></td><td></td><td></td></tr><tr><td>Retail</td><td>$21,402</td><td>$19,052</td><td>$2,350</td><td>12.3%</td></tr><tr><td>Employer Group</td><td>8,877</td><td>9,080</td><td>(203)</td><td>(2.2)%</td></tr><tr><td>Other Businesses</td><td>4,827</td><td>4,580</td><td>247</td><td>5.4%</td></tr><tr><td>Total premiums</td><td>35,106</td><td>32,712</td><td>2,394</td><td>7.3%</td></tr><tr><td>Services:</td><td></td><td></td><td></td><td></td></tr><tr><td>Retail</td><td>16</td><td>11</td><td>5</td><td>45.5%</td></tr><tr><td>Employer Group</td><td>356</td><td>395</td><td>(39)</td><td>(9.9)%</td></tr><tr><td>Health and Well-Being Services</td><td>903</td><td>34</td><td>869</td><td>nm</td></tr><tr><td>Other Businesses</td><td>85</td><td>115</td><td>(30)</td><td>(26.1)%</td></tr><tr><td>Total services</td><td>1,360</td><td>555</td><td>805</td><td>145.0%</td></tr><tr><td>Investment income</td><td>366</td><td>329</td><td>37</td><td>11.2%</td></tr><tr><td>Total revenues</td><td>36,832</td><td>33,596</td><td>3,236</td><td>9.6%</td></tr><tr><td>Operating expenses:</td><td></td><td></td><td></td><td></td></tr><tr><td>Benefits</td><td>28,823</td><td>27,117</td><td>1,706</td><td>6.3%</td></tr><tr><td>Operating costs</td><td>5,395</td><td>4,380</td><td>1,015</td><td>23.2%</td></tr><tr><td>Depreciation and amortization</td><td>270</td><td>245</td><td>25</td><td>10.2%</td></tr><tr><td>Total operating expenses</td><td>34,488</td><td>31,742</td><td>2,746</td><td>8.7%</td></tr><tr><td>Income from operations</td><td>2,344</td><td>1,854</td><td>490</td><td>26.4%</td></tr><tr><td>Interest expense</td><td>109</td><td>105</td><td>4</td><td>3.8%</td></tr><tr><td>Income before income taxes</td><td>2,235</td><td>1,749</td><td>486</td><td>27.8%</td></tr><tr><td>Provision for income taxes</td><td>816</td><td>650</td><td>166</td><td>25.5%</td></tr><tr><td>Net income</td><td>$ 1,419</td><td>$ 1,099</td><td>$ 320</td><td>29.1%</td></tr><tr><td>Diluted earnings per common share</td><td>$ 8.46</td><td>$ 6.47</td><td>$ 1.99</td><td>30.8%</td></tr><tr><td>Benefit ratio (a)</td><td>82.1%</td><td>82.9%</td><td></td><td>(0.8)%</td></tr><tr><td>Operating cost ratio (b)</td><td>14.8%</td><td>13.2%</td><td></td><td>1.6%</td></tr><tr><td>Effective tax rate</td><td>36.5%</td><td>37.2%</td><td></td><td>(0.7)%</td></tr></table>

(a) Represents total benefits expense as a percentage of premiums revenue.

(b) Represents total operating costs as a percentage of total revenues less investment income.

nm – not meaningful

## Summary

Net income was $1.4 billion, or $8.46 per diluted common share, in 2011 compared to $1.1 billion, or $6.47 per diluted common share, in 2010 primarily due to improved operating performance in the Retail and Health and Well-Being Services segments and the negative impact of certain charges described below on 2010 results that did not recur in 2011. Share repurchase activity also contributed to the year-over-year increase in diluted



earnings per common share. Net income for 2010 included the negative impact of a $147 million ($0.55 per diluted common share) write-down of deferred acquisition costs associated with our individual commercial medical policies in our Retail Segment, and a net charge of $139 million ($0.52 per diluted common share) for reserve strengthening associated with our closed block of long-term care policies in our Other Businesses as discussed in Note 17 to the consolidated financial statements included in Item 8. – Financial Statements and Supplementary Data.

## Premiums Revenue

Consolidated premiums increased $2.4 billion, or 7.3%, from 2010 to $35.1 billion for 2011, primarily due to an increase in Retail segment premiums, partially offset by a decline in Employer Group segment premiums. The increase in Retail segment premiums primarily resulted from higher average individual Medicare Advantage membership. The decrease in Employer Group segment premiums primarily resulted from lower average fully-insured commercial group medical membership.

## Services Revenue

Consolidated services revenue increased $805 million, or 145.0%, from 2010 to $1.4 billion for 2011, primarily due to an increase in provider services revenue in our Health and Well-Being Services segment, primarily as a result of the acquisition of Concentra on December 21, 2010.

## Investment Income

Investment income totaled $366 million for 2011, an increase of $37 million from 2010, primarily reflecting higher interest rates as well as higher average invested balances as a result of the reinvestment of operating cash flows.

## Benefits Expense

Consolidated benefits expense was $28.8 billion for 2011, an increase of $1.7 billion, or 6.3%, from 2010. The increases were primarily due to a $1.8 billion, or 11.3%, year-over-year increase in Retail segment benefits expense in 2011, primarily driven by an increase in the average number of Medicare members, partially offset by a decline in Employer Group segment benefits expense. We experienced favorable medical claims reserve development related to prior fiscal years of $372 million in 2011 and $434 million in 2010.

The consolidated benefit ratio for 2011 was 82.1%, declining 80 basis points from the 2010 benefit ratio of 82.9%, primarily driven by a decline in the Retail segment benefit ratio and a net charge for reserve strengthening associated with our closed block of long-term care policies in our Other Businesses in 2010 that did not recur in 2011. Year-over-year comparisons of the benefit ratio were negatively impacted by the $62 million decline in favorable prior-period medical claims reserve development from 2010 to 2011.

## Operating Costs

Our segments incur both direct and shared indirect operating costs. We allocate the indirect costs shared by the segments primarily as a function of revenues. As a result, the profitability of each segment is interdependent.

Consolidated operating costs increased $1.0 billion, or 23.2%, during 2011 compared to 2010, primarily due to an increase in operating costs in our Health and Well-Being Segment as a result of the acquisition of Concentra on December 21, 2010, as well as an increase in operating costs in our Retail segment as a result of increased expenses associated with servicing higher average Medicare Advantage membership. Operating costs for 2010 include $147 million for the write-down of deferred acquisition costs associated with our individual commercial medical policies in our Retail Segment.



The consolidated operating cost ratio for 2011 was 14.8%, increasing 160 basis points from the 2010 operating cost ratio of 13.2%. The $147 million write-down of deferred acquisition costs in 2010 increased the operating cost ratio 50 basis points for 2010. Excluding the impact of the write-down of deferred acquisition costs in 2010, the increase primarily reflects the greater percentage of our revenues derived from Concentra, acquired December 21, 2010, in our Health and Well-Being Services segment, which carries a higher operating cost ratio on external revenues than our other segments, as well as an increase in the Retail and Employer Group segment operating cost ratios.

## Depreciation and Amortization

Depreciation and amortization for 2011 totaled $270 million, an increase of $25 million, or 10.2%, from 2010, primarily reflecting depreciation and amortization expense associated with our Concentra operations, acquired on December 21, 2010.

## Interest Expense

Interest expense was $109 million for 2011, compared to $105 million for 2010, an increase of $4 million, or 3.8%.

## Income Taxes

Our effective tax rate during 2011 was 36.5% compared to the effective tax rate of 37.2% in 2010. The higher tax rate for 2010 primarily was due to the cumulative adjustment associated with estimating the retrospective aspect of new limitations on the deductibility of annual compensation in excess of $500,000 per employee as mandated by the Health Insurance Reform Legislation. See Note 10 to the consolidated financial statements included in Item 8. – Financial Statements and Supplementary Data for a complete reconciliation of the federal statutory rate to the effective tax rate.

## Retail Segment

<table><tr><td rowspan="2"></td><td rowspan="2">2011</td><td rowspan="2">2010</td><td colspan="2">Change</td></tr><tr><td>Members</td><td>Percentage</td></tr><tr><td>Membership:</td><td></td><td></td><td></td><td></td></tr><tr><td>Medical membership:</td><td></td><td></td><td></td><td></td></tr><tr><td>Individual Medicare Advantage</td><td>1,640,300</td><td>1,460,700</td><td>179,600</td><td>12.3%</td></tr><tr><td>Individual Medicare stand-alone PDP</td><td>2,540,400</td><td>1,670,300</td><td>870,100</td><td>52.1%</td></tr><tr><td>Total individual Medicare</td><td>4,180,700</td><td>3,131,000</td><td>1,049,700</td><td>33.5%</td></tr><tr><td>Individual commercial</td><td>493,200</td><td>411,200</td><td>82,000</td><td>19.9%</td></tr><tr><td>Total individual medical members</td><td>4,673,900</td><td>3,542,200</td><td>1,131,700</td><td>31.9%</td></tr><tr><td>Individual specialty membership (a)</td><td>782,500</td><td>510,000</td><td>272,500</td><td>53.4%</td></tr></table>



<table><tr><td rowspan="2"></td><td rowspan="2">2011</td><td rowspan="2">2010 (in millions)</td><td colspan="2">Change</td></tr><tr><td>Dollars</td><td>Percentage</td></tr><tr><td>Premiums and Services Revenue:</td><td></td><td></td><td></td><td></td></tr><tr><td>Premiums:</td><td></td><td></td><td></td><td></td></tr><tr><td>Individual Medicare Advantage</td><td>$18,100</td><td>$16,265</td><td>$1,835</td><td>11.3%</td></tr><tr><td>Individual Medicare stand-alone PDP</td><td>2,317</td><td>1,959</td><td>358</td><td>18.3%</td></tr><tr><td>Total individual Medicare</td><td>20,417</td><td>18,224</td><td>2,193</td><td>12.0%</td></tr><tr><td>Individual commercial</td><td>861</td><td>746</td><td>115</td><td>15.4%</td></tr><tr><td>Individual specialty</td><td>124</td><td>82</td><td>42</td><td>51.2%</td></tr><tr><td>Total premiums</td><td>21,402</td><td>19,052</td><td>2,350</td><td>12.3%</td></tr><tr><td>Services</td><td>16</td><td>11</td><td>5</td><td>45.5%</td></tr><tr><td>Total premiums and services revenue</td><td>$21,418</td><td>$19,063</td><td>$2,355</td><td>12.4%</td></tr><tr><td>Income before income taxes</td><td>$ 1,587</td><td>$ 1,289</td><td>$ 298</td><td>23.1%</td></tr><tr><td>Benefit ratio</td><td>81.2%</td><td>82.0%</td><td></td><td>(0.8)%</td></tr><tr><td>Operating cost ratio</td><td>11.2%</td><td>11.1%</td><td></td><td>0.1%</td></tr></table>

## Pretax Results

- Retail segment pretax income was $1.6 billion in 2011, an increase of $298 million, or 23.1%, from $1.3 billion in 2010, primarily driven by higher average individual Medicare membership and a lower benefit ratio, partially offset by a higher operating cost ratio, discussed below. Pretax income for 2010 included the negative impact of a $147 million write-down of deferred acquisition costs associated with our individual commercial medical policies.

## Enrollment

- Individual Medicare Advantage membership increased 179,600 members, or 12.3%, from December 31, 2010 to December 31, 2011 due to the 2011 enrollment season as well as age-in enrollment throughout the year. Individual Medicare Advantage membership at December 31, 2011 included approximately 12,100 members acquired with an acquisition effective December 30, 2011.

- Individual Medicare stand-alone PDP membership increased 870,100 members, or 52.1%, from December 31, 2010 to December 31, 2011 primarily from higher gross sales year-over-year, particularly due to our Humana-Walmart plan that we began offering for the 2011 plan year, supplemented by dual eligible and age-in enrollments throughout the year.

- Individual specialty membership increased 272,500, or 53.4%, from December 31, 2010 to December 31, 2011 primarily driven by increased sales in dental offerings.

## Premiums revenue

- Retail segment premiums increased $2.4 billion, or 12.3%, from 2010 to 2011 primarily due to a 10.3% increase in average individual Medicare Advantage membership. Individual Medicare stand-alone PDP premiums revenue increased $358 million, or 18.3%, in 2011 compared to 2010 primarily due to a 41.9% increase in average individual PDP membership, partially offset by a decrease in individual Medicare stand-alone PDP per member premiums. This was primarily a result of sales of our Humana-Walmart plan that we began offering for the 2011 plan year.

## Benefits expense

- The Retail segment benefit ratio decreased 80 basis points from 82.0% in 2010 to 81.2% in 2011. The decline primarily reflects a lower Medicare Advantage benefit ratio due to lower cost trends arising out of our cost-reduction and outcome-enhancing strategies, including care coordination and care



management, as well as a significant increase in our individual Medicare stand-alone PDP membership in 2011 that carries a lower benefit ratio, partially offset by lower favorable prior-period medical claims reserve development in 2011 than in 2010. The Retail segment’s pretax income for 2011 included the beneficial effect of $245 million in favorable prior-period medical claims reserve development versus $343 million in 2010. This favorable prior-period medical claims reserve development decreased the Retail segment benefit ratio by approximately 110 basis points in 2011 versus approximately 180 basis points in 2010.

## Operating costs

- The Retail segment operating cost ratio of 11.2% for 2011 increased 10 basis points from 11.1% for 2010. The $147 million write-down of deferred acquisition costs in 2010 increased the operating cost ratio 80 basis points in 2010. Excluding the impact of the write-down of deferred acquisition costs, the increase in the operating cost ratio year-over-year primarily reflects increased expenses associated with the Medicare sales season for 2012 offerings which began a month earlier than in the prior year and staffing necessary to service anticipated Medicare membership additions. Further, a higher percentage of membership in individual Medicare stand-alone PDP products contributed to the higher operating cost ratio, in light of the Humana-Walmart plan, first offered in 2011, which carries a higher operating cost ratio than other Medicare products.

## Employer Group Segment

<table><tr><td rowspan="2"></td><td rowspan="2">2011</td><td rowspan="2">2010</td><td colspan="2">Change</td></tr><tr><td>Members</td><td>Percentage</td></tr><tr><td>Membership:</td><td></td><td></td><td></td><td></td></tr><tr><td>Medical membership:</td><td></td><td></td><td></td><td></td></tr><tr><td>Fully-insured commercial group</td><td>1,180,200</td><td>1,252,200</td><td>(72,000)</td><td>(5.7)%</td></tr><tr><td>ASO</td><td>1,292,300</td><td>1,453,600</td><td>(161,300)</td><td>(11.1)%</td></tr><tr><td>Group Medicare Advantage</td><td>290,600</td><td>273,100</td><td>17,500</td><td>6.4%</td></tr><tr><td>Medicare Advantage ASO</td><td>27,600</td><td>28,200</td><td>(600)</td><td>(2.1)%</td></tr><tr><td>Total group Medicare Advantage</td><td>318,200</td><td>301,300</td><td>16,900</td><td>5.6%</td></tr><tr><td>Group Medicare stand-alone PDP</td><td>4,200</td><td>2,400</td><td>1,800</td><td>75.0%</td></tr><tr><td>Total group Medicare</td><td>322,400</td><td>303,700</td><td>18,700</td><td>6.2%</td></tr><tr><td>Total group medical members</td><td>2,794,900</td><td>3,009,500</td><td>(214,600)</td><td>(7.1)%</td></tr><tr><td>Group specialty membership (a)</td><td>6,532,600</td><td>6,517,500</td><td>15,100</td><td>0.2%</td></tr></table>

(a) Specialty products include dental, vision, and other supplemental health and financial protection products. Members included in these products may not be unique to each product since members have the ability to enroll in multiple products.



<table><tr><td rowspan="2"></td><td rowspan="2">2011</td><td rowspan="2">2010 (in millions)</td><td colspan="2">Change</td></tr><tr><td>Dollars</td><td>Percentage</td></tr><tr><td>Premiums:</td><td></td><td></td><td></td><td></td></tr><tr><td>Fully-insured commercial group</td><td>$4,782</td><td>$5,169</td><td>$(387)</td><td>(7.5)%</td></tr><tr><td>Group Medicare Advantage</td><td>3,152</td><td>3,021</td><td>131</td><td>4.3%</td></tr><tr><td>Group Medicare stand-alone PDP</td><td>8</td><td>5</td><td>3</td><td>60.0%</td></tr><tr><td>Total group Medicare</td><td>3,160</td><td>3,026</td><td>134</td><td>4.4%</td></tr><tr><td>Group specialty</td><td>935</td><td>885</td><td>50</td><td>5.6%</td></tr><tr><td>Total premiums</td><td>8,877</td><td>9,080</td><td>(203)</td><td>(2.2)%</td></tr><tr><td>Services</td><td>356</td><td>395</td><td>(39)</td><td>(9.9)%</td></tr><tr><td>Total premiums and services revenue</td><td>$9,233</td><td>$9,475</td><td>$(242)</td><td>(2.6)%</td></tr><tr><td>Income before income taxes</td><td>$242</td><td>$288</td><td>$(46)</td><td>(16.0)%</td></tr><tr><td>Benefit ratio</td><td>82.4%</td><td>82.4%</td><td></td><td>0.0%</td></tr><tr><td>Operating cost ratio</td><td>17.8%</td><td>17.5%</td><td></td><td>0.3%</td></tr></table>

## Pretax Results

- Employer Group segment pretax income decreased $46 million, or 16%, to $242 million in 2011 primarily due to the impact of minimum benefit ratios required under the Health Insurance Reform Legislation which became effective in 2011.

## Enrollment

- Fully-insured commercial group medical membership decreased 72,000 members, or 5.7%, from December 31, 2010 to December 31, 2011 primarily due to continued pricing discipline in a highly competitive environment for large group business partially offset by small group business membership gains.

- Group ASO commercial medical membership decreased 161,300 members, or 11.1%, from December 31, 2010 to December 31, 2011 primarily due to continued pricing discipline in a highly competitive environment for self-funded accounts.

## Premiums revenue

- Employer Group segment premiums decreased by $203 million, or 2.2%, from 2010 to $8.9 billion for 2011 primarily due to lower average commercial group medical membership year-over-year and rebates associated with minimum benefit ratios required under the Health Insurance Reform Legislation which became effective in 2011, partially offset by an increase in group Medicare Advantage membership. Rebates result in the recognition of lower premiums revenue, as amounts are set aside for payments to commercial customers during the following year.

## Benefits expense

- The Employer Group segment benefit ratio of 82.4% for 2011 was unchanged from 2010 due to offsetting factors. Factors increasing the 2011 ratio compared to the 2010 ratio include growth in our group Medicare Advantage products which generally carry a higher benefit ratio than our fully-insured commercial group products and the effect of rebates accrued in 2011 associated with the minimum benefit ratios required under the Health Insurance Reform Legislation. Factors decreasing the 2011 ratio compared to the 2010 ratio include the beneficial effect of higher favorable prior-period medical claims reserve development in 2011 versus 2010 and lower utilization of benefits in our commercial group.



products in 2011. Fully-insured group Medicare Advantage members represented 10.4% of total Employer Group segment medical membership at December 31, 2011 compared to 9.1% at December 31, 2010. The Employer Group segment’s pretax income for 2011 included the beneficial effect of 114 million in favorable prior-period medical claims reserve development versus 73 million in 2010. This favorable prior-period medical claims reserve development decreased the Employer Group segment benefit ratio by approximately 130 basis points in 2011 versus approximately 80 basis points in 2010.

## Operating costs

- The Employer Group segment operating cost ratio of 17.8% for 2011 increased 30 basis points from 17.5% for 2010 primarily reflecting the impact of lower premiums revenue due to the minimum benefit ratio regulatory requirements which became effective in 2011.

## Health and Well-Being Services Segment

<table><tr><td rowspan="2"></td><td rowspan="2">2011</td><td rowspan="2">2010</td><td colspan="2">Change</td></tr><tr><td>Dollars</td><td>Percentage</td></tr><tr><td>Revenues:</td><td></td><td></td><td></td><td></td></tr><tr><td>Services:</td><td></td><td></td><td></td><td></td></tr><tr><td>Provider services</td><td>$ 880</td><td>$ 21</td><td>$ 859</td><td>nm</td></tr><tr><td>Integrated wellness services</td><td>12</td><td>13</td><td>(1)</td><td>(7.7)%</td></tr><tr><td>Pharmacy solutions</td><td>11</td><td>0</td><td>11</td><td>100.0%</td></tr><tr><td>Total services revenues</td><td>903</td><td>34</td><td>869</td><td>nm</td></tr><tr><td>Intersegment revenues:</td><td></td><td></td><td></td><td></td></tr><tr><td>Pharmacy solutions</td><td>9,886</td><td>8,410</td><td>1,476</td><td>17.6%</td></tr><tr><td>Provider services</td><td>185</td><td>170</td><td>15</td><td>8.8%</td></tr><tr><td>Integrated wellness services</td><td>175</td><td>167</td><td>8</td><td>4.8%</td></tr><tr><td>Home care services</td><td>84</td><td>39</td><td>45</td><td>115.4%</td></tr><tr><td>Total intersegment revenues</td><td>10,330</td><td>8,786</td><td>1,544</td><td>17.6%</td></tr><tr><td>Total services and intersegment revenues</td><td>$11,233</td><td>$8,820</td><td>$2,413</td><td>27.4%</td></tr><tr><td>Income before income taxes</td><td>$ 353</td><td>$ 219</td><td>$ 134</td><td>61.2%</td></tr><tr><td>Operating cost ratio</td><td>96.1%</td><td>97.2%</td><td></td><td>(1.1)%</td></tr></table>

nm – not meaningful

## Pretax results

- Health and Well-Being Services segment pretax income increased $134 million, or 61.2%, from 2010 to $353 million in 2011 primarily due to growth in our pharmacy solutions business together with the addition of the Concentra business, acquired on December 21, 2010.

## Services revenue

- Provider services revenue increased $859 million from 2010 to $880 million in 2011 primarily due to the acquisition of Concentra on December 21, 2010.

## Intersegment revenues

- Intersegment revenues increased $1.5 billion, or 17.6%, from 2010 to $10.3 billion for 2011 primarily due to growth in our pharmacy solutions business as it serves our growing membership, particularly Medicare stand-alone PDP.



## Operating costs

- The Health and Well-Being Services segment operating cost ratio decreased 110 basis points from 2010 to 96.1% for 2011 reflecting scale efficiencies associated with growth in our pharmacy solutions business together with the addition of our acquired Concentra operations which carry a lower operating cost ratio than other lines of business in this segment.

## Other Businesses

Pretax income for our Other Businesses of $84 million for 2011 compared to pretax losses of $2 million for 2010. Pretax losses for 2010 include the impact of a net charge of $139 million associated with reserve strengthening for our closed block of long-term care policies. Excluding this charge, the year-over-year decline primarily reflects a decrease in pretax income associated with our contract with CMS to administer the LI-NET program.

## Liquidity

Our primary sources of cash include receipts of premiums, services revenue, and investment and other income, as well as proceeds from the sale or maturity of our investment securities and borrowings. Our primary uses of cash include disbursements for claims payments, operating costs, interest on borrowings, taxes, purchases of investment securities, acquisitions, capital expenditures, repayments on borrowings, dividends, and share repurchases. Because premiums generally are collected in advance of claim payments by a period of up to several months, our business normally should produce positive cash flows during periods of increasing premiums and enrollment. Conversely, cash flows would be negatively impacted during periods of decreasing premiums and enrollment. From period to period, our cash flows may also be affected by the timing of working capital items. The use of operating cash flows may be limited by regulatory requirements which require, among other items, that our regulated subsidiaries maintain minimum levels of capital and seek approval before paying dividends from the subsidiaries to the parent.

Cash and cash equivalents decreased to $1.3 billion at December 31, 2012 from $1.4 billion at December 31, 2011. The change in cash and cash equivalents for the years ended December 31, 2012, 2011 and 2010 is summarized as follows:

<table><tr><td></td><td>2012</td><td>2011 (in millions)</td><td>2010</td></tr><tr><td>Net cash provided by operating activities</td><td>$ 1,923</td><td>$ 2,079</td><td>$ 2,242</td></tr><tr><td>Net cash used in investing activities</td><td>(1,965)</td><td>(1,358)</td><td>(1,811)</td></tr><tr><td>Net cash used in financing activities</td><td>(29)</td><td>(1,017)</td><td>(371)</td></tr><tr><td>(Decrease) increase in cash and cash equivalents</td><td>$ (71)</td><td>$ (296)</td><td>$ 60</td></tr></table>

## Cash Flow from Operating Activities

The change in operating cash flows over the three year period primarily results from the corresponding change in earnings, enrollment activity, and changes in working capital items as discussed below. Cash flows were positively impacted by Medicare enrollment gains in 2012, 2011, and 2010 because premiums generally are collected in advance of claim payments by a period of up to several months.

Comparisons of our operating cash flows also are impacted by other changes in our working capital. The most significant drivers of changes in our working capital are typically the timing of receipts for premiums and payments of benefits expense. We illustrate these changes with the following summaries of receivables and benefits payable.



The detail of total net receivables was as follows at December 31, 2012, 2011 and 2010:

<table><tr><td rowspan="3"></td><td rowspan="3">2012</td><td rowspan="3">2011</td><td rowspan="3">2010</td><td colspan="4">Change</td></tr><tr><td colspan="2">2012</td><td>2011</td><td>2010</td></tr><tr><td colspan="4">(in millions)</td></tr><tr><td>Medicare</td><td>$422</td><td>$336</td><td>$216</td><td>$86</td><td>$120</td><td>$(22)</td><td></td></tr><tr><td>Commercial and other</td><td>346</td><td>315</td><td>368</td><td>31</td><td>(53)</td><td>185</td><td></td></tr><tr><td>Military services</td><td>59</td><td>468</td><td>427</td><td>(409)</td><td>41</td><td>(26)</td><td></td></tr><tr><td>Allowance for doubtful accounts</td><td>(94)</td><td>(85)</td><td>(52)</td><td>(9)</td><td>(33)</td><td>(1)</td><td></td></tr><tr><td>Total net receivables</td><td>$733</td><td>$1,034</td><td>$959</td><td>(301)</td><td>75</td><td>136</td><td></td></tr><tr><td>Reconciliation to cash flow statement:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Provision for doubtful accounts</td><td></td><td></td><td></td><td>26</td><td>31</td><td>19</td><td></td></tr><tr><td>Receivables from acquisition</td><td></td><td></td><td></td><td>(51)</td><td>0</td><td>(109)</td><td></td></tr><tr><td>Change in receivables per cash flow statement resulting in cash from operations</td><td></td><td></td><td></td><td>(326)</td><td>$106</td><td>$46</td><td></td></tr></table>

Medicare receivables are impacted by revenue growth associated with growth in individual and group Medicare membership and the timing of accruals and related collections associated with the CMS risk-adjustment model.

Military services receivables at December 31, 2011 and December 31, 2010 primarily consisted of estimated claims owed from the federal government for health care services provided to beneficiaries and underwriting fees under our previous TRICARE South Region contract that expired on March 31, 2012. The claim reimbursement component of military services base receivables is generally collected over a three to four month period. The timing of claim reimbursements resulted in the $41 million increase in base receivables for 2011 as compared to 2010 and the $26 million decrease in base receivables for 2010 as compared to 2009. The $409 million decrease in military services receivables from December 31, 2011 to December 31, 2012 primarily resulted from the transition to our new TRICARE South Region contract which we account for similar to an administrative services fee only agreement. As such, beginning April 1, 2012, payments of the federal government’s claims and related reimbursements for the new TRICARE South Region contract are classified with receipts (withdrawals) from contract deposits as a financing item in our consolidated statements of cash flows. Military services receivables at December 31, 2012 primarily consist of administrative services only fees owed from the federal government for administrative services provided under our new TRICARE South Region contract.

Commercial and other receivables for 2012, 2011, and 2010 include $166 million, $144 million, and $109 million, respectively, of patient services receivables acquired with the acquisition of Concentra in December 2010. In addition, the allowance for doubtful accounts increased $33 million from 2010 to 2011. The increase in Concentra receivables in 2010 and the related allowance in 2011 result from the requirement to record acquired balances at fair value at the acquisition date. Excluding the receivables acquired with Concentra, commercial and other receivables reflect the timing of reimbursements from the Puerto Rico Health Insurance Administration for our Medicaid business.



The detail of benefits payable was as follows at December 31, 2012, 2011 and 2010:

<table><tr><td rowspan="3"></td><td rowspan="3">2012</td><td rowspan="3">2011</td><td rowspan="3">2010</td><td colspan="4">Change</td></tr><tr><td colspan="2">2012</td><td>2011</td><td>2010</td></tr><tr><td colspan="4">(in millions)</td></tr><tr><td>IBNR (1)</td><td>$2,552</td><td>$2,056</td><td>$2,051</td><td>$496</td><td>$ 5</td><td>$ 148</td><td></td></tr><tr><td>Reported claims in process (2)</td><td>315</td><td>376</td><td>137</td><td>(61)</td><td>239</td><td>(221)</td><td></td></tr><tr><td>Military services benefits payable (3)</td><td>4</td><td>339</td><td>255</td><td>(335)</td><td>84</td><td>(24)</td><td></td></tr><tr><td>Other benefits payable (4)</td><td>908</td><td>983</td><td>1,026</td><td>(75)</td><td>(43)</td><td>344</td><td></td></tr><tr><td>Total benefits payable</td><td>$3,779</td><td>$3,754</td><td>$3,469</td><td>25</td><td>285</td><td>247</td><td></td></tr><tr><td>Payables from acquisition</td><td></td><td></td><td></td><td>(66)</td><td>(29)</td><td>0</td><td></td></tr><tr><td>Change in benefits payable per cash flow statement resulting in cash from operations</td><td></td><td></td><td></td><td>$ (41)</td><td>$256</td><td>$ 247</td><td></td></tr></table>

(1) IBNR represents an estimate of benefits payable for claims incurred but not reported (IBNR) at the balance sheet date. The level of IBNR is primarily impacted by membership levels, medical claim trends and the receipt cycle time, which represents the length of time between when a claim is initially incurred and when the claim form is received (i.e. a shorter time span results in a lower IBNR).

(2) Reported claims in process represents the estimated valuation of processed claims that are in the post claim adjudication process, which consists of administrative functions such as audit and check batching and handling, as well as amounts owed to our pharmacy benefit administrator which fluctuate due to bi-weekly payments and the month-end cutoff.

(3) Military services benefits payable primarily represents the run-out of the claims liability associated with our previous TRICARE South Region contract that expired on March 31, 2012. A corresponding receivable for reimbursement by the federal government is included in the military services receivable in the receivables table that follows.

(4) Other benefits payable include amounts owed to providers under capitated and risk sharing arrangements.

The increase in benefits payable in 2012 primarily was due to an increase in IBNR, primarily as a result of Medicare Advantage membership growth, partially offset by a $335 million decrease in the military services benefits payable due to the run-out of claims under the previous TRICARE South Region contract that expired on March 31, 2012, a decrease in amounts owed to providers under capitated and risk sharing arrangements, and a decrease in the amounts due to our pharmacy benefit administrator which fluctuate due to month-end cutoff. Under the new TRICARE South Region contract effective April 1, 2012, the federal government retains the risk of the cost of health benefits and related benefit obligation as further described in Note 2 to the consolidated financial statements included in Item 8. – Financial Statements and Supplementary Data. The increase in benefits payable in 2011 primarily was due to an increase in processed but unpaid claims, including amounts due to our pharmacy benefit administrator, which fluctuate due to month-end cutoff, and an increase in military services benefits payable. The increase in benefits payable in 2010 primarily was due to an increase in amounts owed to providers under capitated and risk sharing arrangements as well as an increase in IBNR, both primarily as a result of Medicare Advantage membership growth, partially offset by a decrease in the amount of processed but unpaid claims, including pharmacy claims, which fluctuate due to the month-end cutoff.

In addition to the timing of receipts for premiums and services fees and payments of benefits expense, other working capital items impacting operating cash flows primarily resulted from the timing of payments for the Medicare Part D risk corridor provisions of our contracts with CMS, changes in the timing of the collection of pharmacy rebates, and the timing of payments for premium rebates associated with minimum benefit ratios required under the Health Insurance Reform Legislation.



## Cash Flow from Investing Activities

Cash consideration paid for acquisitions, net of cash acquired, of $1,235 million in 2012, $226 million in 2011, and $833 million in 2010 primarily related to the Metropolitan, Arcadian, SeniorBridge and other health and wellness and technology related acquisitions in 2012, Anvita and other Retail segment acquisitions in 2011, and the Concentra acquisition in 2010.

We reinvested a portion of our operating cash flows in investment securities, primarily investment-grade fixed income securities, totaling $320 million in 2012, $796 million in 2011, and $756 million in 2010.

Our ongoing capital expenditures primarily relate to our information technology initiatives, support of services in our provider services operations including medical and administrative facility improvements necessary for activities such as the provision of care to members, claims processing, billing and collections, wellness solutions, care coordination, regulatory compliance and customer service. Total capital expenditures, excluding acquisitions, were $410 million in 2012, $346 million in 2011, and $222 million in 2010, with 2012 and 2011 reflecting increased spending associated with growth in our provider services and pharmacy businesses in our Health and Well-Being Services segment. Excluding acquisitions, we expect total capital expenditures in 2013 in a range of approximately $425 million to $450 million.

## Cash Flow from Financing Activities

In December 2012, we issued $600 million of 3.15% senior notes due December 1, 2022 and $400 million of 4.625% senior notes due December 1, 2042. Our net proceeds, reduced for the discount and cost of the offering, were $990 million. We used the proceeds from the offering primarily to finance the acquisition of Metropolitan, including the retirement of Metropolitan’s indebtedness, and to pay related fees and expenses.

In March 2012, we repaid, without penalty, junior subordinated long-term debt of $36 million.

Receipts from CMS associated with Medicare Part D claim subsidies for which we do not assume risk were $341 million less than claims payments during 2012, $378 million less than claim payments during 2011, and $237 million less than claims payments during 2010. Under our new administrative services only TRICARE South Region contract that began April 1, 2012, health care cost payments for which we do not assume risk exceeded reimbursements from the federal government by $56 million in 2012. See Note 2 to the consolidated financial statements included in Item 8. – Financial Statements and Supplementary Data for further description.

We repurchased 6.25 million shares for $460 million in 2012, 6.8 million shares for $492 million in 2011, and 1.99 million shares for $100 million in 2010 under share repurchase plans authorized by the Board of Directors. We also acquired common shares in connection with employee stock plans for an aggregate cost of $58 million in 2012, $49 million in 2011, and $8 million in 2010.

During 2012, we paid dividends to stockholders of $165 million as discussed further below. We paid dividends to stockholders of $82 million during 2011. No dividends were paid during 2010.

The remainder of the cash used in or provided by financing activities in 2012, 2011, and 2010 primarily resulted from proceeds from stock option exercises and the change in book overdraft.

## Future Sources and Uses of Liquidity

## Dividends

In April 2011, our Board of Directors approved the initiation of a quarterly cash dividend policy. Declaration and payment of future dividends is at the discretion of our Board of Directors, and may be adjusted as business or market conditions change.



The following table provides details of dividend payments in 2011 and 2012:

<table><tr><td>Record Date</td><td>Payment Date</td><td>Amount per Share</td><td>Total Amount (in millions)</td></tr><tr><td>2011 payments</td><td></td><td></td><td></td></tr><tr><td>6/30/2011</td><td>7/28/2011</td><td>$0.25</td><td>$41</td></tr><tr><td>9/30/2011</td><td>10/28/2011</td><td>$0.25</td><td>$41</td></tr><tr><td>2012 payments</td><td></td><td></td><td></td></tr><tr><td>12/30/2011</td><td>1/31/2012</td><td>$0.25</td><td>$41</td></tr><tr><td>3/30/2012</td><td>4/27/2012</td><td>$0.25</td><td>$41</td></tr><tr><td>6/29/2012</td><td>7/27/2012</td><td>$0.26</td><td>$42</td></tr><tr><td>9/28/2012</td><td>10/26/2012</td><td>$0.26</td><td>$41</td></tr></table>

In October 2012, the Board of Directors declared a cash dividend of $0.26 per share that was paid on January 25, 2013, for an aggregate amount of $42 million, to stockholders of record as of the close of business on December 31, 2012.

## Stock Repurchase Authorization

In April 2012, the Board of Directors replaced its previously approved share repurchase authorization of up to $1 billion (of which $461 million remained unused) with the current authorization for repurchases of up to $1 billion of our common shares exclusive of shares repurchased in connection with employee stock plans. The current authorization will expire June 30, 2014. Under this share repurchase authorization, shares may be purchased from time to time at prevailing prices in the open market, by block purchases, or in privately-negotiated transactions, subject to certain regulatory restrictions on volume, pricing, and timing. As of February 1, 2013, the remaining authorized amount under the current authorization totaled $640 million.

## Senior Notes

In December 2012, we issued $600 million of 3.15% senior notes due December 1, 2022 and $400 million of 4.625% senior notes due December 1, 2042. Our net proceeds, reduced for the discount and cost of the offering, were $990 million. We used the proceeds from the offering primarily to finance the acquisition of Metropolitan, including the retirement of Metropolitan's indebtedness, and to pay related fees and expenses. We previously issued $500 million of 6.45% senior notes due June 1, 2016, $500 million of 7.20% senior notes due June 15, 2018, $300 million of 6.30% senior notes due August 1, 2018, and $250 million of 8.15% senior notes due June 15, 2038. The 7.20% and 8.15% senior notes are subject to an interest rate adjustment if the debt ratings assigned to the notes are downgraded (or subsequently upgraded). In addition, our 7.20%, 8.15%, 3.15%, and 4.625% senior notes contain a change of control provision that may require us to purchase the notes under certain circumstances. All six series of our senior notes, which are unsecured, may be redeemed at our option at any time at 100% of the principal amount plus accrued interest and a specified make-whole amount. Our senior notes are more fully discussed in Note 11 to the consolidated financial statements included in Item 8. – Financial Statements and Supplementary Data.

## Credit Agreement

Our 5-year $1.0 billion unsecured revolving agreement expires in November 2016. Under the credit agreement, at our option, we can borrow on either a competitive advance basis or a revolving credit basis. The revolving credit portion bears interest at either LIBOR plus a spread or the base rate plus a spread. The LIBOR spread, currently 120 basis points, varies depending on our credit ratings ranging from 87.5 to 147.5 basis points. We also pay an annual facility fee regardless of utilization. This facility fee, currently 17.5 basis points, may fluctuate between 12.5 and 27.5 basis points, depending upon our credit ratings. The competitive advance portion of any borrowings will bear interest at market rates prevailing at the time of borrowing on either a fixed rate or a floating rate based on LIBOR, at our option.



The terms of the credit agreement include standard provisions related to conditions of borrowing, including a customary material adverse effect clause which could limit our ability to borrow additional funds. In addition, the credit agreement contains customary restrictive and financial covenants as well as customary events of default, including financial covenants regarding the maintenance of a minimum level of net worth of $6.6 billion at December 31, 2012 and a maximum leverage ratio of 3.0:1. We are in compliance with the financial covenants, with actual net worth of $8.8 billion and actual leverage ratio of 1.1:1, as measured in accordance with the credit agreement as of December 31, 2012. In addition, the credit agreement includes an uncommitted $250 million incremental loan facility.

At December 31, 2012, we had no borrowings outstanding under the credit agreement. We have outstanding letters of credit of $5 million secured under the credit agreement. No amounts have been drawn on these letters of credit. Accordingly, as of December 31, 2012, we had $995 million of remaining borrowing capacity under the credit agreement, none of which would be restricted by our financial covenant compliance requirement. We have other customary, arms-length relationships, including financial advisory and banking, with some parties to the credit agreement.

## Other Long-Term Borrowings

In March 2012, we called, without penalty, junior subordinated debt of $36 million. Prior to repayment, the junior subordinated debt bore a fixed annual interest rate of 8.02% payable quarterly until 2012, and then payable at a floating rate based on LIBOR plus 310 basis points.

## Liquidity Requirements

We believe our cash balances, investment securities, operating cash flows, and funds available under our credit agreement or from other public or private financing sources, taken together, provide adequate resources to fund ongoing operating and regulatory requirements, acquisitions, future expansion opportunities, and capital expenditures for at least the next twelve months, as well as to refinance or repay debt, and repurchase shares.

Adverse changes in our credit rating may increase the rate of interest we pay and may impact the amount of credit available to us in the future. Our investment-grade credit rating at December 31, 2012 was BBB according to Standard & Poor's Rating Services, or S&P, and Baa3 according to Moody's Investors Services, Inc., or Moody's. A downgrade by S&P to BB+ or by Moody's to Ba1 triggers an interest rate increase of 25 basis points with respect to $750 million of our senior notes. Successive one notch downgrades increase the interest rate an additional 25 basis points, or annual interest expense by $2 million, up to a maximum 100 basis points, or annual interest expense by $8 million.

In addition, we operate as a holding company in a highly regulated industry. Humana Inc., our parent company, is dependent upon dividends and administrative expense reimbursements from our subsidiaries, most of which are subject to regulatory restrictions. We continue to maintain significant levels of aggregate excess statutory capital and surplus in our state-regulated operating subsidiaries. Cash, cash equivalents, and short-term investments at the parent company were $346 million at December 31, 2012 and $494 million at December 31, 2011. Our subsidiaries paid dividends to the parent of $1.2 billion in 2012, $1.1 billion in 2011, and $747 million in 2010. Refer to our parent company financial statements and accompanying notes in Schedule I – Parent Company Financial Information. As described in Item 7. – Management’s Discussion and Analysis of Financial Condition and Results of Operations under the section titled “Health Insurance Reform,” the NAIC is continuing discussions regarding the accounting for the insurance industry premium-based assessment required by the Health Insurance Reform Legislation and may require accrual and associated subsidiary funding consideration for the first two years of the assessment in 2014 followed by annual accruals thereafter. The NAIC guidance is contradictory to final GAAP guidance issued by the FASB in July 2011, which requires annual accrual of the insurance industry premium-based assessment in the year in which it is payable.



## Regulatory Requirements

Certain of our subsidiaries operate in states that regulate the payment of dividends, loans, or other cash transfers to Humana Inc., our parent company, and require minimum levels of equity as well as limit investments to approved securities. The amount of dividends that may be paid to Humana Inc. by these subsidiaries, without prior approval by state regulatory authorities, or ordinary dividends, is limited based on the entity’s level of statutory income and statutory capital and surplus. In most states, prior notification is provided before paying a dividend even if approval is not required. Actual dividends paid may vary due to consideration of excess statutory capital and surplus and expected future surplus requirements related to, for example, premium volume and product mix.

Although minimum required levels of equity are largely based on premium volume, product mix, and the quality of assets held, minimum requirements vary significantly at the state level. Our state regulated subsidiaries had aggregate statutory capital and surplus of approximately $5.1 billion and $4.7 billion as of December 31, 2012 and 2011, respectively, which exceeded aggregate minimum regulatory requirements. Excluding Puerto Rico subsidiaries, the amount of ordinary dividends that may be paid to our parent company in 2013 is approximately $911 million in the aggregate. This compares to ordinary dividends that were able to be paid in 2012 of approximately $860 million. We expect the amount of dividends to be paid to our parent company in 2013 to approximate the amount of ordinary dividends.

## Contractual Obligations

We are contractually obligated to make payments for years subsequent to December 31, 2012 as follows:

<table><tr><td rowspan="3"></td><td colspan="6">Payments Due by Period</td></tr><tr><td rowspan="2">Total</td><td rowspan="2">Less than 1 Year</td><td rowspan="2">1-3 Years (in millions)</td><td rowspan="2">3-5 Years</td><td rowspan="2">More than 5 Years</td><td></td></tr><tr><td></td></tr><tr><td>Debt</td><td>$2,550</td><td>$ 0</td><td>$ 0</td><td>$ 500</td><td>$2,050</td><td></td></tr><tr><td>Interest (1)</td><td>1,694</td><td>146</td><td>293</td><td>243</td><td>1,012</td><td></td></tr><tr><td>Operating leases (2)</td><td>852</td><td>212</td><td>326</td><td>192</td><td>122</td><td></td></tr><tr><td>Purchase obligations (3)</td><td>262</td><td>124</td><td>109</td><td>13</td><td>16</td><td></td></tr><tr><td>Future policy benefits payable and other</td><td>2,209</td><td>65</td><td>269</td><td>238</td><td>1,637</td><td></td></tr><tr><td>long-term liabilities (4)</td><td>$7,567</td><td>$547</td><td>$997</td><td>$1,186</td><td>$4,837</td><td></td></tr><tr><td>Total</td><td></td><td></td><td></td><td></td><td></td><td></td></tr></table>

(1) Interest includes the estimated contractual interest payments under our debt agreements.

(2) We lease facilities, computer hardware, and other furniture and equipment under long-term operating leases that are noncancelable and expire on various dates through 2025. We sublease facilities or partial facilities to third party tenants for space not used in our operations which partially mitigates our operating lease commitments. An operating lease is a type of off-balance sheet arrangement. Assuming we acquired the asset, rather than leased such asset, we would have recognized a liability for the financing of these assets. See also Note 15 to the consolidated financial statements included in Item 8. – Financial Statements and Supplementary Data.

(3) Purchase obligations include agreements to purchase services, primarily information technology related services, or to make improvements to real estate, in each case that are enforceable and legally binding on us and that specify all significant terms, including: fixed or minimum levels of service to be purchased; fixed, minimum or variable price provisions; and the appropriate timing of the transaction. Purchase obligations exclude agreements that are cancelable without penalty.

(4) Includes future policy benefits payable ceded to third parties through 100% coinsurance agreements as more fully described in Note 18 to the consolidated financial statements included in Item 8. – Financial Statements and Supplementary Data. We expect the assuming reinsurance carriers to fund these obligations



and reflected these amounts as reinsurance recoverables included in other long-term assets on our consolidated balance sheet. Amounts payable in less than one year are included in trade accounts payable and accrued expenses in the consolidated balance sheet.

## Off-Balance Sheet Arrangements

As part of our ongoing business, we do not participate or knowingly seek to participate in transactions that generate relationships with unconsolidated entities or financial partnerships, such as entities often referred to as structured finance or special purpose entities, or SPEs, which would have been established for the purpose of facilitating off-balance sheet arrangements or other contractually narrow or limited purposes. As of December 31, 2012, we were not involved in any SPE transactions.

## Guarantees and Indemnifications

Through indemnity agreements approved by the state regulatory authorities, certain of our regulated subsidiaries generally are guaranteed by Humana Inc., our parent company, in the event of insolvency for (1) member coverage for which premium payment has been made prior to insolvency; (2) benefits for members then hospitalized until discharged; and (3) payment to providers for services rendered prior to insolvency. Our parent also has guaranteed the obligations of our military services subsidiaries.

In the ordinary course of business, we enter into contractual arrangements under which we may agree to indemnify a third party to such arrangement from any losses incurred relating to the services they perform on behalf of us, or for losses arising from certain events as defined within the particular contract, which may include, for example, litigation or claims relating to past performance. Such indemnification obligations may not be subject to maximum loss clauses. Historically, payments made related to these indemnifications have been immaterial.

## Government Contracts

Our Medicare products, which accounted for approximately 72% of our total premiums and services revenue for the year ended December 31, 2012, primarily consisted of products covered under the Medicare Advantage and Medicare Part D Prescription Drug Plan contracts with the federal government. These contracts are renewed generally for a calendar year term unless CMS notifies us of its decision not to renew by August 1 of the calendar year in which the contract would end, or we notify CMS of our decision not to renew by the first Monday in June of the calendar year in which the contract would end. All material contracts between Humana and CMS relating to our Medicare products have been renewed for 2013, and all of our product offerings filed with CMS for 2013 have been approved.

CMS uses a risk-adjustment model which apportions premiums paid to Medicare Advantage plans according to health severity. The risk-adjustment model pays more for enrollees with predictably higher costs. Under this model, rates paid to Medicare Advantage plans are based on actuarially determined bids, which include a process whereby our prospective payments are based on a comparison of our beneficiaries' risk scores, derived from medical diagnoses, to those enrolled in the government's original Medicare program. Under the risk-adjustment methodology, all Medicare Advantage plans must collect and submit the necessary diagnosis code information from hospital inpatient, hospital outpatient, and physician providers to CMS within prescribed deadlines. The CMS risk-adjustment model uses the diagnosis data to calculate the risk-adjusted premium payment to Medicare Advantage plans, which CMS adjusts for coding pattern differences between the health plans and the government fee-for-service program. We generally rely on providers, including certain providers in our network who are our employees, to code their claim submissions with appropriate diagnoses, which we send to CMS as the basis for our payment received from CMS under the actuarial risk-adjustment model. We also rely on these providers to document appropriately all medical data, including the diagnosis data submitted with claims.



CMS is continuing to perform audits of various companies’ selected Medicare Advantage contracts related to this risk adjustment diagnosis data. We refer to these audits as Risk-Adjustment Data Validation Audits, or RADV audits. RADV audits review medical records in an attempt to validate provider medical record documentation and coding practices which influence the calculation of premium payments to Medicare Advantage plans.

On February 24, 2012, CMS released a “Notice of Final Payment Error Calculation Methodology for Part C Medicare Advantage Risk Adjustment Data Validation (RADV) Contract-Level Audits.” The payment error calculation methodology provides that, in calculating the economic impact of audit results for a Medicare Advantage contract, if any, the results of the audit sample will be extrapolated to the entire Medicare Advantage contract based upon a comparison to “benchmark” audit data in the government fee-for-service program. This comparison to the government program benchmark audit is necessary to determine the economic impact, if any, of audit results because the government program data set, including any attendant errors that are present in that data set, provides the basis for Medicare Advantage plans risk adjustment to payment rates. CMS already makes other adjustments to payment rates based on a comparison of coding pattern differences between Medicare Advantage plans and the government fee-for-service program data (such as for frequency of coding for certain diagnoses in Medicare Advantage plan data versus the government program data set).

The final methodology, including the first application of extrapolated audit results to determine audit settlements, is expected to be applied to the next round of RADV contract level audits to be conducted on 2011 premium payments. Selected Medicare Advantage contracts will be notified of an audit at some point after the close of the final reconciliation for the payment year being audited. The final reconciliation occurs in August of the calendar year following the payment year.

Estimated audit settlements are recorded as a reduction of premiums revenue in our consolidated statements of income, based upon available information. During 2012, we completed internal contract level audits of certain contracts based on the RADV audit methodology prescribed by CMS. Included in these internal contract level audits was an audit of our Private Fee-For-Service business which we used to represent a proxy of the benchmark audit data in the government fee-for-service program which has not yet been released. We based our accrual of estimated audit settlements for contract years 2011 (the first year that application of extrapolated audit results is applicable) and 2012 on the results of these internal contract level audits. Estimates derived from these results were not material to our results of operations, financial position, or cash flows. However, as indicated, we are awaiting additional guidance from CMS regarding the benchmark audit data in the government fee-for-service program and the identification of our specific Medicare Advantage contracts that will be selected for audit. Accordingly, we cannot determine whether such audits will have a material adverse effect on our results of operations, financial position, or cash flows.

At December 31, 2012, our military services business, which accounted for approximately 3% of our total premiums and services revenue for the year ended December 31, 2012, primarily consisted of the TRICARE South Region contract. On April 1, 2012, we began delivering services under the new TRICARE South Region contract that the TMA awarded to us on February 25, 2011. The new 5-year South Region contract, which expires March 31, 2017, is subject to annual renewals on April 1 of each year during its term at the government's option. The TMA has notified us of its intent to exercise its option to extend the TRICARE South Region contract through March 31, 2014.

Our Medicaid business, which accounted for approximately 3% of our total premiums and services revenue for the year ended December 31, 2012, primarily consists of contracts in Puerto Rico and Florida, with the vast majority in Puerto Rico. Effective October 1, 2010, as amended in May 2011, the Puerto Rico Health Insurance Administration, or PRHIA, awarded us contracts for the East, Southeast, and Southwest regions for a three-year term through June 30, 2013.

The loss of any of the contracts above or significant changes in these programs as a result of legislative action, including reductions in premium payments to us, or increases in member benefits without corresponding



increases in premium payments to us, may have a material adverse effect on our results of operations, financial position, and cash flows.

## Critical Accounting Policies and Estimates

The discussion and analysis of our financial condition and results of operations is based upon our consolidated financial statements and accompanying notes, which have been prepared in accordance with accounting principles generally accepted in the United States of America. The preparation of these financial statements and accompanying notes requires us to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. We continuously evaluate our estimates and those critical accounting policies related primarily to benefits expense and revenue recognition as well as accounting for impairments related to our investment securities, goodwill, and long-lived assets. These estimates are based on knowledge of current events and anticipated future events and, accordingly, actual results ultimately may differ from those estimates. We believe the following critical accounting policies involve the most significant judgments and estimates used in the preparation of our consolidated financial statements.

## Benefits Expense Recognition

Benefits expense is recognized in the period in which services are provided and includes an estimate of the cost of services which have been incurred but not yet reported, or IBNR. IBNR represents a substantial portion of our benefits payable as follows:

<table><tr><td rowspan="2"></td><td rowspan="2">December 31, 2012</td><td rowspan="2">Percentage of Total</td><td rowspan="2">December 31, 2011</td><td rowspan="2">Percentage of Total</td></tr><tr></tr><tr><td></td><td colspan="4">(dollars in millions)</td></tr><tr><td>IBNR</td><td>$2,552</td><td>67.5%</td><td>$2,056</td><td>54.8%</td></tr><tr><td>Reported claims in process</td><td>315</td><td>8.3%</td><td>376</td><td>10.0%</td></tr><tr><td>Other benefits payable</td><td>908</td><td>24.1%</td><td>983</td><td>26.2%</td></tr><tr><td>Benefits payable, excluding military services</td><td>3,775</td><td>99.9%</td><td>3,415</td><td>91.0%</td></tr><tr><td>Military services benefits payable</td><td>4</td><td>0.1%</td><td>339</td><td>9.0%</td></tr><tr><td>Total benefits payable</td><td>$3,779</td><td>100.0%</td><td>$3,754</td><td>100.0%</td></tr></table>

Military services benefits payable primarily relates to our previous TRICARE South Region contract that expired on March 31, 2012 and primarily consists of our estimate of incurred healthcare services provided to beneficiaries which were in turn reimbursed by the federal government as further described in Note 2 to the consolidated financial statements included in Item 8. – Financial Statements and Supplementary Data. This amount was generally offset by a corresponding receivable due from the federal government, as more fully-described in Item 7. – Management’s Discussion and Analysis of Financial Condition and Results of Operations under the section titled “Cash Flow from Operating Activities.” Under the new TRICARE South Region contract effective April 1, 2012, the federal government retains the risk of the cost of health benefits and related benefit obligation as further described in Note 2 to the consolidated financial statements included in Item 8. – Financial Statements and Supplementary Data.

Our reserving practice is to consistently recognize the actuarial best point estimate within a level of confidence required by actuarial standards. Actuarial standards of practice generally require a level of confidence such that the liabilities established for IBNR have a greater probability of being adequate versus being insufficient, or such that the liabilities established for IBNR are sufficient to cover obligations under an assumption of moderately adverse conditions. Adverse conditions are situations in which the actual claims are expected to be higher than the otherwise estimated value of such claims at the time of the estimate. Therefore, in many situations, the claim amounts ultimately settled will be less than the estimate that satisfies the actuarial standards of practice.



We develop our estimate for IBNR using actuarial methodologies and assumptions, primarily based upon historical claim experience. Depending on the period for which incurred claims are estimated, we apply a different method in determining our estimate. For periods prior to the most recent three months, the key assumption used in estimating our IBNR is that the completion factor pattern remains consistent over a rolling 12-month period after adjusting for known changes in claim inventory levels and known changes in claim payment processes. Completion factors result from the calculation of the percentage of claims incurred during a given period that have historically been adjudicated as of the reporting period. For the most recent three months, the incurred claims are estimated primarily from a trend analysis based upon per member per month claims trends developed from our historical experience in the preceding months, adjusted for known changes in estimates of recent hospital and drug utilization data, provider contracting changes, changes in benefit levels, changes in member cost sharing, changes in medical management processes, product mix, and weekday seasonality.

The completion factor method is used for the months of incurred claims prior to the most recent three months because the historical percentage of claims processed for those months is at a level sufficient to produce a consistently reliable result. Conversely, for the most recent three months of incurred claims, the volume of claims processed historically is not at a level sufficient to produce a reliable result, which therefore requires us to examine historical trend patterns as the primary method of evaluation. Changes in claim processes, including recoveries of overpayments, receipt cycle times, claim inventory levels, outsourcing, system conversions, and processing disruptions due to weather or other events affect views regarding the reasonable choice of completion factors. Claim payments to providers for services rendered are often net of overpayment recoveries for claims paid previously, as contractually allowed. Claim overpayment recoveries can result from many different factors, including retroactive enrollment activity, audits of provider billings and/or payment errors. Changes in patterns of claim overpayment recoveries can be unpredictable and result in completion factor volatility, as they often impact older dates of service. The receipt cycle time measures the average length of time between when a medical claim was initially incurred and when the claim form was received. Increased electronic claim submissions from providers have decreased the receipt cycle time over the last several years. If claims are submitted or processed on a faster (slower) pace than prior periods, the actual claim may be more (less) complete than originally estimated using our completion factors, which may result in reserves that are higher (lower) than required.

Medical cost trends potentially are more volatile than other segments of the economy. The drivers of medical cost trends include increases in the utilization of hospital facilities, physician services, new higher priced technologies and medical procedures, and new prescription drugs and therapies, as well as the inflationary effect on the cost per unit of each of these expense components. Other external factors such as government-mandated benefits or other regulatory changes, the tort liability system, increases in medical services capacity, direct to consumer advertising for prescription drugs and medical services, an aging population, lifestyle changes including diet and smoking, catastrophes, and epidemics also may impact medical cost trends. Internal factors such as system conversions, claims processing cycle times, changes in medical management practices and changes in provider contracts also may impact our ability to accurately predict estimates of historical completion factors or medical cost trends. All of these factors are considered in estimating IBNR and in estimating the per member per month claims trend for purposes of determining the reserve for the most recent three months. Additionally, we continually prepare and review follow-up studies to assess the reasonableness of the estimates generated by our process and methods over time. The results of these studies are also considered in determining the reserve for the most recent three months. Each of these factors requires significant judgment by management.



The completion and claims per member per month trend factors are the most significant factors impacting the IBNR estimate. The portion of IBNR estimated using completion factors for claims incurred prior to the most recent three months is generally less variable than the portion of IBNR estimated using trend factors. The following table illustrates the sensitivity of these factors assuming moderate adverse experience and the estimated potential impact on our operating results caused by reasonably likely changes in these factors based on December 31, 2012 data:

<table><tr><td colspan="2">Completion Factor (a):</td><td colspan="2">Claims Trend Factor (b):</td></tr><tr><td>Factor Change (c)</td><td>Decrease in Benefits Payable</td><td>Factor Change (c)</td><td>Decrease in Benefits Payable</td></tr><tr><td colspan="4">(dollars in millions)</td></tr><tr><td>1.60%</td><td>$ (309)</td><td>(4.75%)</td><td>$ (321)</td></tr><tr><td>1.20%</td><td>$ (232)</td><td>(4.25%)</td><td>$ (288)</td></tr><tr><td>0.80%</td><td>$ (155)</td><td>(3.50%)</td><td>$ (237)</td></tr><tr><td>0.60%</td><td>$ (116)</td><td>(3.00%)</td><td>$ (203)</td></tr><tr><td>0.40%</td><td>$ (77)</td><td>(2.50%)</td><td>$ (169)</td></tr><tr><td>0.20%</td><td>$ (39)</td><td>(2.00%)</td><td>$ (135)</td></tr><tr><td>0.10%</td><td>$ (19)</td><td>(1.50%)</td><td>$ (101)</td></tr></table>

(a) Reflects estimated potential changes in benefits payable at December 31, 2012 caused by changes in completion factors for incurred months prior to the most recent three months.

(b) Reflects estimated potential changes in benefits payable at December 31, 2012 caused by changes in annualized claims trend used for the estimation of per member per month incurred claims for the most recent three months.

(c) The factor change indicated represents the percentage point change.

The following table provides a historical perspective regarding the accrual and payment of our benefits payable, excluding military services. Components of the total incurred claims for each year include amounts accrued for current year estimated benefits expense as well as adjustments to prior year estimated accruals.

<table><tr><td></td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td></td><td colspan="3">(in millions)</td></tr><tr><td>Balances at January 1</td><td>$ 3,415</td><td>$ 3,214</td><td>$ 2,943</td></tr><tr><td>Acquisitions</td><td>66</td><td>29</td><td>0</td></tr><tr><td>Incurred related to:</td><td></td><td></td><td></td></tr><tr><td>Current year</td><td>30,198</td><td>25,834</td><td>24,226</td></tr><tr><td>Prior years</td><td>(257)</td><td>(372)</td><td>(434)</td></tr><tr><td>Total incurred</td><td>29,941</td><td>25,462</td><td>23,792</td></tr><tr><td>Paid related to:</td><td></td><td></td><td></td></tr><tr><td>Current year</td><td>(26,738)</td><td>(22,742)</td><td>(21,309)</td></tr><tr><td>Prior years</td><td>(2,909)</td><td>(2,548)</td><td>(2,212)</td></tr><tr><td>Total paid</td><td>(29,647)</td><td>(25,290)</td><td>(23,521)</td></tr><tr><td>Balances at December 31</td><td>$ 3,775</td><td>$ 3,415</td><td>$ 3,214</td></tr></table>



The following table summarizes the changes in estimate for incurred claims related to prior years attributable to our key assumptions. As previously described, our key assumptions consist of trend and completion factors estimated using an assumption of moderately adverse conditions. The amounts below represent the difference between our original estimates and the actual benefits expense ultimately incurred as determined from subsequent claim payments.

Favorable Development by Changes in Key Assumptions

<table><tr><td rowspan="3"></td><td colspan="2">2012</td><td colspan="2">2011</td><td colspan="2">2010</td></tr><tr><td colspan="2">Factor Change (a)</td><td colspan="2">Factor Change (a)</td><td colspan="2">Factor Change (b)</td></tr><tr><td colspan="2">Amount</td><td colspan="2">Amount</td><td colspan="2">Amount</td></tr><tr><td>Trend factors</td><td>$ (138)</td><td>(2.4)%</td><td>$ (189)</td><td>(3.8)%</td><td>$ (213)</td><td>(4.7)%</td></tr><tr><td>Completion factors</td><td>(119)</td><td>0.7%</td><td>(183)</td><td>1.2%</td><td>(221)</td><td>1.6%</td></tr><tr><td>Total</td><td>$ (257)</td><td></td><td>$ (372)</td><td></td><td>$ (434)</td><td></td></tr></table>

(a) The factor change indicated represents the percentage point change.

As previously discussed, our reserving practice is to consistently recognize the actuarial best estimate of our ultimate liability for claims. Actuarial standards require the use of assumptions based on moderately adverse experience, which generally results in favorable reserve development, or reserves that are considered redundant. There was favorable medical claims reserve development related to prior fiscal years of $257 million in 2012, $372 million in 2011, and $434 million in 2010. The table below details our favorable medical claims reserve development related to prior fiscal years by segment for 2012, 2011, and 2010.

<table><tr><td rowspan="3"></td><td colspan="5">Favorable Medical Claims Reserve Development</td><td colspan="2">Change</td></tr><tr><td rowspan="2">2012</td><td rowspan="2">2011</td><td rowspan="2">2010</td><td rowspan="2">(in millions)</td><td rowspan="2">2012</td><td rowspan="2">2011</td><td></td></tr><tr><td></td></tr><tr><td>Retail Segment</td><td>$ (192)</td><td>$ (245)</td><td>$ (343)</td><td>$ (53)</td><td>$ (98)</td><td></td><td></td></tr><tr><td>Employer Group Segment</td><td>(48)</td><td>(114)</td><td>(73)</td><td>(66)</td><td>41</td><td></td><td></td></tr><tr><td>Other Businesses</td><td>(17)</td><td>(13)</td><td>(18)</td><td>4</td><td>(5)</td><td></td><td></td></tr><tr><td>Total</td><td>$ (257)</td><td>$ (372)</td><td>$ (434)</td><td>$ (115)</td><td>$ (62)</td><td></td><td></td></tr></table>

The favorable medical claims reserve development for 2012, 2011, and 2010 primarily reflects the consistent application of trend and completion factors estimated using an assumption of moderately adverse conditions. In addition, the favorable medical claims reserve development for 2011 and 2010 reflect improvements in the claims processing environment and, to a lesser extent, better than originally estimated utilization. The improvements in the claims processing environment benefited all lines of business during 2011 and 2010, but were more significant during 2010, particularly in our Medicare Private Fee-For-Service line of business. As a result of these improvements, during 2011 and 2010 we experienced a significant increase in claim overpayment recoveries for claims incurred in prior years, primarily as a result of increased audits of provider billings, as well as system enhancements that improved the claim recovery functionality. In addition, in 2010, a shortening of the cycle time associated with provider claim submissions was a contributing factor. We believe we have consistently applied our methodology in determining our best estimate for benefits payable.

We continually adjust our historical trend and completion factor experience with our knowledge of recent events that may impact current trends and completion factors when establishing our reserves. Because our reserving practice is to consistently recognize the actuarial best point estimate using an assumption of moderately adverse conditions as required by actuarial standards, there is a reasonable possibility that variances between actual trend and completion factors and those assumed in our December 31, 2012 estimates would fall towards the middle of the ranges previously presented in our sensitivity table.



Benefits expense associated with military services and provisions associated with future policy benefits excluded from the previous table was as follows for the years ended December 31, 2012, 2011 and 2010:

<table><tr><td></td><td>2012</td><td>2011 (in millions)</td><td>2010</td></tr><tr><td>Military services</td><td>$ 908</td><td>$3,247</td><td>$3,059</td></tr><tr><td>Future policy benefits</td><td>136</td><td>114</td><td>266</td></tr><tr><td>Total</td><td>$1,044</td><td>$3,361</td><td>$3,325</td></tr></table>

The declines in military services benefits payable and benefits expense in 2012 relate to the transition to the new TRICARE South Region contract on April 1, 2012, which is accounted for as an administrative services only contract as more fully described in Note 2 to the consolidated financial statements included in Item 8. – Financial Statements and Supplementary Data. Our previous TRICARE contract that expired on March 31, 2012 contained provisions where we shared the risk with the federal government for the cost of health benefits. Therefore, the impact on our income from operations from changes in estimate for TRICARE benefits payable was reduced substantially by the federal government’s share of the risk. The net change in income from operations as determined retrospectively, after giving consideration to claim development occurring in the current period, was an increase of approximately $2 million for 2011 and a decrease of approximately $14 million for 2010.

Future policy benefits payable of $1.9 billion and $1.7 billion at December 31, 2012 and 2011, respectively, represent liabilities for long-duration insurance policies including long-term care, life insurance, annuities, and certain health and other supplemental policies sold to individuals for which some of the premium received in the earlier years is intended to pay anticipated benefits to be incurred in future years. These reserves are recognized on a net level premium method based on interest rates, mortality, morbidity, withdrawal and maintenance expense assumptions from published actuarial tables, modified based upon actual experience. The assumptions used to determine the liability for future policy benefits are established and locked in at the time each contract is acquired and would only change if our expected future experience deteriorated to the point that the level of the liability, together with the present value of future gross premiums, are not adequate to provide for future expected policy benefits.

Future policy benefits payable include $1.1 billion at December 31, 2012 and $938 million at December 31, 2011 associated with a closed block of long-term care policies acquired in connection with the November 30, 2007 KMG acquisition. These amounts include $119 million at December 31, 2012 and $47 million at December 31, 2011 associated with amounts charged to accumulated other comprehensive income for an additional liability that would exist on our closed-block of long-term care policies if unrealized gains on the sale of the investments backing such products had been realized and the proceeds reinvested at then current yields. Amounts charged to accumulated other comprehensive income are net of applicable deferred taxes.

During 2012, we recorded a change in estimate associated with future policy benefits payable for our long-term care block resulting in additional benefits expense of $29 million and a corresponding increase in future policy benefits payable. This change in estimate was based on current claim experience demonstrating an increase in the length of the time policyholders already in payment status remained in such status. Future policy benefits payable was increased to cover future payments to policyholders currently in payment status.

Long-term care policies provide for long-duration coverage and, therefore, our actual experience will emerge many years after assumptions have been established. The risk of a deviation of the actual interest rates, morbidity rates, and mortality rates from those assumed in our reserves are particularly significant to our closed block of long-term care policies. We monitor the loss experience of these long-term care policies and, when necessary, apply for premium rate increases through a regulatory filing and approval process in the jurisdictions in which such products were sold. To the extent premium rate increases and/or loss experience vary from our acquisition date assumptions, future adjustments to reserves could be required. During 2010, certain states



approved premium rate increases for a large portion of our long-term care block that were significantly below our acquisition date assumptions. Based on these actions by the states, combined with lower interest rates and higher actual expenses as compared to acquisition date assumptions, we determined that our existing future policy benefits payable, together with the present value of future gross premiums, associated with our long-term care policies were not adequate to provide for future policy benefits under these policies; therefore we unlocked and modified our assumptions based on current expectations. Accordingly, during 2010 we recorded $139 million of additional benefits expense, with a corresponding increase in future policy benefits payable of $170 million partially offset by a related reinsurance recoverable of $31 million included in other long-term assets. In addition, future policy benefits payable include amounts of $220 million at December 31, 2012 and of $224 million at December 31, 2011 which are subject to 100% coinsurance agreements as more fully described in Note 18 to the consolidated financial statements included in Item 8. – Financial Statements and Supplementary Data, and as such are offset by a related reinsurance recoverable included in other long-term assets.

## Revenue Recognition

We generally establish one-year commercial membership contracts with employer groups, subject to cancellation by the employer group on 30-day written notice. Our Medicare contracts with CMS renew annually. Our military services contracts with the federal government and our contracts with various state Medicaid programs generally are multi-year contracts subject to annual renewal provisions.

Our commercial contracts establish rates on a per employee basis for each month of coverage based on the type of coverage purchased (single to family coverage options). Our Medicare and Medicaid contracts also establish monthly rates per member. However, our Medicare contracts also have additional provisions as outlined in the following separate section.

Premiums revenue and administrative services only, or ASO, fees are estimated by multiplying the membership covered under the various contracts by the contractual rates. In addition, we adjust revenues for estimated changes in an employer’s enrollment and individuals that ultimately may fail to pay, and beginning January 1, 2011, for estimated rebates to policyholders under the minimum benefit ratios required under the Health Insurance Reform Legislation. We estimate these policyholder rebates by projecting calendar year minimum benefit ratios for the individual, small group, and large group markets, as defined by the Health Insurance Reform Legislation using a methodology prescribed by the Department of Health and Human Services, separately by state and legal entity. Estimated calendar year rebates recognized ratably during the year are revised each period to reflect current experience. Enrollment changes not yet processed or not yet reported by an employer group or the government, also known as retroactive membership adjustments, are estimated based on available data and historical trends. We routinely monitor the collectibility of specific accounts, the aging of receivables, historical retroactivity trends, estimated rebates, as well as prevailing and anticipated economic conditions, and reflect any required adjustments in the current period’s revenue.

We bill and collect premium remittances from employer groups and members in our Medicare and other individual products monthly. We receive monthly premiums from the federal government and various states according to government specified payment rates and various contractual terms. Changes in revenues from CMS for our Medicare products resulting from the periodic changes in risk-adjustment scores derived from medical diagnoses for our membership are recognized when the amounts become determinable and the collectibility is reasonably assured.

## Medicare Part D Provisions

We cover prescription drug benefits in accordance with Medicare Part D under multiple contracts with CMS. The payments we receive monthly from CMS and members, which are determined from our annual bid, represent amounts for providing prescription drug insurance coverage. We recognize premiums revenue for providing this insurance coverage ratably over the term of our annual contract. Our CMS payment is subject to



risk sharing through the Medicare Part D risk corridor provisions. In addition, receipts for reinsurance and low-income cost subsidies as well as receipts for certain discounts on brand name prescription drugs in the coverage gap represent payments for prescription drug costs for which we are not at risk.

The risk corridor provisions compare costs targeted in our bids to actual prescription drug costs, limited to actual costs that would have been incurred under the standard coverage as defined by CMS. Variances exceeding certain thresholds may result in CMS making additional payments to us or require us to refund to CMS a portion of the premiums we received. We estimate and recognize an adjustment to premiums revenue related to these risk corridor provisions based upon pharmacy claims experience to date as if the annual contract were to terminate at the end of the reporting period. Accordingly, this estimate provides no consideration to future pharmacy claims experience. We record a receivable or payable at the contract level and classify the amount as current or long-term in the consolidated balance sheets based on the timing of expected settlement.

The estimate of the settlement associated with risk corridor provisions requires us to consider factors that may not be certain at period end, including member eligibility and risk adjustment score differences with CMS as well as pharmacy rebates from manufacturers. These factors have an offsetting effect on changes in the risk corridor estimate. In 2012, we paid $131 million and in January 2013 we paid $158 million related to our reconciliation with CMS regarding the 2011 Medicare Part D risk corridor provisions compared to our estimate of $286 million at December 31, 2011. In 2011, we paid $380 million related to our reconciliation with CMS regarding the 2010 Medicare Part D risk corridor provisions compared to our estimate of $345 million at December 31, 2010. The net liability associated with the 2012 risk corridor estimate, which will be settled in 2013, was $194 million at December 31, 2012.

Reinsurance and low-income cost subsidies represent funding from CMS in connection with the Medicare Part D program for which we assume no risk. Reinsurance subsidies represent funding from CMS for its portion of prescription drug costs which exceed the member’s out-of-pocket threshold, or the catastrophic coverage level. Low-income cost subsidies represent funding from CMS for all or a portion of the deductible, the coinsurance and co-payment amounts above the out-of-pocket threshold for low-income beneficiaries. Monthly prospective payments from CMS for reinsurance and low-income cost subsidies are based on assumptions submitted with our annual bid. A reconciliation and related settlement of CMS’s prospective subsidies against actual prescription drug costs we paid is made after the end of the year. Beginning in 2011, the Health Reform Legislation mandates consumer discounts of 50% on brand name prescription drugs for Part D plan participants in the coverage gap. These discounts are funded by CMS and pharmaceutical manufacturers while we administer the application of these funds. We account for these subsidies and discounts as a deposit in our consolidated balance sheets and as a financing activity in our consolidated statements of cash flows. We do not recognize premiums revenue or benefits expense for these subsidies or discounts. Receipt and payment activity is accumulated at the contract level and recorded in our consolidated balance sheets in other current assets or trade accounts payable and accrued expenses depending on the contract balance at the end of the reporting period. Gross financing receipts were $3.5 billion and gross financing withdrawals were $3.8 billion during 2012. CMS subsidy and brand name prescription drug discount activity recorded to the consolidated balance sheets at December 31, 2012 was $635 million to other current assets and $77 million to trade accounts payable and accrued expenses.

Settlement of the reinsurance and low-income cost subsidies as well as the brand name prescription drug discounts and risk corridor payment is based on a reconciliation made approximately 9 months after the close of each calendar year. We continue to revise our estimates with respect to the risk corridor provisions based on subsequent period pharmacy claims data.

## Medicare Risk-Adjustment Provisions

CMS utilizes a risk-adjustment model which apportions premiums paid to Medicare Advantage plans according to health severity. The risk-adjustment model pays more for enrollees with predictably higher costs. Under the risk-adjustment methodology, all Medicare Advantage plans must collect and submit the necessary



diagnosis code information from hospital inpatient, hospital outpatient, and physician providers to CMS within prescribed deadlines. The CMS risk-adjustment model uses this diagnosis data to calculate the risk-adjusted premium payment to Medicare Advantage plans. Rates paid to Medicare Advantage plans are established under an actuarial bid model, including a process that bases our payments on a comparison of our beneficiaries' risk scores, derived from medical diagnoses, to those enrolled in the government's original Medicare program. We generally rely on providers, including certain providers in our network who are our employees, to code their claim submissions with appropriate diagnoses, which we send to CMS as the basis for our payment received from CMS under the actuarial risk-adjustment model. We also rely on providers to appropriately document all medical data, including the diagnosis data submitted with claims. We estimate risk-adjustment revenues based on medical diagnoses for our membership. The risk-adjustment model is more fully described in Item 1. – Business under the section titled “Individual Medicare.”

## Military services

In 2012, revenues derived from our military services business represented approximately 3% of total premiums and services revenue. Military services premiums and services revenue primarily is derived from our TRICARE South Region contract with the Department of Defense, or DoD. On April 1, 2012, we began delivering services under a new TRICARE South Region contract with the DoD. Under the new contract, we provide administrative services, including offering access to our provider networks and clinical programs, claim processing, customer service, enrollment, and other services, while the federal government retains all of the risk of the cost of health benefits. Under the terms of the new TRICARE South Region contract, we do not record premiums revenue or benefits expense in our consolidated statements of income related to these health care costs and related reimbursements. Instead, we account for revenues under the new contract net of estimated health care costs similar to an administrative services fee only agreement. The new contract includes fixed administrative services fees and incentive fees and penalties. Administrative services fees are recognized as services are performed.

Our TRICARE members are served by both in-network and out-of-network providers in accordance with the new contract. We pay health care costs related to these services to the providers and are subsequently reimbursed by the DoD for such payments. We account for the payments associated with these health care costs and the related reimbursements under deposit accounting in our consolidated balance sheets and as a financing activity under receipts (withdrawals) from contract deposits in our consolidated statements of cash flows. For the first nine months of the new contract, April 1, 2012 to December 31, 2012, health care cost payments were $2.1 billion, exceeding reimbursements of $2.0 billion by $56 million.

Our previous TRICARE South Region contract that expired on March 31, 2012 provided a financial interest in the underlying health care cost; therefore, we reported revenues on a gross basis. We shared the risk with the federal government for the cost of health benefits incurred under our previous contract, earning more revenue or incurring additional cost based on the variance of actual health care costs from an annually negotiated target health care cost as described below. TRICARE revenues consisted generally of (1) an insurance premium for assuming underwriting risk for the cost of civilian health care services delivered to eligible beneficiaries; (2) health care services provided to beneficiaries which were in turn reimbursed by the federal government; and (3) administrative services fees related to claim processing, customer service, enrollment, and other services. We recognized the insurance premium as revenue ratably over the period coverage was provided. Health care services reimbursements were recognized as revenue in the period health services were provided. Administrative services fees were recognized as revenue in the period services were performed.

As indicated above, our previous TRICARE South Region contained provisions where we shared the risk with the federal government for the cost of health benefits. Annually, we negotiated a target health care cost amount, or target cost, with the federal government and determined an underwriting fee. Any variance from the target cost was shared. We earned more revenue or incurred additional costs based on the variance of actual health care costs versus the negotiated target cost. We received 20% for any cost underrun, subject to a ceiling



that limited the underwriting profit to 10% of the target cost. We paid 20% for any cost overrun, subject to a floor that limited the underwriting loss to negative 4% of the target cost. A final settlement occurred 12 to 18 months after the end of each contract year to which it applied. We deferred the recognition of any revenues for favorable contingent underwriting fee adjustments related to cost underruns until the amount was determinable and the collectibility was reasonably assured. We estimated and recognized unfavorable contingent underwriting fee adjustments related to cost overruns currently in operations as an increase in benefits expense.

The military services contracts contain provisions to negotiate change orders. Change orders occur when we perform services or incur costs under the directive of the federal government that were not originally specified in our contract. Under federal regulations we may be entitled to an equitable adjustment to the contract price in these situations. Change orders may be negotiated and settled at any time throughout the year. We record revenue applicable to change orders when services are performed and these amounts are determinable and the collectibility is reasonably assured.

## Patient Services

Patient services revenue associated with provider services in our Health and Well-Being Services segment primarily related to Concentra, acquired December 21, 2010. Patient services revenue includes (1) workers' compensation injury care and related services and (2) other healthcare services related to employer needs or statutory requirements. Patient services revenues are recognized in the period services are provided to the customer when the sales price is fixed or determinable, and are net of contractual allowances.

The provider reimbursement methods for workers’ compensation injury care and related services vary on a state-by-state basis. Most states have fee schedules pursuant to which all healthcare providers are uniformly reimbursed. The fee schedules are determined by each state and generally prescribe the maximum amounts that may be reimbursed for a designated procedure. In the states without fee schedules, healthcare providers are reimbursed based on usual, customary, and reasonable fees charged in the particular state in which the services are provided. We include billings for services in revenue net of allowance for estimated differences between list prices and allowable fee schedule rates or amounts allowed as usual, customary and reasonable, as applicable.

Revenue for other healthcare services is recognized on a fee-for-service basis at estimated collectible amounts at the time services are rendered. Our fees are determined in advance for each type of service performed.

## Investment Securities

Investment securities totaled $9.8 billion, or 49% of total assets at December 31, 2012, and $9.5 billion, or 53% of total assets at December 31, 2011. Debt securities, detailed below, comprised this entire investment portfolio at December 31, 2012 and at December 31, 2011. The fair value of debt securities were as follows at December 31, 2012 and 2011:

<table><tr><td></td><td>December 31, 2012</td><td>Percentage of Total</td><td>December 31, 2011</td><td>Percentage of Total</td></tr><tr><td>U.S. Treasury and other U.S. government corporations and agencies:</td><td></td><td></td><td></td><td></td></tr><tr><td>U.S. Treasury and agency obligations</td><td>$ 618</td><td>6.3%</td><td>$ 725</td><td>7.7%</td></tr><tr><td>Mortgage-backed securities</td><td>1,603</td><td>16.3%</td><td>1,784</td><td>18.9%</td></tr><tr><td>Tax-exempt municipal securities</td><td>3,071</td><td>31.2%</td><td>2,856</td><td>30.2%</td></tr><tr><td>Mortgage-backed securities:</td><td></td><td></td><td></td><td></td></tr><tr><td>Residential</td><td>34</td><td>0.3%</td><td>44</td><td>0.4%</td></tr><tr><td>Commercial</td><td>659</td><td>6.7%</td><td>381</td><td>4.0%</td></tr><tr><td>Asset-backed securities</td><td>68</td><td>0.7%</td><td>83</td><td>0.9%</td></tr><tr><td>Corporate debt securities</td><td>3,794</td><td>38.5%</td><td>3,580</td><td>37.9%</td></tr><tr><td>Total debt securities</td><td>$9,847</td><td>100.0%</td><td>$9,453</td><td>100.0%</td></tr></table>



Approximately 94% of our debt securities were investment-grade quality, with a weighted average credit rating of AA- by S&P at December 31, 2012. Most of the debt securities that were below investment-grade were rated BB, the higher end of the below investment-grade rating scale. Our investment policy limits investments in a single issuer and requires diversification among various asset types.

Tax-exempt municipal securities included pre-refunded bonds of $311 million at December 31, 2012 and $332 million at December 31, 2011. These pre-refunded bonds were secured by an escrow fund consisting of U.S. government obligations sufficient to pay off all amounts outstanding at maturity. The ratings of these pre-refunded bonds generally assume the rating of the government obligations at the time the fund is established. Tax-exempt municipal securities that were not pre-refunded were diversified among general obligation bonds of U.S. states and local municipalities as well as special revenue bonds. General obligation bonds, which are backed by the taxing power and full faith of the issuer, accounted for $1.1 billion of these municipals in the portfolio. Special revenue bonds, issued by a municipality to finance a specific public works project such as utilities, water and sewer, transportation, or education, and supported by the revenues of that project, accounted for $1.7 billion of these municipals. Our general obligation bonds are diversified across the U.S. with no individual state exceeding 11%. In addition, certain monoline insurers guarantee the timely repayment of bond principal and interest when a bond issuer defaults and generally provide credit enhancement for bond issues related to our tax-exempt municipal securities. We have no direct exposure to these monoline insurers. We owned $627 million and $634 million at December 31, 2012 and 2011, respectively, of tax-exempt securities guaranteed by monoline insurers. The equivalent weighted average S&P credit rating of these tax-exempt securities without the guarantee from the monoline insurer was AA-.

Our direct exposure to subprime mortgage lending is limited to investment in residential mortgage-backed securities and asset-backed securities backed by home equity loans. The fair value of securities backed by Alt-A and subprime loans was $2 million at December 31, 2012 and $3 million at December 31, 2011. There are no collateralized debt obligations or structured investment vehicles in our investment portfolio.

The percentage of corporate securities associated with the financial services industry was 22.8% at December 31, 2012 and 19.3% at December 31, 2011.

Gross unrealized losses and fair values aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position were as follows at December 31, 2012:

<table><tr><td rowspan="2"></td><td colspan="2">Less than 12 months</td><td colspan="2">12 months or more</td><td colspan="2">Total</td></tr><tr><td>Fair Value</td><td>Gross Unrealized Losses</td><td>Fair Value</td><td>Gross Unrealized Losses</td><td>Fair Value</td><td>Gross Unreali</td></tr><tr><td>December 31, 2012</td><td></td><td></td><td></td><td>(in millions)</td><td></td><td></td></tr><tr><td>U.S. Treasury and other U.S. government corporations and agencies:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>U.S. Treasury and agency obligations</td><td>$ 56</td><td>$ 0</td><td>$ 2</td><td>$ 0</td><td>$ 58</td><td>$ 0</td></tr><tr><td>Mortgage-backed securities</td><td>38</td><td>0</td><td>25</td><td>(1)</td><td>63</td><td>(1)</td></tr><tr><td>Tax-exempt municipal securities</td><td>233</td><td>(3)</td><td>27</td><td>(1)</td><td>260</td><td>(4)</td></tr><tr><td>Mortgage-backed securities:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Residential</td><td>0</td><td>0</td><td>4</td><td>(1)</td><td>4</td><td>(1)</td></tr><tr><td>Commercial</td><td>94</td><td>0</td><td>0</td><td>0</td><td>94</td><td>0</td></tr><tr><td>Asset-backed securities</td><td>2</td><td>0</td><td>4</td><td>0</td><td>6</td><td>0</td></tr><tr><td>Corporate debt securities</td><td>104</td><td>(2)</td><td>4</td><td>0</td><td>108</td><td>(2)</td></tr><tr><td>Total debt securities</td><td>$527</td><td>$(5)</td><td>$66</td><td>$(3)</td><td>$593</td><td>$(8)</td></tr></table>

Under the other-than-temporary impairment model for debt securities held, we recognize an impairment loss in income in an amount equal to the full difference between the amortized cost basis and the fair value when we



have the intent to sell the debt security or it is more likely than not we will be required to sell the debt security before recovery of our amortized cost basis. However, if we do not intend to sell the debt security, we evaluate the expected cash flows to be received as compared to amortized cost and determine if a credit loss has occurred. In the event of a credit loss, only the amount of the impairment associated with the credit loss is recognized currently in income with the remainder of the loss recognized in other comprehensive income.

When we do not intend to sell a security in an unrealized loss position, potential other-than-temporary impairment is considered using a variety of factors, including the length of time and extent to which the fair value has been less than cost; adverse conditions specifically related to the industry, geographic area or financial condition of the issuer or underlying collateral of a security; payment structure of the security; changes in credit rating of the security by the rating agencies; the volatility of the fair value changes; and changes in fair value of the security after the balance sheet date. For debt securities, we take into account expectations of relevant market and economic data. For example, with respect to mortgage and asset-backed securities, such data includes underlying loan level data and structural features such as seniority and other forms of credit enhancements. A decline in fair value is considered other-than-temporary when we do not expect to recover the entire amortized cost basis of the security. We estimate the amount of the credit loss component of a debt security as the difference between the amortized cost and the present value of the expected cash flows of the security. The present value is determined using the best estimate of future cash flows discounted at the implicit interest rate at the date of purchase. The risks inherent in assessing the impairment of an investment include the risk that market factors may differ from our expectations, facts and circumstances factored into our assessment may change with the passage of time, or we may decide to subsequently sell the investment. The determination of whether a decline in the value of an investment is other than temporary requires us to exercise significant diligence and judgment. The discovery of new information and the passage of time can significantly change these judgments. The status of the general economic environment and significant changes in the national securities markets influence the determination of fair value and the assessment of investment impairment. There is a continuing risk that declines in fair value may occur and additional material realized losses from sales or other-than-temporary impairments may be recorded in future periods.

The recoverability of our non-agency residential and commercial mortgage-backed securities is supported by factors such as seniority, underlying collateral characteristics and credit enhancements. These residential and commercial mortgage-backed securities at December 31, 2012 primarily were composed of senior tranches having high credit support, with over 99% of the collateral consisting of prime loans. The weighted average credit rating of all commercial mortgage-backed securities was AA+ at December 31, 2012.

Several European countries, including Spain, Italy, Ireland, Portugal, and Greece, have been subject to credit deterioration due to weakness in their economic and fiscal situations. We have no direct exposure to sovereign issuances of these five countries.

All issuers of securities we own that were trading at an unrealized loss at December 31, 2012 remain current on all contractual payments. After taking into account these and other factors previously described, we believe these unrealized losses primarily were caused by an increase in market interest rates and tighter liquidity conditions in the current markets than when the securities were purchased. At December 31, 2012, we did not intend to sell the securities with an unrealized loss position in accumulated other comprehensive income, and it is not likely that we will be required to sell these securities before recovery of their amortized cost basis. As a result, we believe that the securities with an unrealized loss were not other-than-temporarily impaired at December 31, 2012.

There were no material other-than-temporary impairments in 2012, 2011, or 2010.

## Goodwill and Long-lived Assets

At December 31, 2012, goodwill and other long-lived assets represented 28% of total assets and 62% of total stockholders' equity, compared to 23% and 51%, respectively, at December 31, 2011.



We are required to test at least annually for impairment at a level of reporting referred to as the reporting unit, and more frequently if adverse events or changes in circumstances indicate that the asset may be impaired. A reporting unit either is our operating segments or one level below the operating segments, referred to as a component, which comprise our reportable segments. A component is considered a reporting unit if the component constitutes a business for which discrete financial information is available that is regularly reviewed by management. We are required to aggregate the components of an operating segment into one reporting unit if they have similar economic characteristics. Goodwill is assigned to the reporting unit that is expected to benefit from a specific acquisition.

We use a two-step process to review goodwill for impairment. The first step is a screen for potential impairment, and the second step measures the amount of impairment, if any. Our strategy, long-range business plan, and annual planning process support our goodwill impairment tests. These tests are performed, at a minimum, annually in the fourth quarter, and are based on an evaluation of future discounted cash flows. We rely on this discounted cash flow analysis to determine fair value. However outcomes from the discounted cash flow analysis are compared to other market approach valuation methodologies for reasonableness. We use discount rates that correspond to a market-based weighted-average cost of capital and terminal growth rates that correspond to long-term growth prospects, consistent with the long-term inflation rate. Key assumptions in our cash flow projections, including changes in membership, premium yields, medical and operating cost trends, and certain government contract extensions, are consistent with those utilized in our long-range business plan and annual planning process. If these assumptions differ from actual, including the impact of the ultimate outcome of the Health Insurance Reform Legislation, the estimates underlying our goodwill impairment tests could be adversely affected. Goodwill impairment tests completed in each of the last three years did not result in an impairment loss. The fair value of our reporting units with significant goodwill exceeded carrying amounts by a substantial margin. A 100 basis point increase in the discount rate would not have a significant impact on the amount of margin for any of our reporting units with significant goodwill.

Beginning with 2012, we are allowed to first assess qualitative factors to determine whether it is necessary to perform the two-step quantitative goodwill impairment test. We did not elect to use the qualitative approach in 2012.

Long-lived assets consist of property and equipment and other finite-lived intangible assets. These assets are depreciated or amortized over their estimated useful life, and are subject to impairment reviews. We periodically review long-lived assets whenever adverse events or changes in circumstances indicate the carrying value of the asset may not be recoverable. In assessing recoverability, we must make assumptions regarding estimated future cash flows and other factors to determine if an impairment loss may exist, and, if so, estimate fair value. We also must estimate and make assumptions regarding the useful life we assign to our long-lived assets. If these estimates or their related assumptions change in the future, we may be required to record impairment losses or change the useful life, including accelerating depreciation or amortization for these assets. There were no material impairment losses in the last three years.

## ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Our earnings and financial position are exposed to financial market risk, including those resulting from changes in interest rates.

The level of our pretax earnings is subject to market risk due to changes in interest rates and the resulting impact on investment income and interest expense. Prior to 2009, under interest rate swap agreements, we exchanged the fixed interest rate under all of our senior notes for a variable interest rate based on LIBOR using interest rate swap agreements. We terminated all of our interest rate swap agreements in 2008. We may re-enter into interest rate swap agreements in the future depending on market conditions and other factors. Amounts borrowed under the revolving credit portion of our $1.0 billion unsecured revolving credit agreement bear interest at either LIBOR plus a spread or the base rate plus a spread. There were no borrowings outstanding under our credit agreement at December 31, 2012 or December 31, 2011.



Interest rate risk also represents a market risk factor affecting our consolidated financial position due to our significant investment portfolio, consisting primarily of fixed maturity securities of investment-grade quality with a weighted average S&P credit rating of AA- at December 31, 2012. Our net unrealized position improved $203 million from a net unrealized gain position of $525 million at December 31, 2011 to a net unrealized gain position of $728 million at December 31, 2012. At December 31, 2012, we had gross unrealized losses of $8 million on our investment portfolio primarily due to an increase in market interest rates and tighter liquidity conditions in the current markets than when the securities were purchased, and as such, there were no material other-than-temporary impairments during 2012. While we believe that these impairments are temporary and we currently do not have the intent to sell such securities, given the current market conditions and the significant judgments involved, there is a continuing risk that future declines in fair value may occur and material realized losses from sales or other-than-temporary impairments may be recorded in future periods.

Duration is the time-weighted average of the present value of the bond portfolio’s cash flow. Duration is indicative of the relationship between changes in fair value and changes in interest rates, providing a general indication of the sensitivity of the fair values of our fixed maturity securities to changes in interest rates. However, actual fair values may differ significantly from estimates based on duration. The average duration of our investment portfolio, including cash and cash equivalents, was approximately 4.0 years as of December 31, 2012 and 3.9 years as of December 31, 2011. Based on the duration including cash equivalents, a 1% increase in interest rates would generally decrease the fair value of our securities by approximately $443 million.

We have also evaluated the impact on our investment income and interest expense resulting from a hypothetical change in interest rates of 100, 200, and 300 basis points over the next twelve-month period, as reflected in the following table. The evaluation was based on our investment portfolio and our outstanding indebtedness at December 31, 2012 and 2011. Our investment portfolio consists of cash, cash equivalents, and investment securities. The modeling technique used to calculate the pro forma net change in pretax earnings considered the cash flows related to fixed income investments and debt, which are subject to interest rate changes during a prospective twelve-month period. This evaluation measures parallel shifts in interest rates and may not account for certain unpredictable events that may affect interest income, including unexpected changes of cash flows into and out of the portfolio, changes in the asset allocation, including shifts between taxable and tax-exempt securities, and spread changes specific to various investment categories. In the past ten years, changes in 3 month LIBOR rates during the year have exceeded 300 basis points once, have not changed between 200 and 300 basis points, have changed between 100 and 200 basis points four times, and have changed by less than 100 basis points five times.

<table><tr><td rowspan="2"></td><td colspan="3">Increase (decrease) in pretax earnings given an interest rate decrease of X basis points</td><td colspan="3">Increase (decrease) in pretax earnings given an interest rate increase of X basis points</td></tr><tr><td>(300)</td><td>(200)</td><td>(100)</td><td>100</td><td>200</td><td>300</td></tr><tr><td>As of December 31, 2012</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Investment income (a)</td><td>$ (16)</td><td>$ (16)</td><td>$ (10)</td><td>$ 33</td><td>$ 68</td><td>$ 102</td></tr><tr><td>Interest expense (b)</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td></tr><tr><td>Pretax</td><td>$ (16)</td><td>$ (16)</td><td>$ (10)</td><td>$ 33</td><td>$ 68</td><td>$ 102</td></tr><tr><td>As of December 31, 2011</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Investment income</td><td>$ (26)</td><td>$ (21)</td><td>$ (11)</td><td>$ 35</td><td>$ 69</td><td>$ 104</td></tr><tr><td>Interest expense (b)</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td></tr><tr><td>Pretax</td><td>$ (26)</td><td>$ (21)</td><td>$ (11)</td><td>$ 35</td><td>$ 69</td><td>$ 104</td></tr></table>

(a) As of December 31, 2012, some of our investments had interest rates below 3% so the assumed hypothetical change in pretax earnings does not reflect the full 3% point reduction.

(b) The interest rate under our senior notes is fixed. There were no borrowings outstanding under the credit agreement at December 31, 2012 or December 31, 2011.



## ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

## Humana Inc.
CONSOLIDATED BALANCE SHEETS

<table><tr><td rowspan="3"></td><td colspan="2">December 31,</td></tr><tr><td>2012</td><td>2011</td></tr><tr><td colspan="2">(in millions, except share amounts)</td></tr><tr><td>ASSETS</td><td></td><td></td></tr><tr><td>Current assets:</td><td></td><td></td></tr><tr><td>Cash and cash equivalents</td><td>$ 1,306</td><td>$ 1,377</td></tr><tr><td>Investment securities</td><td>8,001</td><td>7,743</td></tr><tr><td>Receivables, less allowance for doubtful accounts of $94 in 2012 and $85 in 2011:</td><td>733</td><td>1,034</td></tr><tr><td>Other current assets</td><td>1,670</td><td>1,027</td></tr><tr><td>Total current assets</td><td>11,710</td><td>11,181</td></tr><tr><td>Property and equipment, net</td><td>1,098</td><td>912</td></tr><tr><td>Long-term investment securities</td><td>1,846</td><td>1,710</td></tr><tr><td>Goodwill</td><td>3,640</td><td>2,740</td></tr><tr><td>Other long-term assets</td><td>1,685</td><td>1,165</td></tr><tr><td>Total assets</td><td>$19,979</td><td>$17,708</td></tr><tr><td>LIABILITIES AND STOCKHOLDERS&#x27; EQUITY</td><td></td><td></td></tr><tr><td>Current liabilities:</td><td></td><td></td></tr><tr><td>Benefits payable</td><td>$ 3,779</td><td>$ 3,754</td></tr><tr><td>Trade accounts payable and accrued expenses</td><td>2,042</td><td>1,783</td></tr><tr><td>Book overdraft</td><td>324</td><td>306</td></tr><tr><td>Unearned revenues</td><td>230</td><td>213</td></tr><tr><td>Total current liabilities</td><td>6,375</td><td>6,056</td></tr><tr><td>Long-term debt</td><td>2,611</td><td>1,659</td></tr><tr><td>Future policy benefits payable</td><td>1,858</td><td>1,663</td></tr><tr><td>Other long-term liabilities</td><td>288</td><td>267</td></tr><tr><td>Total liabilities</td><td>11,132</td><td>9,645</td></tr><tr><td>Commitments and contingencies (Note 15)</td><td></td><td></td></tr><tr><td>Stockholders&#x27; equity:</td><td></td><td></td></tr><tr><td>Preferred stock, $1 par; 10,000,000 shares authorized; none issued</td><td>0</td><td>0</td></tr><tr><td>Common stock, $0.16 2/3 par; 300,000,000 shares authorized; 194,470,820 shares issued in 2012 and 193,230,310 shares issued in 2011</td><td>32</td><td>32</td></tr><tr><td>Capital in excess of par value</td><td>2,101</td><td>1,938</td></tr><tr><td>Retained earnings</td><td>7,881</td><td>6,825</td></tr><tr><td>Accumulated other comprehensive income</td><td>386</td><td>303</td></tr><tr><td>Treasury stock, at cost, 36,138,955 shares in 2012 and 29,225,996 shares in 2011</td><td>(1,553)</td><td>(1,035)</td></tr><tr><td>Total stockholders&#x27; equity</td><td>8,847</td><td>8,063</td></tr><tr><td>Total liabilities and stockholders&#x27; equity</td><td>$19,979</td><td>$17,708</td></tr></table>

The accompanying notes are an integral part of the consolidated financial statements.



## Humana Inc.
CONSOLIDATED STATEMENTS OF INCOME

<table><tr><td rowspan="3"></td><td colspan="3">For the year ended December 31,</td></tr><tr><td>2012</td><td>2011</td><td>2010</td></tr><tr><td colspan="3">(in millions, except per share results)</td></tr><tr><td>Revenues:</td><td></td><td></td><td></td></tr><tr><td>Premiums</td><td>$37,009</td><td>$35,106</td><td>$32,712</td></tr><tr><td>Services</td><td>1,726</td><td>1,360</td><td>555</td></tr><tr><td>Investment income</td><td>391</td><td>366</td><td>329</td></tr><tr><td>Total revenues</td><td>39,126</td><td>36,832</td><td>33,596</td></tr><tr><td>Operating expenses:</td><td></td><td></td><td></td></tr><tr><td>Benefits</td><td>30,985</td><td>28,823</td><td>27,117</td></tr><tr><td>Operating costs</td><td>5,830</td><td>5,395</td><td>4,380</td></tr><tr><td>Depreciation and amortization</td><td>295</td><td>270</td><td>245</td></tr><tr><td>Total operating expenses</td><td>37,110</td><td>34,488</td><td>31,742</td></tr><tr><td>Income from operations</td><td>2,016</td><td>2,344</td><td>1,854</td></tr><tr><td>Interest expense</td><td>105</td><td>109</td><td>105</td></tr><tr><td>Income before income taxes</td><td>1,911</td><td>2,235</td><td>1,749</td></tr><tr><td>Provision for income taxes</td><td>689</td><td>816</td><td>650</td></tr><tr><td>Net income</td><td>$ 1,222</td><td>$ 1,419</td><td>$ 1,099</td></tr><tr><td>Basic earnings per common share</td><td>$ 7.56</td><td>$ 8.58</td><td>$ 6.55</td></tr><tr><td>Diluted earnings per common share</td><td>$ 7.47</td><td>$ 8.46</td><td>$ 6.47</td></tr><tr><td>Dividends declared per common share</td><td>$ 1.03</td><td>$ 0.75</td><td>$ 0.00</td></tr></table>



## Humana Inc.

## CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

<table><tr><td rowspan="2"></td><td colspan="3">For the year ended December 31,</td></tr><tr><td>2012</td><td>2011</td><td>2010</td></tr><tr><td></td><td colspan="3">(in millions)</td></tr><tr><td>Net income</td><td>$1,222</td><td>$1,419</td><td>$1,099</td></tr><tr><td>Other comprehensive income:</td><td></td><td></td><td></td></tr><tr><td>Gross unrealized investment gain</td><td>164</td><td>299</td><td>129</td></tr><tr><td>Effect of income taxes</td><td>(60)</td><td>(109)</td><td>(47)</td></tr><tr><td>Total unrealized investment gain, net of tax</td><td>104</td><td>190</td><td>82</td></tr><tr><td>Reclassification adjustment for net realized gains included in net income</td><td>(33)</td><td>(11)</td><td>(6)</td></tr><tr><td>Effect of income taxes</td><td>12</td><td>4</td><td>2</td></tr><tr><td>Total reclassification adjustment, net of tax</td><td>(21)</td><td>(7)</td><td>(4)</td></tr><tr><td>Other comprehensive income, net of tax</td><td>83</td><td>183</td><td>78</td></tr><tr><td>Comprehensive income</td><td>$1,305</td><td>$1,602</td><td>$1,177</td></tr></table>



## Humana Inc.

## CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY

<table><tr><td rowspan="2"></td><td colspan="2">Common Stock</td><td rowspan="2">Capital In Excess of Par Value</td><td rowspan="2">Retained Earnings</td><td rowspan="2">Accumulated Other Comprehensive Income (Loss)</td><td rowspan="2">Treasury Stock</td><td rowspan="2">Total Stockholders&#x27; Equity</td></tr><tr><td>Issued Shares</td><td>Amount</td></tr><tr><td>Balances, January 1, 2010</td><td>189,801</td><td>$32</td><td>$1,658</td><td>$4,430</td><td>$ 42</td><td>$ (386)</td><td>$5,776</td></tr><tr><td>Net income</td><td></td><td></td><td></td><td>1,099</td><td></td><td></td><td>1,099</td></tr><tr><td>Other comprehensive income</td><td></td><td></td><td></td><td></td><td>78</td><td></td><td>78</td></tr><tr><td>Common stock repurchases</td><td></td><td></td><td></td><td></td><td></td><td>(108)</td><td>(108)</td></tr><tr><td>Stock-based compensation</td><td></td><td></td><td>63</td><td></td><td></td><td></td><td>63</td></tr><tr><td>Restricted stock grants and restricted stock unit vesting</td><td>5</td><td>0</td><td></td><td></td><td></td><td></td><td>0</td></tr><tr><td>Restricted stock forfeitures</td><td>(127)</td><td>0</td><td>0</td><td></td><td></td><td></td><td>0</td></tr><tr><td>Stock option exercises</td><td>566</td><td>0</td><td>17</td><td></td><td></td><td></td><td>17</td></tr><tr><td>Stock option and restricted stock tax benefit</td><td></td><td></td><td>(1)</td><td></td><td></td><td></td><td>(1)</td></tr><tr><td>Balances, December 31, 2010</td><td>190,245</td><td>32</td><td>1,737</td><td>5,529</td><td>120</td><td>(494)</td><td>6,924</td></tr><tr><td>Net income</td><td></td><td></td><td></td><td>1,419</td><td></td><td></td><td>1,419</td></tr><tr><td>Other comprehensive income</td><td></td><td></td><td></td><td></td><td>183</td><td></td><td>183</td></tr><tr><td>Common stock repurchases</td><td></td><td></td><td></td><td></td><td></td><td>(541)</td><td>(541)</td></tr><tr><td>Dividends declared</td><td></td><td></td><td>0</td><td>(123)</td><td></td><td></td><td>(123)</td></tr><tr><td>Stock-based compensation</td><td></td><td></td><td>67</td><td></td><td></td><td></td><td>67</td></tr><tr><td>Restricted stock grants and restricted stock unit vesting</td><td>11</td><td>0</td><td></td><td></td><td></td><td></td><td>0</td></tr><tr><td>Restricted stock forfeitures</td><td>(105)</td><td>0</td><td>0</td><td></td><td></td><td></td><td>0</td></tr><tr><td>Stock option exercises</td><td>3,079</td><td>0</td><td>134</td><td></td><td></td><td></td><td>134</td></tr><tr><td>Stock option and restricted stock tax benefit</td><td></td><td></td><td>0</td><td></td><td></td><td></td><td>0</td></tr><tr><td>Balances, December 31, 2011</td><td>193,230</td><td>32</td><td>1,938</td><td>6,825</td><td>303</td><td>(1,035)</td><td>8,063</td></tr><tr><td>Net income</td><td></td><td></td><td></td><td>1,222</td><td></td><td></td><td>1,222</td></tr><tr><td>Other comprehensive income</td><td></td><td></td><td></td><td></td><td>83</td><td></td><td>83</td></tr><tr><td>Common stock repurchases</td><td></td><td></td><td></td><td></td><td></td><td>(518)</td><td>(518)</td></tr><tr><td>Dividends declared</td><td></td><td></td><td>0</td><td>(166)</td><td></td><td></td><td>(166)</td></tr><tr><td>Stock-based compensation</td><td></td><td></td><td>82</td><td></td><td></td><td></td><td>82</td></tr><tr><td>Restricted stock grants and restricted stock unit vesting</td><td>15</td><td>0</td><td></td><td></td><td></td><td></td><td>0</td></tr><tr><td>Restricted stock forfeitures</td><td>(1)</td><td>0</td><td>0</td><td></td><td></td><td></td><td>0</td></tr><tr><td>Stock option exercises</td><td>1,227</td><td>0</td><td>60</td><td></td><td></td><td></td><td>60</td></tr><tr><td>Stock option and restricted stock tax benefit</td><td></td><td></td><td>21</td><td></td><td></td><td></td><td>21</td></tr><tr><td>Balances, December 31, 2012</td><td>194,471</td><td>$32</td><td>$2,101</td><td>$7,881</td><td>$386</td><td>$1,553)</td><td>$8,847</td></tr></table>



## Humana Inc.

## CONSOLIDATED STATEMENTS OF CASH FLOWS

<table><tr><td rowspan="3"></td><td colspan="3">For the year ended December 31,</td></tr><tr><td>2012</td><td>2011</td><td>2010</td></tr><tr><td colspan="3">(in millions)</td></tr><tr><td>Cash flows from operating activities</td><td></td><td></td><td></td></tr><tr><td>Net income</td><td>$ 1,222</td><td>$ 1,419</td><td>$ 1,099</td></tr><tr><td>Adjustments to reconcile net income to net cash provided by operating activities:</td><td></td><td></td><td></td></tr><tr><td>Depreciation and amortization</td><td>338</td><td>303</td><td>263</td></tr><tr><td>Stock-based compensation</td><td>82</td><td>67</td><td>63</td></tr><tr><td>Net realized capital gains</td><td>(33)</td><td>(11)</td><td>(6)</td></tr><tr><td>(Benefit) provision for deferred income taxes</td><td>(80)</td><td>22</td><td>(199)</td></tr><tr><td>Provision for doubtful accounts</td><td>26</td><td>31</td><td>19</td></tr><tr><td>Changes in operating assets and liabilities, net of effect of businesses acquired:</td><td></td><td></td><td></td></tr><tr><td>Receivables</td><td>326</td><td>(106)</td><td>(46)</td></tr><tr><td>Other assets</td><td>(253)</td><td>(183)</td><td>81</td></tr><tr><td>Benefits payable</td><td>(41)</td><td>256</td><td>247</td></tr><tr><td>Other liabilities</td><td>300</td><td>194</td><td>722</td></tr><tr><td>Unearned revenues</td><td>(43)</td><td>26</td><td>(46)</td></tr><tr><td>Other</td><td>79</td><td>61</td><td>45</td></tr><tr><td>Net cash provided by operating activities</td><td>1,923</td><td>2,079</td><td>2,242</td></tr><tr><td>Cash flows from investing activities</td><td></td><td></td><td></td></tr><tr><td>Acquisitions, net of cash acquired</td><td>(1,235)</td><td>(226)</td><td>(833)</td></tr><tr><td>Purchases of property and equipment</td><td>(410)</td><td>(346)</td><td>(222)</td></tr><tr><td>Proceeds from sales of property and equipment</td><td>0</td><td>10</td><td>0</td></tr><tr><td>Purchases of investment securities</td><td>(3,221)</td><td>(3,678)</td><td>(4,589)</td></tr><tr><td>Maturities of investment securities</td><td>1,497</td><td>1,623</td><td>1,821</td></tr><tr><td>Proceeds from sales of investment securities</td><td>1,404</td><td>1,259</td><td>2,012</td></tr><tr><td>Net cash used in investing activities</td><td>(1,965)</td><td>(1,358)</td><td>(1,811)</td></tr><tr><td>Cash flows from financing activities</td><td></td><td></td><td></td></tr><tr><td>Receipts (withdrawals) from contract deposits, net</td><td>(397)</td><td>(378)</td><td>(237)</td></tr><tr><td>Proceeds from issuance of senior notes, net</td><td>990</td><td>0</td><td>0</td></tr><tr><td>Repayment of long-term debt</td><td>(36)</td><td>0</td><td>0</td></tr><tr><td>Common stock repurchases</td><td>(518)</td><td>(541)</td><td>(108)</td></tr><tr><td>Dividends paid</td><td>(165)</td><td>(82)</td><td>0</td></tr><tr><td>Excess tax benefit from stock-based compensation</td><td>22</td><td>15</td><td>2</td></tr><tr><td>Change in book overdraft</td><td>18</td><td>(103)</td><td>35</td></tr><tr><td>Proceeds from stock option exercises and other, net</td><td>57</td><td>72</td><td>(63)</td></tr><tr><td>Net cash used in financing activities</td><td>(29)</td><td>(1,017)</td><td>(371)</td></tr><tr><td>(Decrease) increase in cash and cash equivalents</td><td>(71)</td><td>(296)</td><td>60</td></tr><tr><td>Cash and cash equivalents at beginning of year</td><td>1,377</td><td>1,673</td><td>1,613</td></tr><tr><td>Cash and cash equivalents at end of year</td><td>$ 1,306</td><td>$ 1,377</td><td>$ 1,673</td></tr><tr><td>Supplemental cash flow disclosures:</td><td></td><td></td><td></td></tr><tr><td>Interest payments</td><td>$ 110</td><td>$ 114</td><td>$ 112</td></tr><tr><td>Income tax payments, net</td><td>$ 745</td><td>$ 874</td><td>$ 785</td></tr><tr><td>Details of businesses acquired in purchase transactions:</td><td></td><td></td><td></td></tr><tr><td>Fair value of assets acquired, net of cash acquired</td><td>$ 1,535</td><td>$ 266</td><td>$ 1,044</td></tr><tr><td>Less: Fair value of liabilities assumed</td><td>(300)</td><td>(40)</td><td>(211)</td></tr><tr><td>Cash paid for acquired businesses, net of cash acquired</td><td>$ 1,235</td><td>$ 226</td><td>$ 833</td></tr></table>

The accompanying notes are an integral part of the consolidated financial statements.



# Humana Inc.

# NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

## 1. REPORTING ENTITY

## Nature of Operations

Headquartered in Louisville, Kentucky, Humana is a leading health care company that offers a wide range of insurance products and health and wellness services that incorporate an integrated approach to lifelong well-being. References throughout these notes to consolidated financial statements to “we,” “us,” “our,” “Company,” and “Humana,” mean Humana Inc. and its subsidiaries. We derived approximately 75% of our total premiums and services revenue from contracts with the federal government in 2012, including 15% related to our federal government contracts with the Centers for Medicare and Medicaid Services, or CMS, to provide health insurance coverage for Medicare Advantage members in Florida. CMS is the federal government’s agency responsible for administering the Medicare program.

## Health Insurance Reform

In March 2010, the President signed into law The Patient Protection and Affordable Care Act and The Health Care and Education Reconciliation Act of 2010 (which we collectively refer to as the Health Insurance Reform Legislation) which enact significant reforms to various aspects of the U.S. health insurance industry. There are many provisions of the legislation that will require additional guidance and clarification in the form of regulations and interpretations in order to fully understand the impacts of the legislation on our overall business, which we expect to occur over the next several years.

Certain significant provisions of the Health Insurance Reform Legislation include, among others, mandated coverage requirements, rebates to policyholders based on minimum benefit ratios, adjustments to Medicare Advantage premiums, the establishment of federally facilitated or state-based exchanges coupled with programs designed to spread risk among insurers, an annual insurance industry premium-based assessment, and a three-year commercial reinsurance fee. Implementation dates of the Health Insurance Reform Legislation began in September 2010 and continue through 2018.

## 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

## Basis of Presentation

Our financial statements and accompanying notes are prepared in accordance with accounting principles generally accepted in the United States of America. Our consolidated financial statements include the accounts of Humana Inc. and subsidiaries that the Company controls, including variable interest entities associated with medical practices for which the Company is the primary beneficiary. We do not own many of our medical practices but instead enter into exclusive long-term management agreements with the affiliated Professional Associations, or P.A.s, that operate these medical practices. Based upon the provisions of these agreements, these affiliated P.A.s are variable interest entities and we are the primary beneficiary, and accordingly we consolidated the affiliated P.A.s. All significant intercompany balances and transactions have been eliminated.

The preparation of financial statements in accordance with accounting principles generally accepted in the United States of America requires us to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. The areas involving the most significant use of estimates are the estimation of benefits payable, the impact of risk sharing provisions related to our Medicare contracts, the valuation and related impairment recognition of investment securities, and the valuation and related impairment recognition of long-lived assets, including goodwill. These estimates are based on knowledge of current events and anticipated future events, and accordingly, actual results may ultimately differ materially from those estimates.



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

## Cash and Cash Equivalents

Cash and cash equivalents include cash, time deposits, money market funds, commercial paper, other money market instruments, and certain U.S. Government securities with an original maturity of three months or less. Carrying value approximates fair value due to the short-term maturity of the investments.

## Investment Securities

Investment securities, which consist entirely of debt securities, have been categorized as available for sale and, as a result, are stated at fair value. Investment securities available for current operations are classified as current assets. Investment securities available for our long-term insurance products and professional liability funding requirements, as well as restricted statutory deposits and venture capital investments, are classified as long-term assets. For the purpose of determining gross realized gains and losses, which are included as a component of investment income in the consolidated statements of income, the cost of investment securities sold is based upon specific identification. Unrealized holding gains and losses, net of applicable deferred taxes, are included as a component of stockholders' equity and comprehensive income until realized from a sale or other-than-temporary impairment.

Under the other-than-temporary impairment model for debt securities held, we recognize an impairment loss in income in an amount equal to the full difference between the amortized cost basis and the fair value when we have the intent to sell the debt security or it is more likely than not we will be required to sell the debt security before recovery of our amortized cost basis. However, if we do not intend to sell the debt security, we evaluate the expected cash flows to be received as compared to amortized cost and determine if a credit loss has occurred. In the event of a credit loss, only the amount of the impairment associated with the credit loss is recognized currently in income with the remainder of the loss recognized in other comprehensive income.

When we do not intend to sell a security in an unrealized loss position, potential other-than-temporary impairment is considered using a variety of factors, including the length of time and extent to which the fair value has been less than cost; adverse conditions specifically related to the industry, geographic area or financial condition of the issuer or underlying collateral of a security; payment structure of the security; changes in credit rating of the security by the rating agencies; the volatility of the fair value changes; and changes in fair value of the security after the balance sheet date. For debt securities, we take into account expectations of relevant market and economic data. For example, with respect to mortgage and asset-backed securities, such data includes underlying loan level data and structural features such as seniority and other forms of credit enhancements. A decline in fair value is considered other-than-temporary when we do not expect to recover the entire amortized cost basis of the security. We estimate the amount of the credit loss component of a debt security as the difference between the amortized cost and the present value of the expected cash flows of the security. The present value is determined using the best estimate of future cash flows discounted at the implicit interest rate at the date of purchase.

## Receivables and Revenue Recognition

We generally establish one-year commercial membership contracts with employer groups, subject to cancellation by the employer group on 30-day written notice. Our Medicare contracts with CMS renew annually. Our military services contracts with the federal government and our contracts with various state Medicaid programs generally are multi-year contracts subject to annual renewal provisions.

## Premiums Revenue

We bill and collect premium remittances from employer groups and members in our Medicare and other individual products monthly. We receive monthly premiums from the federal government and various states



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

according to government specified payment rates and various contractual terms. Changes in revenues from CMS for our Medicare products resulting from the periodic changes in risk-adjustment scores derived from medical diagnoses for our membership are recognized when the amounts become determinable and the collectibility is reasonably assured.

Premiums revenue is recognized as income in the period members are entitled to receive services, and is net of estimated uncollectible amounts, retroactive membership adjustments, and beginning January 1, 2011, adjustments to recognize rebates to policyholders under the minimum benefit ratios required under Health Insurance Reform Legislation. We estimate these policyholder rebates by projecting calendar year minimum benefit ratios for the individual, small group, and large group markets, as defined by the Health Insurance Reform Legislation using a methodology prescribed by the Department of Health and Human Services, separately by state and legal entity. Estimated calendar year rebates recognized ratably during the year are revised each period to reflect current experience. Retroactive membership adjustments result from enrollment changes not yet processed, or not yet reported by an employer group or the government. We routinely monitor the collectibility of specific accounts, the aging of receivables, historical retroactivity trends, estimated rebates, as well as prevailing and anticipated economic conditions, and reflect any required adjustments in current operations. Premiums received prior to the service period are recorded as unearned revenues.

## Medicare Part D

We cover prescription drug benefits in accordance with Medicare Part D under multiple contracts with CMS. The payments we receive monthly from CMS and members, which are determined from our annual bid, represent amounts for providing prescription drug insurance coverage. We recognize premiums revenue for providing this insurance coverage ratably over the term of our annual contract. Our CMS payment is subject to risk sharing through the Medicare Part D risk corridor provisions. In addition, receipts for reinsurance and low-income cost subsidies as well as receipts for certain discounts on brand name prescription drugs in the coverage gap represent payments for prescription drug costs for which we are not at risk.

The risk corridor provisions compare costs targeted in our bids to actual prescription drug costs, limited to actual costs that would have been incurred under the standard coverage as defined by CMS. Variances exceeding certain thresholds may result in CMS making additional payments to us or require us to refund to CMS a portion of the premiums we received. We estimate and recognize an adjustment to premiums revenue related to these risk corridor provisions based upon pharmacy claims experience to date as if the annual contract were to terminate at the end of the reporting period. Accordingly, this estimate provides no consideration to future pharmacy claims experience. We record a receivable or payable at the contract level and classify the amount as current or long-term in the consolidated balance sheets based on the timing of expected settlement.

Reinsurance and low-income cost subsidies represent funding from CMS in connection with the Medicare Part D program for which we assume no risk. Reinsurance subsidies represent funding from CMS for its portion of prescription drug costs which exceed the member’s out-of-pocket threshold, or the catastrophic coverage level. Low-income cost subsidies represent funding from CMS for all or a portion of the deductible, the coinsurance and co-payment amounts above the out-of-pocket threshold for low-income beneficiaries. Monthly prospective payments from CMS for reinsurance and low-income cost subsidies are based on assumptions submitted with our annual bid. A reconciliation and related settlement of CMS’s prospective subsidies against actual prescription drug costs we paid is made after the end of the year. Beginning in 2011, the Health Reform Legislation mandates consumer discounts of 50% on brand name prescription drugs for Part D plan participants in the coverage gap. These discounts are funded by CMS and pharmaceutical manufacturers while we administer the application of these funds. We account for these subsidies and discounts as a deposit in our consolidated balance sheets and as a



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

financing activity in our consolidated statements of cash flows. We do not recognize premiums revenue or benefit expenses for these subsidies or discounts. Receipt and payment activity is accumulated at the contract level and recorded in our consolidated balance sheets in other current assets or trade accounts payable and accrued expenses depending on the contract balance at the end of the reporting period.

For plans where we provide enhanced benefits and selected the alternative demonstration payment option in lieu of the reinsurance subsidy, we receive a monthly per member capitation amount from CMS determined from our annual bid submissions. The capitation amount we receive from CMS for assuming the government’s portion of prescription drug costs in the catastrophic layer of coverage is recorded as premiums revenue. The variance between the capitation amount and actual drug costs in the catastrophic layer is subject to risk sharing as part of the risk corridor settlement. The demonstration provision terminated at the end of 2010. See Note 6 for detail regarding amounts recorded to the consolidated balance sheets related to the risk corridor settlement and subsidies from CMS.

Settlement of the reinsurance and low-income cost subsidies as well as the brand name prescription drug discounts and risk corridor payment is based on a reconciliation made approximately 9 months after the close of each calendar year. We continue to revise our estimates with respect to the risk corridor provisions based on subsequent period pharmacy claims data.

## Military services

Military services premiums and services revenue primarily is derived from our TRICARE South Region contract with the Department of Defense, or DoD. On April 1, 2012, we began delivering services under a new TRICARE South Region contract with the DoD. Under the new contract, we provide administrative services, including offering access to our provider networks and clinical programs, claim processing, customer service, enrollment, and other services, while the federal government retains all of the risk of the cost of health benefits. Under the terms of the new TRICARE South Region contract, we do not record premiums revenue or benefits expense in our consolidated statements of income related to these health care costs and related reimbursements. Instead, we account for revenues under the new contract net of estimated health care costs similar to an administrative services fee only agreement.

Our TRICARE members are served by both in-network and out-of-network providers in accordance with the new contract. We pay health care costs related to these services to the providers and are subsequently reimbursed by the DoD for such payments. We account for the payments associated with these health care costs and the related reimbursements under deposit accounting in our consolidated balance sheets and as a financing activity under receipts (withdrawals) from contract deposits in our consolidated statements of cash flows. For the first nine months of the new contract, April 1, 2012 to December 31, 2012, health care cost payments were $2.1 billion, exceeding reimbursements of $2.0 billion by $56 million.

Our previous TRICARE South Region contract that expired on March 31, 2012 provided a financial interest in the underlying health care cost; therefore, we reported revenues on a gross basis. We shared the risk with the federal government for the cost of health benefits incurred under our previous contract, earning more revenue or incurring additional cost based on the variance of actual health care costs from an annually negotiated target health care cost. TRICARE revenues consisted generally of (1) an insurance premium for assuming underwriting risk for the cost of civilian health care services delivered to eligible beneficiaries; (2) health care services provided to beneficiaries which were in turn reimbursed by the federal government; and (3) administrative services fees related to claim processing, customer service, enrollment, and other services. We recognized the insurance premium as revenue ratably over the period coverage was provided. Health care services



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

reimbursements were recognized as revenue in the period health services were provided. Administrative services fees were recognized as revenue in the period services were performed. We deferred the recognition of any contingent revenues for favorable variances until the end of the contract period when the amount was determinable and the collectibility was reasonably assured. We estimated and recognized contingent benefits expense for unfavorable variances currently in our results of operations.

Revenues also may include change orders attributable to our military services contracts. Change orders represent equitable adjustments for services not originally specified in the contracts. Revenues for these adjustments are recognized when a settlement amount becomes determinable and the collectibility is reasonably assured.

## Services Revenue

## Patient services revenue

Patient services include workers’ compensation injury care and related services as well as other healthcare services related to employer needs or statutory requirements. Patient services revenues are recognized in the period services are provided to the customer when the sales price is fixed or determinable, and are net of contractual allowances.

## Administrative services fees

Administrative services fees cover the processing of claims, offering access to our provider networks and clinical programs, and responding to customer service inquiries from members of self-funded groups. Revenues from providing administration services, also known as administrative services only, or ASO, are recognized in the period services are performed and are net of estimated uncollectible amounts. Under ASO contracts, self-funded employers retain the risk of financing substantially all of the cost of health benefits. However, many ASO customers purchase stop loss insurance coverage from us to cover catastrophic claims or to limit aggregate annual costs. Accordingly, we have recorded premiums revenue and benefits expense related to these stop loss insurance contracts. We routinely monitor the collectibility of specific accounts, the aging of receivables, as well as prevailing and anticipated economic conditions, and reflect any required adjustments in current operations. ASO fees received prior to the service period are recorded as unearned revenues.

On April 1, 2012, we began delivering services under a new TRICARE South Region contract with the DoD. As discussed previously, under the new contract, we provide administrative services, including offering access to our provider networks and clinical programs, claim processing, customer service, enrollment, and other services, while the federal government retains all of the risk of the cost of health benefits. We account for revenues under the new contract net of estimated health care costs similar to an administrative services fee only agreement. The new contract includes fixed administrative services fees and incentive fees and penalties. Administrative services fees are recognized as services are performed.

## Receivables

Receivables, including premium receivables, patient services revenue receivables, and ASO fee receivables, are shown net of allowances for estimated uncollectible accounts, retroactive membership adjustments, and contractual allowances.

## Policy Acquisition Costs

Policy acquisition costs are those costs that relate directly to the successful acquisition of new and renewal insurance policies. Such costs include commissions, costs of policy issuance and underwriting, and other costs



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

we incur to acquire new business or renew existing business. We expense policy acquisition costs related to our employer-group prepaid health services policies as incurred. These short-duration employer-group prepaid health services policies typically have a one-year term and may be cancelled upon 30 days notice by the employer group.

Life insurance, annuities, health and other supplemental policies sold to individuals are accounted for as long-duration insurance products because they are expected to remain in force for an extended period beyond one year due to contractual and regulatory requirements. As a result, we defer policy acquisition costs, primarily consisting of commissions, and amortize them over the estimated life of the policies in proportion to premiums earned. Deferred acquisition costs are reviewed to determine if they are recoverable from future income. See Note 17.

## Long-Lived Assets

Property and equipment is recorded at cost. Gains and losses on sales or disposals of property and equipment are included in operating costs. Certain costs related to the development or purchase of internal-use software are capitalized. Depreciation is computed using the straight-line method over estimated useful lives ranging from 3 to 10 years for equipment, 3 to 7 years for computer software, and 20 to 40 years for buildings. Improvements to leased facilities are depreciated over the shorter of the remaining lease term or the anticipated life of the improvement.

We periodically review long-lived assets, including property and equipment and other intangible assets, for impairment whenever adverse events or changes in circumstances indicate the carrying value of the asset may not be recoverable. Losses are recognized for a long-lived asset to be held and used in our operations when the undiscounted future cash flows expected to result from the use of the asset are less than its carrying value. We recognize an impairment loss based on the excess of the carrying value over the fair value of the asset. A long-lived asset held for sale is reported at the lower of the carrying amount or fair value less costs to sell. Depreciation expense is not recognized on assets held for sale. Losses are recognized for a long-lived asset to be abandoned when the asset ceases to be used. In addition, we periodically review the estimated lives of all long-lived assets for reasonableness.

## Goodwill and Other Intangible Assets

Goodwill represents the unamortized excess of cost over the fair value of the net tangible and other intangible assets acquired. We are required to test at least annually for impairment at a level of reporting referred to as the reporting unit, and more frequently if adverse events or changes in circumstances indicate that the asset may be impaired. A reporting unit either is our operating segments or one level below the operating segments, referred to as a component, which comprise our reportable segments. A component is considered a reporting unit if the component constitutes a business for which discrete financial information is available that is regularly reviewed by management. We aggregate the components of an operating segment into one reporting unit if they have similar economic characteristics. Goodwill is assigned to the reporting unit that is expected to benefit from a specific acquisition.

We use a two-step process to review goodwill for impairment. The first step is a screen for potential impairment, and the second step measures the amount of impairment, if any. Impairment tests are performed, at a minimum, in the fourth quarter of each year supported by our long-range business plan and annual planning process. We rely on an evaluation of future discounted cash flows to determine fair value of our reporting units. Impairment tests completed for 2012, 2011, and 2010 did not result in an impairment loss. Beginning with 2012 we are allowed to first assess qualitative factors to determine whether it is necessary to perform the two-step quantitative goodwill impairment test. We did not elect to use the qualitative approach for 2012.



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

Other intangible assets primarily relate to acquired customer contracts/relationships and are included with other long-term assets in the consolidated balance sheets. Other intangible assets are amortized over the useful life, based upon the pattern of future cash flows attributable to the asset. This sometimes results in an accelerated method of amortization for customer contracts because the asset tends to dissipate at a more rapid rate in earlier periods. Other than customer contracts, other intangible assets generally are amortized using the straight-line method. We review other finite-lived intangible assets for impairment under our long-lived asset policy.

## Benefits Payable and Benefits Expense Recognition

Benefits expense includes claim payments, capitation payments, pharmacy costs net of rebates, allocations of certain centralized expenses and various other costs incurred to provide health insurance coverage to members, as well as estimates of future payments to hospitals and others for medical care and other supplemental benefits provided prior to the balance sheet date. Capitation payments represent monthly contractual fees disbursed to primary care and other providers who are responsible for providing medical care to members. Pharmacy costs represent payments for members' prescription drug benefits, net of rebates from drug manufacturers. Receivables for such pharmacy rebates are included in other current assets in the consolidated balance sheets. Other supplemental benefits include dental, vision, and other supplemental health and financial protection products.

We estimate the costs of our benefits expense payments using actuarial methods and assumptions based upon claim payment patterns, medical cost inflation, historical developments such as claim inventory levels and claim receipt patterns, and other relevant factors, and record benefit reserves for future payments. We continually review estimates of future payments relating to claims costs for services incurred in the current and prior periods and make necessary adjustments to our reserves.

We reassess the profitability of our contracts for providing insurance coverage to our members when current operating results or forecasts indicate probable future losses. We establish a premium deficiency liability in current operations to the extent that the sum of expected future costs, claim adjustment expenses, and maintenance costs exceeds related future premiums under contracts without consideration of investment income. For purposes of determining premium deficiencies, contracts are grouped in a manner consistent with our method of acquiring, servicing, and measuring the profitability of such contracts. Losses recognized as a premium deficiency result in a beneficial effect in subsequent periods as operating losses under these contracts are charged to the liability previously established. Because the majority of our member contracts renew annually, we do not anticipate recording a material premium deficiency liability, except when unanticipated adverse events or changes in circumstances indicate otherwise.

We believe our benefits payable are adequate to cover future claims payments required. However, such estimates are based on knowledge of current events and anticipated future events. Therefore, the actual liability could differ materially from the amounts provided.

## Future policy benefits payable

Future policy benefits payable include liabilities for long-duration insurance policies including life insurance, annuities, health, and long-term care policies sold to individuals for which some of the premium received in the earlier years is intended to pay anticipated benefits to be incurred in future years. These reserves are recognized on a net level premium method based on interest, mortality, morbidity, withdrawal and maintenance expense assumptions from published actuarial tables, modified based upon actual experience. Changes in estimates of these reserves are recognized as an adjustment to benefits expense in the period the changes occur. We adjust future policy benefits payable for the additional liability that would have been recorded if investment securities backing the liability had been sold at their stated aggregate fair value and the proceeds reinvested at current yields. We include the impact of this adjustment, net of applicable deferred taxes, with the change in unrealized investment gain (loss) in accumulated other comprehensive income in stockholders' equity.



# Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

## Book Overdraft

Under our cash management system, checks issued but not yet presented to banks frequently result in overdraft balances for accounting purposes and are classified as a current liability in the consolidated balance sheets. Changes in book overdrafts from period to period are reported in the consolidated statement of cash flows as a financing activity.

## Income Taxes

We recognize an asset or liability for the deferred tax consequences of temporary differences between the tax bases of assets or liabilities and their reported amounts in the consolidated financial statements. These temporary differences will result in taxable or deductible amounts in future years when the reported amounts of the assets or liabilities are recovered or settled. We also recognize the future tax benefits such as net operating and capital loss carryforwards as deferred tax assets. A valuation allowance is provided against these deferred tax assets if it is more likely than not that some portion or all of the deferred tax assets will not be realized. Future years' tax expense may be increased or decreased by adjustments to the valuation allowance or to the estimated accrual for income taxes.

We record tax benefits when it is more likely than not that the tax return position taken with respect to a particular transaction will be sustained. A liability, if recorded, is not considered resolved until the statute of limitations for the relevant taxing authority to examine and challenge the tax position has expired, or the tax position is ultimately settled through examination, negotiation, or litigation. We classify interest and penalties associated with uncertain tax positions in our provision for income taxes.

## Derivative Financial Instruments

At times, we may use interest-rate swap agreements to manage our exposure to interest rate risk. The differential between fixed and variable rates to be paid or received is accrued and recognized over the life of the agreements as adjustments to interest expense in the consolidated statements of income. We were not party to any interest-rate swap agreements in 2012, 2011, or 2010.

## Stock-Based Compensation

We generally recognize stock-based compensation expense, as determined on the date of grant at fair value, on a straight-line basis over the period during which an employee is required to provide service in exchange for the award (the vesting period). However, for awards granted to retirement eligible employees, the compensation expense is recognized on a straight-line basis over the shorter of the requisite service period or the period from the date of grant to an employee’s eligible retirement date. We estimate expected forfeitures and recognize compensation expense only for those awards which are expected to vest. We estimate the grant-date fair value of stock options using the Black-Scholes option-pricing model. In addition, we report certain tax effects of stock-based compensation as a financing activity rather than an operating activity in the consolidated statement of cash flows. Additional detail regarding our stock-based compensation plans is included in Note 12.

## Earnings Per Common Share

We compute basic earnings per common share on the basis of the weighted-average number of unrestricted common shares outstanding. Diluted earnings per common share is computed on the basis of the weighted-average number of unrestricted common shares outstanding plus the dilutive effect of outstanding employee stock options and restricted shares, or units, using the treasury stock method.



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

## Fair Value

Assets and liabilities measured at fair value are categorized into a fair value hierarchy based on whether the inputs to valuation techniques are observable or unobservable. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect our own assumptions about the assumptions market participants would use. The fair value hierarchy includes three levels of inputs that may be used to measure fair value as described below.

Level 1 – Quoted prices in active markets for identical assets or liabilities. Level 1 assets and liabilities include debt securities that are traded in an active exchange market.

Level 2 – Observable inputs other than Level 1 prices such as quoted prices in active markets for similar assets or liabilities, quoted prices for identical or similar assets or liabilities in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 2 assets and liabilities include debt securities with quoted prices that are traded less frequently than exchange-traded instruments as well as debt securities whose value is determined using a pricing model with inputs that are observable in the market or can be derived principally from or corroborated by observable market data.

Level 3 – Unobservable inputs that are supported by little or no market activity and are significant to the fair value of the assets or liabilities. Level 3 includes assets and liabilities whose value is determined using pricing models, discounted cash flow methodologies, or similar techniques reflecting our own assumptions about the assumptions market participants would use as well as those requiring significant management judgment.

Fair value of actively traded debt securities are based on quoted market prices. Fair value of other debt securities are based on quoted market prices of identical or similar securities or based on observable inputs like interest rates generally using a market valuation approach, or, less frequently, an income valuation approach and are generally classified as Level 2. We obtain at least one quoted price for each security from a third party pricing service. These prices are generally derived from recently reported trades for identical or similar securities, including adjustments through the reporting date based upon observable market information. When quoted prices are not available, the third party pricing service may use quoted market prices of comparable securities or discounted cash flow analyses, incorporating inputs that are currently observable in the markets for similar securities. Inputs that are often used in the valuation methodologies include benchmark yields, reported trades, credit spreads, broker quotes, default rates, and prepayment speeds. We are responsible for the determination of fair value and as such we perform analysis on the prices received from the third party pricing service to determine whether the prices are reasonable estimates of fair value. Our analysis includes a review of monthly price fluctuations as well as a quarterly comparison of the prices received from the pricing service to prices reported by our third party investment advisor. In addition, on a quarterly basis we examine the underlying inputs and assumptions for a sample of individual securities across asset classes, credit rating levels, and various durations.

Fair value of privately held debt securities, including venture capital investments as well as auction rate securities, are estimated using a variety of valuation methodologies, including both market and income approaches, where an observable quoted market does not exist and are generally classified as Level 3. For privately-held debt securities, such methodologies include reviewing the value ascribed to the most recent financing, comparing the security with securities of publicly-traded companies in similar lines of business, and reviewing the underlying financial performance including estimating discounted cash flows. Auction rate securities are debt instruments with interest rates that reset through periodic short-term auctions. From time to time, liquidity issues in the credit markets have led to failed auctions. Given the liquidity issues, fair value could



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

not be estimated based on observable market prices, and as such, unobservable inputs were used. For auction rate securities, valuation methodologies include consideration of the quality of the sector and issuer, underlying collateral, underlying final maturity dates, and liquidity.

## Recently Issued Accounting Pronouncements

There are no recently issued accounting standards that apply to us or that will have a material impact on our results of operations, financial condition, or cash flows.

## 3. ACQUISITIONS

On December 21, 2012, we acquired Metropolitan Health Networks, Inc., or Metropolitan, a Medical Services Organization, or MSO, that coordinates medical care for Medicare Advantage beneficiaries and Medicaid recipients, primarily in Florida. We paid $11.25 per share in cash to acquire all of the outstanding shares of Metropolitan and repaid all outstanding debt of Metropolitan for a transaction value of $851 million, plus transaction expenses. The preliminary fair values of Metropolitan’s assets acquired and liabilities assumed at the date of the acquisition are summarized as follows:

<table><tr><td></td><td>Metropolitan (in millions)</td></tr><tr><td>Cash and cash equivalents</td><td>$ 49</td></tr><tr><td>Receivables, net</td><td>28</td></tr><tr><td>Other current assets</td><td>40</td></tr><tr><td>Property and equipment</td><td>22</td></tr><tr><td>Goodwill</td><td>569</td></tr><tr><td>Other intangible assets</td><td>263</td></tr><tr><td>Other long-term assets</td><td>1</td></tr><tr><td>Total assets acquired</td><td>972</td></tr><tr><td>Current liabilities</td><td>(22)</td></tr><tr><td>Other long-term liabilities</td><td>(99)</td></tr><tr><td>Total liabilities assumed</td><td>(121)</td></tr><tr><td>Net assets acquired</td><td>$ 851</td></tr></table>

The goodwill was assigned to the Health and Well-Being Services segment and is not deductible for tax purposes. The other intangible assets, which primarily consist of customer contracts and trade names, have a weighted average useful life of 8.4 years.

On October 29, 2012, we acquired a noncontrolling equity interest in MCCI Holdings, LLC, or MCCI, a privately held MSO headquartered in Miami, Florida that coordinates medical care for Medicare Advantage and Medicaid beneficiaries primarily in Florida and Texas.

The Metropolitan and MCCI transactions are expected to provide us with components of a successful integrated care delivery model that has demonstrated scalability to new markets. A substantial portion of the revenues for both Metropolitan and MCCI are derived from services provided to Humana Medicare Advantage members under capitation contracts with our health plans. In addition, Metropolitan and MCCI provide services to Medicare Advantage and Medicaid members under capitation contracts with third party health plans. Under these capitation agreements with Humana and third party health plans, Metropolitan and MCCI assume financial risk associated with these Medicare Advantage and Medicaid members.



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

On July 6, 2012, we acquired SeniorBridge Family Companies, Inc., or SeniorBridge, a chronic-care provider of in-home care for seniors, expanding our existing clinical and home health capabilities and strengthening our offerings for members with complex chronic-care needs. The preliminary allocation of the purchase price resulted in goodwill of $99 million and other intangible assets of $14 million. The goodwill was assigned to the Health and Well-Being Services segment and is not deductible for tax purposes. The other intangible assets, which primarily consist of customer contracts, trade name, and technology, have a weighted average useful life of 5.2 years.

Effective March 31, 2012, we acquired Arcadian Management Services, Inc., or Arcadian, a Medicare Advantage health maintenance organization (HMO) serving members in 15 U.S. states, increasing Medicare membership and expanding our Medicare footprint and future growth opportunities in these areas. The allocation of the purchase price resulted in goodwill of $44 million and other intangible assets of $38 million. The goodwill was assigned to the Retail segment and is not deductible for tax purposes. The other intangible assets, which primarily consist of customer contracts and provider contracts, have a weighted average useful life of 9.7 years.

On December 6, 2011, we acquired Anvita, Inc., or Anvita, a San Diego-based health care analytics company. The Anvita acquisition provides scalable analytics solutions that produce clinical insights which we expect to enhance our ability to improve the quality and lower the cost of health care for our members and customers. The allocation of the purchase price resulted in goodwill of $116 million and other intangible assets of $60 million. The goodwill was assigned to the Retail segment and is not deductible for tax purposes. The other intangible assets, which primarily consist of technology, have a weighted average useful life of 6.5 years.

On December 21, 2010, we acquired Concentra Inc., or Concentra, a health care company based in Addison, Texas, for $805 million. During 2011, we accrued and paid $6 million related to the final determination of working capital that existed at the acquisition date and recorded immaterial adjustments to the acquisition date fair value of Concentra's net tangible assets acquired with a corresponding adjustment to goodwill. Through its affiliated clinicians, Concentra delivers occupational medicine, urgent care, physical therapy, and wellness services to workers and the general public through its operation of medical centers and worksite medical facilities. The Concentra acquisition provided us entry into this space on a national scale, offering additional means for achieving health and wellness solutions and providing an expandable platform for growth. The total consideration of $811 million exceeded our estimated fair value of the net tangible assets acquired by approximately $725 million, of which we allocated $188 million to other intangible assets and $537 million to goodwill. The goodwill was assigned to the Health and Well-Being Services segment. Approximately $58 million of the acquired goodwill is deductible for tax purposes. The other intangible assets, which primarily consist of customer relationships and trade name, have a weighted average useful life of 13.7 years.

The purchase price allocations of Metropolitan and SeniorBridge are preliminary, subject to completion of valuation analyses, including, for example, refining assumptions used to calculate the fair value of other intangible assets. The results of operations and financial condition of Metropolitan, SeniorBridge, Arcadian, Anvita, and Concentra have been included in our consolidated statements of income and consolidated balance sheets from the acquisition dates. In addition, during 2012 and 2011, we acquired other health and wellness and technology related businesses which, individually or in the aggregate, have not had, or are not expected to have, a material impact on our results of operations, financial condition, or cash flows. In 2012, we recognized acquisition-related costs in connection with 2012 acquisitions of $27 million. Acquisition-related costs were not material in 2011 or 2010. The pro forma financial information assuming the acquisitions had occurred as of the beginning of the calendar year prior to the year of acquisition, as well as the revenues and earnings generated during the current year were not material for disclosure purposes.



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

## 4. INVESTMENT SECURITIES

Investment securities classified as current and long-term were as follows at December 31, 2012 and 2011, respectively:

<table><tr><td></td><td>Amortized Cost</td><td>Gross Unrealized Gains</td><td>Gross Unrealized Losses</td><td>Fair Value</td></tr><tr><td></td><td colspan="4">(in millions)</td></tr><tr><td>December 31, 2012</td><td></td><td></td><td></td><td></td></tr><tr><td>U.S. Treasury and other U.S. government corporations and agencies:</td><td></td><td></td><td></td><td></td></tr><tr><td>U.S. Treasury and agency obligations</td><td>$ 602</td><td>$ 16</td><td>$ 0</td><td>$ 618</td></tr><tr><td>Mortgage-backed securities</td><td>1,519</td><td>85</td><td>(1)</td><td>1,603</td></tr><tr><td>Tax-exempt municipal securities</td><td>2,890</td><td>185</td><td>(4)</td><td>3,071</td></tr><tr><td>Mortgage-backed securities:</td><td></td><td></td><td></td><td></td></tr><tr><td>Residential</td><td>33</td><td>2</td><td>(1)</td><td>34</td></tr><tr><td>Commercial</td><td>615</td><td>44</td><td>0</td><td>659</td></tr><tr><td>Asset-backed securities</td><td>66</td><td>2</td><td>0</td><td>68</td></tr><tr><td>Corporate debt securities</td><td>3,394</td><td>402</td><td>(2)</td><td>3,794</td></tr><tr><td>Total debt securities</td><td>$9,119</td><td>$736</td><td>$ (8)</td><td>$9,847</td></tr><tr><td>December 31, 2011</td><td></td><td></td><td></td><td></td></tr><tr><td>U.S. Treasury and other U.S. government corporations and agencies:</td><td></td><td></td><td></td><td></td></tr><tr><td>U.S. Treasury and agency obligations</td><td>$ 705</td><td>$ 20</td><td>$ 0</td><td>$ 725</td></tr><tr><td>Mortgage-backed securities</td><td>1,701</td><td>85</td><td>(2)</td><td>1,784</td></tr><tr><td>Tax-exempt municipal securities</td><td>2,709</td><td>149</td><td>(2)</td><td>2,856</td></tr><tr><td>Mortgage-backed securities:</td><td></td><td></td><td></td><td></td></tr><tr><td>Residential</td><td>46</td><td>0</td><td>(2)</td><td>44</td></tr><tr><td>Commercial</td><td>356</td><td>25</td><td>0</td><td>381</td></tr><tr><td>Asset-backed securities</td><td>82</td><td>1</td><td>0</td><td>83</td></tr><tr><td>Corporate debt securities</td><td>3,329</td><td>262</td><td>(11)</td><td>3,580</td></tr><tr><td>Total debt securities</td><td>$8,928</td><td>$542</td><td>$(17)</td><td>$9,453</td></tr></table>



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

Gross unrealized losses and fair values aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position were as follows at December 31, 2012 and 2011, respectively:

<table><tr><td rowspan="2"></td><td colspan="2">Less than 12 months</td><td colspan="2">12 months or more</td><td colspan="2">Total</td></tr><tr><td>Fair Value</td><td>Gross Unrealized Losses</td><td>Fair Value</td><td>Gross Unrealized Losses</td><td>Fair Value</td><td>Gross Unreali</td></tr><tr><td>December 31, 2012</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>U.S. Treasury and other U.S. government corporations and agencies:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>U.S. Treasur and agency obligations</td><td>$ 56</td><td>$ 0</td><td>$ 2</td><td>$ 0</td><td>$ 58</td><td>$ 0</td></tr><tr><td>Mortgage-backed securities</td><td>38</td><td>0</td><td>25</td><td>(1)</td><td>63</td><td>(1)</td></tr><tr><td>Tax-exempt municipal securities</td><td>233</td><td>(3)</td><td>27</td><td>(1)</td><td>260</td><td>(4)</td></tr><tr><td>Mortgage-backed securities:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Residential</td><td>0</td><td>0</td><td>4</td><td>(1)</td><td>4</td><td>(1)</td></tr><tr><td>Commercial</td><td>94</td><td>0</td><td>0</td><td>0</td><td>94</td><td>0</td></tr><tr><td>Asset-backed securities</td><td>2</td><td>0</td><td>4</td><td>0</td><td>6</td><td>0</td></tr><tr><td>Corporate debt securities</td><td>104</td><td>(2)</td><td>4</td><td>0</td><td>108</td><td>(2)</td></tr><tr><td>Total debt securities</td><td>$527</td><td>$ (5)</td><td>$ 66</td><td>$ (3)</td><td>$593</td><td>$ (8)</td></tr><tr><td>December 31, 2011</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>U.S. Treasury and other U.S. government corporations and agencies:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>U.S. Treasur and agency obligations</td><td>$117</td><td>$ 0</td><td>$ 0</td><td>$ 0</td><td>$117</td><td>$ 0</td></tr><tr><td>Mortgage-backed securities</td><td>67</td><td>(1)</td><td>18</td><td>(1)</td><td>85</td><td>(2)</td></tr><tr><td>Tax-exempt municipal securities</td><td>53</td><td>0</td><td>48</td><td>(2)</td><td>101</td><td>(2)</td></tr><tr><td>Mortgage-backed securities:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Residential</td><td>3</td><td>0</td><td>24</td><td>(2)</td><td>27</td><td>(2)</td></tr><tr><td>Commercial</td><td>14</td><td>0</td><td>0</td><td>0</td><td>14</td><td>0</td></tr><tr><td>Asset-backed securities</td><td>16</td><td>0</td><td>4</td><td>0</td><td>20</td><td>0</td></tr><tr><td>Corporate debt securities</td><td>355</td><td>(10)</td><td>41</td><td>(1)</td><td>396</td><td>(11)</td></tr><tr><td>Total debt securities</td><td>$625</td><td>$ (11)</td><td>$135</td><td>$ (6)</td><td>$760</td><td>$ (17)</td></tr></table>

Approximately 94% of our debt securities were investment-grade quality, with a weighted average credit rating of AA- by S&P at December 31, 2012. Most of the debt securities that were below investment-grade were rated BB, the higher end of the below investment-grade rating scale. At December 31, 2012, 10% of our tax-exempt municipal securities were pre-refunded, generally with U.S. government and agency securities. Tax-exempt municipal securities that were not pre-refunded were diversified among general obligation bonds of U.S. states and local municipalities as well as special revenue bonds. General obligation bonds, which are backed by the taxing power and full faith of the issuer, accounted for 40% of the tax-exempt municipals that were not pre-refunded in the portfolio. Special revenue bonds, issued by a municipality to finance a specific public works project such as utilities, water and sewer, transportation, or education, and supported by the revenues of that project, accounted for the remaining 60% of these municipals. Our general obligation bonds are diversified across the U.S. with no individual state exceeding 11%. In addition, 20% of our tax-exempt securities were insured by bond insurers and had an equivalent weighted average S&P credit rating of AA- exclusive of the bond insurers' guarantee. Our investment policy limits investments in a single issuer and requires diversification among various asset types.



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

The recoverability of our non-agency residential and commercial mortgage-backed securities is supported by factors such as seniority, underlying collateral characteristics and credit enhancements. These residential and commercial mortgage-backed securities at December 31, 2012 primarily were composed of senior tranches having high credit support, with over 99% of the collateral consisting of prime loans. The weighted average credit rating of all commercial mortgage-backed securities was AA+ at December 31, 2012.

The percentage of corporate securities associated with the financial services industry was 22.8% at December 31, 2012 and 19.3% at December 31, 2011.

Several European countries, including Spain, Italy, Ireland, Portugal, and Greece, have been subject to credit deterioration due to weakness in their economic and fiscal situations. We have no direct exposure to sovereign issuances of these five countries.

All issuers of securities we own that were trading at an unrealized loss at December 31, 2012 remain current on all contractual payments. After taking into account these and other factors previously described, we believe these unrealized losses primarily were caused by an increase in market interest rates and tighter liquidity conditions in the current markets than when the securities were purchased. At December 31, 2012, we did not intend to sell the securities with an unrealized loss position in accumulated other comprehensive income, and it is not likely that we will be required to sell these securities before recovery of their amortized cost basis. As a result, we believe that the securities with an unrealized loss were not other-than-temporarily impaired at December 31, 2012.

The detail of realized gains (losses) related to investment securities and included within investment income was as follows for the years ended December 31, 2012, 2011, and 2010:

<table><tr><td></td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td></td><td colspan="3">(in millions)</td></tr><tr><td>Gross realized gains</td><td>$38</td><td>$ 33</td><td>$ 35</td></tr><tr><td>Gross realized losses</td><td>(5)</td><td>(22)</td><td>(29)</td></tr><tr><td>Net realized capital gains</td><td>$33</td><td>$ 11</td><td>$ 6</td></tr></table>

There were no material other-than-temporary impairments in 2012, 2011, or 2010.

The contractual maturities of debt securities available for sale at December 31, 2012, regardless of their balance sheet classification, are shown below. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.

<table><tr><td></td><td>Amortized Cost</td><td>Fair Value</td></tr><tr><td></td><td colspan="2">(in millions)</td></tr><tr><td>Due within one year</td><td>$ 359</td><td>$ 362</td></tr><tr><td>Due after one year through five years</td><td>1,826</td><td>1,907</td></tr><tr><td>Due after five years through ten years</td><td>2,946</td><td>3,220</td></tr><tr><td>Due after ten years</td><td>1,755</td><td>1,994</td></tr><tr><td>Mortgage and asset-backed securities</td><td>2,233</td><td>2,364</td></tr><tr><td>Total debt securities</td><td>$9,119</td><td>$9,847</td></tr></table>



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

## 5. FAIR VALUE

## Financial Assets

The following table summarizes our fair value measurements at December 31, 2012 and 2011, respectively, for financial assets measured at fair value on a recurring basis:

<table><tr><td rowspan="3"></td><td rowspan="3">Fair Value</td><td colspan="4">Fair Value Measurements Using</td></tr><tr><td>Quoted Prices in Active Markets (Level 1)</td><td>Other Observable Inputs (Level 2)</td><td>Unobservable Inputs (Level 3)</td><td></td></tr><tr><td colspan="4">(in millions)</td></tr><tr><td>December 31, 2012</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Cash equivalents</td><td>$ 1,177</td><td>$1,177</td><td>$ 0</td><td>$ 0</td><td></td><td></td></tr><tr><td>Debt securities:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>U.S. Treasury and other U.S. government corporations and agencies:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>U.S.Treasury and agency obligations</td><td>618</td><td>0</td><td>618</td><td>0</td><td></td><td></td></tr><tr><td>Mortgage-backed securities</td><td>1,603</td><td>0</td><td>1,603</td><td>0</td><td></td><td></td></tr><tr><td>Tax-exempt municipal securities</td><td>3,071</td><td>0</td><td>3,058</td><td>13</td><td></td><td></td></tr><tr><td>Mortgage-backed securities:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Residential</td><td>34</td><td>0</td><td>34</td><td>0</td><td></td><td></td></tr><tr><td>Commercial</td><td>659</td><td>0</td><td>659</td><td>0</td><td></td><td></td></tr><tr><td>Asset-backed securities</td><td>68</td><td>0</td><td>67</td><td>1</td><td></td><td></td></tr><tr><td>Corporate debt securities</td><td>3,794</td><td>0</td><td>3,770</td><td>24</td><td></td><td></td></tr><tr><td>Total debt securities</td><td>9,847</td><td>0</td><td>9,809</td><td>38</td><td></td><td></td></tr><tr><td>Total invested assets</td><td>$11,024</td><td>$1,177</td><td>$9,809</td><td>$38</td><td></td><td></td></tr><tr><td>December 31, 2011</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Cash equivalents</td><td>$ 1,205</td><td>$1,205</td><td>$ 0</td><td>$ 0</td><td></td><td></td></tr><tr><td>Debt securities:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>U.S. Treasury and other U.S. government corporations and agencies:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>U.S.Treasury and agency obligations</td><td>725</td><td>0</td><td>725</td><td>0</td><td></td><td></td></tr><tr><td>Mortgage-backed securities</td><td>1,784</td><td>0</td><td>1,784</td><td>0</td><td></td><td></td></tr><tr><td>Tax-exempt municipal securities</td><td>2,856</td><td>0</td><td>2,840</td><td>16</td><td></td><td></td></tr><tr><td>Mortgage-backed securities:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Residential</td><td>44</td><td>0</td><td>44</td><td>0</td><td></td><td></td></tr><tr><td>Commercial</td><td>381</td><td>0</td><td>381</td><td>0</td><td></td><td></td></tr><tr><td>Asset-backed securities</td><td>83</td><td>0</td><td>82</td><td>1</td><td></td><td></td></tr><tr><td>Corporate debt securities</td><td>3,580</td><td>0</td><td>3,556</td><td>24</td><td></td><td></td></tr><tr><td>Total debt securities</td><td>9,453</td><td>0</td><td>9,412</td><td>41</td><td></td><td></td></tr><tr><td>Total invested assets</td><td>$10,658</td><td>$1,205</td><td>$9,412</td><td>$41</td><td></td><td></td></tr></table>

There were no material transfers between Level 1 and Level 2 during 2012 or 2011.



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

Our Level 3 assets had a fair value of $38 million at December 31, 2012, or less than 0.4% of our total invested assets. During the years ended December 31, 2012, 2011, and 2010, the changes in the fair value of the assets measured using significant unobservable inputs (Level 3) were comprised of the following:

For the years ended December 31,

<table><tr><td rowspan="2"></td><td colspan="2">2012</td><td colspan="2">2011</td><td colspan="2">2010</td></tr><tr><td>Private Placements/ Venture Capital</td><td>Auction Rate Securities</td><td>Total</td><td>Private Placements/ Venture Capital</td><td>Auction Rate Securities</td><td>Total</td></tr><tr><td></td><td></td><td></td><td></td><td>(in millions)</td><td></td><td></td></tr><tr><td>Beginning balance at January 1</td><td>$25</td><td>$16</td><td>$41</td><td>$14</td><td>$52</td><td>$66</td></tr><tr><td>Total gains or losses:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Realized in earnings</td><td>0</td><td>0</td><td>0</td><td>1</td><td>1</td><td>2</td></tr><tr><td>Unrealized in other comprehensive income</td><td>0</td><td>0</td><td>0</td><td>0</td><td>1</td><td>(4)</td></tr><tr><td>Purchases</td><td>0</td><td>0</td><td>0</td><td>17</td><td>0</td><td>17</td></tr><tr><td>Sales</td><td>0</td><td>(3)</td><td>(3)</td><td>(7)</td><td>(38)</td><td>(45)</td></tr><tr><td>Settlements</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>(2)</td></tr><tr><td>Balance at December 31</td><td>$25</td><td>$13</td><td>$38</td><td>$25</td><td>$16</td><td>$41</td></tr></table>

## Financial Liabilities

Our long-term debt, recorded at carrying value in our consolidated balance sheets, was $2,611 million at December 31, 2012 and $1,659 million at December 31, 2011. The fair value of our long-term debt was $2,923 million at December 31, 2012 and $1,834 million at December 31, 2011. The fair value of our long-term debt is determined based on Level 2 inputs, including quoted market prices for the same or similar debt, or if no quoted market prices are available, on the current prices estimated to be available to us for debt with similar terms and remaining maturities.

## Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

As disclosed in Note 3, we completed our acquisitions of Metropolitan, SeniorBridge, Arcadian, Anvita, Concentra, and other companies during 2012, 2011, and 2010. The values of net tangible assets acquired and the resulting goodwill and other intangible assets were recorded at fair value using Level 3 inputs. The majority of the related tangible assets acquired and liabilities assumed were recorded at their carrying values as of the respective dates of acquisition, as their carrying values approximated their fair values due to their short-term nature. The fair values of goodwill and other intangible assets acquired in these acquisitions were internally estimated primarily based on the income approach. The income approach estimates fair value based on the present value of the cash flows that the assets are expected to generate in the future. We developed internal estimates for the expected cash flows and discount rates in the present value calculations. Other than assets acquired and liabilities assumed in these acquisitions, there were no assets or liabilities measured at fair value on a nonrecurring basis during 2012, 2011, or 2010.



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

## 6. MEDICARE PART D

As discussed in Note 2, we cover prescription drug benefits in accordance with Medicare Part D under multiple contracts with CMS. The consolidated balance sheets include the following amounts associated with Medicare Part D as of December 31, 2012 and 2011:

<table><tr><td rowspan="2"></td><td colspan="2">2012</td><td colspan="2">2011</td></tr><tr><td>Risk Corridor Settlement</td><td>CMS Subsidies/ Discounts</td><td>Risk Corridor Settlement</td><td>CMS Subsidies/ Discounts</td></tr><tr><td>Other current assets</td><td>$ 37</td><td>$635</td><td>$ 2</td><td>$363</td></tr><tr><td>Trade accounts payable and accrued expenses</td><td>(393)</td><td>(77)</td><td>(331)</td><td>(139)</td></tr><tr><td>Net current (liability) asset</td><td>$ (356)</td><td>$558</td><td>$ (329)</td><td>$224</td></tr></table>

At December 31, 2012, the net risk corridor payable balance included a payable of $158 million related to the 2011 contract year that was paid in January 2013.

## 7. PROPERTY AND EQUIPMENT, NET

Property and equipment was comprised of the following at December 31, 2012 and 2011:

<table><tr><td></td><td>2012</td><td>2011</td></tr><tr><td></td><td colspan="2">(in millions)</td></tr><tr><td>Land</td><td>$ 20</td><td>$ 18</td></tr><tr><td>Buildings and leasehold improvements</td><td>620</td><td>523</td></tr><tr><td>Equipment</td><td>728</td><td>606</td></tr><tr><td>Computer software</td><td>1,145</td><td>935</td></tr><tr><td></td><td>2,513</td><td>2,082</td></tr><tr><td>Accumulated depreciation</td><td>(1,415)</td><td>(1,170)</td></tr><tr><td>Property and equipment, net</td><td>$ 1,098</td><td>$ 912</td></tr></table>

Depreciation expense was $263 million in 2012, $249 million in 2011, and $225 million in 2010, including amortization expense for capitalized internally developed and purchased software of $151 million in 2012, $139 million in 2011, and $136 million in 2010.

## 8. GOODWILL AND OTHER INTANGIBLE ASSETS

Changes in the carrying amount of goodwill for our reportable segments for the years ended December 31, 2012 and 2011 were as follows:

<table><tr><td></td><td>Retail</td><td>Employer Group</td><td>Health &amp; Well-Being Services</td><td>Other Businesses</td><td>Total</td></tr><tr><td>Balance at December 31, 2010</td><td>$593</td><td>$62</td><td>$1,856</td><td>$ 57</td><td>$2,568</td></tr><tr><td>Acquisitions</td><td>161</td><td>0</td><td>8</td><td>0</td><td>169</td></tr><tr><td>Subsequent payments/adjustments</td><td>0</td><td>0</td><td>3</td><td>0</td><td>3</td></tr><tr><td>Balance at December 31, 2011</td><td>$754</td><td>$62</td><td>$1,867</td><td>$ 57</td><td>$2,740</td></tr><tr><td>Acquisitions</td><td>98</td><td>0</td><td>753</td><td>43</td><td>894</td></tr><tr><td>Subsequent payments/adjustments</td><td>(3)</td><td>9</td><td>0</td><td>0</td><td>6</td></tr><tr><td>Balance at December 31, 2012</td><td>$849</td><td>$71</td><td>$2,620</td><td>$100</td><td>$3,640</td></tr></table>



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

The following table presents details of our other intangible assets included in other long-term assets in the accompanying consolidated balance sheets at December 31, 2012 and 2011:

<table><tr><td rowspan="2"></td><td rowspan="2">Weighted Average Life</td><td colspan="3">2012</td><td colspan="3">2011</td></tr><tr><td>Cost</td><td>Accumulated Amortization</td><td>Net</td><td>Cost</td><td>Accumulated Amortization</td><td>Net</td></tr><tr><td>Other intangible assets:</td><td></td><td></td><td></td><td></td><td>(in millions)</td><td></td><td></td></tr><tr><td>Customer contracts/relationships</td><td>9.5 yrs</td><td>$ 733</td><td>$237</td><td>$496</td><td>$429</td><td>$182</td><td>$247</td></tr><tr><td>Trade names and technology</td><td>13.6 yrs</td><td>190</td><td>21</td><td>169</td><td>135</td><td>6</td><td>129</td></tr><tr><td>Provider contracts</td><td>15.0 yrs</td><td>51</td><td>19</td><td>32</td><td>44</td><td>15</td><td>29</td></tr><tr><td>Noncompetes and other</td><td>6.5 yrs</td><td>51</td><td>17</td><td>34</td><td>40</td><td>10</td><td>30</td></tr><tr><td>Total other intangible assets</td><td>10.4 yrs</td><td>$1,025</td><td>$294</td><td>$731</td><td>$648</td><td>$213</td><td>$435</td></tr></table>

Amortization expense for other intangible assets was approximately $75 million in 2012, $54 million in 2011 and $38 million in 2010. The following table presents our estimate of amortization expense for each of the five next succeeding fiscal years:

<table><tr><td></td><td>(in millions)</td></tr><tr><td>For the years ending December 31,:</td><td></td></tr><tr><td>2013</td><td>$110</td></tr><tr><td>2014</td><td>102</td></tr><tr><td>2015</td><td>90</td></tr><tr><td>2016</td><td>84</td></tr><tr><td>2017</td><td>76</td></tr></table>

## 9. BENEFITS PAYABLE

Activity in benefits payable, excluding military services, was as follows for the years ended December 31, 2012, 2011 and 2010:

<table><tr><td rowspan="2"></td><td rowspan="2">2012</td><td>2011</td><td>2010</td></tr><tr><td>(in millions)</td><td></td></tr><tr><td>Balances at January 1</td><td>$ 3,415</td><td>$ 3,214</td><td>$ 2,943</td></tr><tr><td>Acquisitions</td><td>66</td><td>29</td><td>0</td></tr><tr><td>Incurred related to:</td><td></td><td></td><td></td></tr><tr><td>Current year</td><td>30,198</td><td>25,834</td><td>24,226</td></tr><tr><td>Prior years</td><td>(257)</td><td>(372)</td><td>(434)</td></tr><tr><td>Total incurred</td><td>29,941</td><td>25,462</td><td>23,792</td></tr><tr><td>Paid related to:</td><td></td><td></td><td></td></tr><tr><td>Current year</td><td>(26,738)</td><td>(22,742)</td><td>(21,309)</td></tr><tr><td>Prior years</td><td>(2,909)</td><td>(2,548)</td><td>(2,212)</td></tr><tr><td>Total paid</td><td>(29,647)</td><td>(25,290)</td><td>(23,521)</td></tr><tr><td>Balances at December 31</td><td>$ 3,775</td><td>$ 3,415</td><td>$ 3,214</td></tr></table>



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

Amounts incurred related to prior years vary from previously estimated liabilities as the claims ultimately are settled. Negative amounts reported for incurred related to prior years result from claims being ultimately settled for amounts less than originally estimated (favorable development).

Actuarial standards require the use of assumptions based on moderately adverse experience, which generally results in favorable reserve development, or reserves that are considered redundant. We experienced favorable medical claims reserve development related to prior fiscal years of $257 million in 2012, $372 million in 2011, and $434 million in 2010. The favorable medical claims reserve development for 2012, 2011, and 2010 primarily reflects the consistent application of trend and completion factors estimated using an assumption of moderately adverse conditions. In addition, the favorable medical claims reserve development for 2011 and 2010 reflect improvements in the claims processing environment and, to a lesser extent, better than originally estimated utilization. The improvements in the claims processing environment benefited all lines of business during 2011 and 2010, but were more significant during 2010, particularly in our Medicare Private Fee-For-Service line of business. As a result of these improvements, during 2011 and 2010 we experienced a significant increase in claim overpayment recoveries for claims incurred in prior years, primarily as a result of increased audits of provider billings, as well as system enhancements that improved the claim recovery functionality. In addition, in 2010, a shortening of the cycle time associated with provider claim submissions was a contributing factor.

Benefits expense associated with military services and provisions associated with future policy benefits excluded from the previous table was as follows for the years ended December 31, 2012, 2011 and 2010:

<table><tr><td></td><td>2012</td><td>2011 (in millions)</td><td>2010</td></tr><tr><td>Military services</td><td>$ 908</td><td>$3,247</td><td>$3,059</td></tr><tr><td>Future policy benefits</td><td>136</td><td>114</td><td>266</td></tr><tr><td>Total</td><td>$1,044</td><td>$3,361</td><td>$3,325</td></tr></table>

Military services benefits payable of $4 million and $339 million at December 31, 2012 and 2011, respectively, primarily consisted of our estimate of incurred healthcare services provided to beneficiaries which are in turn reimbursed by the federal government, as more fully described in Note 2. This amount is generally offset by a corresponding receivable due from the federal government. The declines in military services benefits payable and benefits expense in 2012 relate to the transition to the new TRICARE South Region contract on April 1, 2012, which is accounted for as an administrative services only contract as more fully described in Note 2.

The higher benefits expense associated with future policy benefits payable during 2012 and 2010 relates to reserve strengthening for our closed block of long-term care policies acquired in connection with the 2007 KMG America Corporation, or KMG, acquisition more fully described in Note 17.



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

## 10. INCOME TAXES

The provision for income taxes consisted of the following for the years ended December 31, 2012, 2011 and 2010:

<table><tr><td></td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td></td><td colspan="3">(in millions)</td></tr><tr><td>Current provision:</td><td></td><td></td><td></td></tr><tr><td>Federal</td><td>$708</td><td>$732</td><td>$ 786</td></tr><tr><td>States and Puerto Rico</td><td>61</td><td>62</td><td>63</td></tr><tr><td>Total current provision</td><td>769</td><td>794</td><td>849</td></tr><tr><td>Deferred (benefit) provision</td><td>(80)</td><td>22</td><td>(199)</td></tr><tr><td>Provision for income taxes</td><td>$689</td><td>$816</td><td>$ 650</td></tr></table>

The provision for income taxes was different from the amount computed using the federal statutory rate for the years ended December 31, 2012, 2011 and 2010 due to the following:

<table><tr><td></td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td></td><td colspan="3">(in millions)</td></tr><tr><td>Income tax provision at federal statutory rate</td><td>$669</td><td>$782</td><td>$612</td></tr><tr><td>States, net of federal benefit, and Puerto Rico</td><td>27</td><td>35</td><td>31</td></tr><tr><td>Tax exempt investment income</td><td>(26)</td><td>(25)</td><td>(24)</td></tr><tr><td>Nondeductible executive compensation</td><td>14</td><td>11</td><td>13</td></tr><tr><td>Other, net</td><td>5</td><td>13</td><td>18</td></tr><tr><td>Provision for income taxes</td><td>$689</td><td>$816</td><td>$650</td></tr></table>

The provision for income taxes for 2012, 2011, and 2010 reflects a $14 million, $11 million and $13 million, respectively, estimated impact from limitations on the deductibility of annual compensation in excess of $500,000 per employee as mandated by the Health Insurance Reform Legislation.

As of December 31, 2012, we do not have material uncertain tax positions reflected in our consolidated balance sheet.



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

Deferred income tax balances reflect the impact of temporary differences between the tax bases of assets or liabilities and their reported amounts in our consolidated financial statements, and are stated at enacted tax rates expected to be in effect when the reported amounts are actually recovered or settled. Principal components of our net deferred tax balances at December 31, 2012 and 2011 were as follows:

<table><tr><td rowspan="3"></td><td colspan="2">Assets (Liabilities)</td></tr><tr><td>2012</td><td>2011</td></tr><tr><td colspan="2">(in millions)</td></tr><tr><td>Future policy benefits payable</td><td>$ 246</td><td>$ 179</td></tr><tr><td>Net operating loss carryforward</td><td>203</td><td>181</td></tr><tr><td>Compensation and other accrued expenses</td><td>174</td><td>95</td></tr><tr><td>Benefits payable</td><td>91</td><td>111</td></tr><tr><td>Deferred acquisition costs</td><td>37</td><td>35</td></tr><tr><td>Capital loss carryforward</td><td>13</td><td>13</td></tr><tr><td>Unearned premiums</td><td>11</td><td>11</td></tr><tr><td>Other</td><td>9</td><td>20</td></tr><tr><td>Total deferred income tax assets</td><td>784</td><td>645</td></tr><tr><td>Valuation allowance</td><td>(28)</td><td>(28)</td></tr><tr><td>Total deferred income tax assets, net of valuation allowance</td><td>756</td><td>617</td></tr><tr><td>Depreciable property and intangible assets</td><td>(465)</td><td>(347)</td></tr><tr><td>Investment securities</td><td>(265)</td><td>(191)</td></tr><tr><td>Prepaid expenses</td><td>(59)</td><td>(49)</td></tr><tr><td>Total deferred income tax liabilities</td><td>(789)</td><td>(587)</td></tr><tr><td>Total net deferred income tax (liabilities) assets</td><td>$ (33)</td><td>$ 30</td></tr><tr><td>Amounts recognized in the consolidated balance sheets:</td><td></td><td></td></tr><tr><td>Other long-term assets</td><td>$ 12</td><td>$ 46</td></tr><tr><td>Trade accounts payable and accrued expenses</td><td>(45)</td><td>(16)</td></tr><tr><td>Total net deferred income tax (liabilities) assets</td><td>$ (33)</td><td>$ 30</td></tr></table>

At December 31, 2012, we had approximately $555 million of net operating losses to carry forward related to prior acquisitions. These net operating loss carryforwards, if not used to offset future taxable income, will expire from 2013 through 2031. A significant portion of these losses are in a subsidiary that will not be included in the Humana Inc. consolidated tax return until 2013, and, therefore, may not be used until that point. Due to limitations and uncertainty regarding our ability to use some of the carryforwards, a valuation allowance was established on $77 million of net operating loss carryforwards related to prior acquisitions. For the remainder of the net operating loss carryforwards, based on our historical record of producing taxable income and profitability, we have concluded that future operating income will be sufficient to give rise to tax expense to recover all deferred tax assets.

We file income tax returns in the United States and certain foreign jurisdictions. The U.S. Internal Revenue Service, or IRS, has completed its examinations of our consolidated income tax returns for 2011 and prior years. Our 2012 tax return is under advance review by the IRS under its Compliance Assurance Process. With few exceptions, which are immaterial in the aggregate, we no longer are subject to state, local and foreign tax examinations for years before 2009. As of December 31, 2012, we are not aware of any material adjustments that may be proposed.



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

## 11. DEBT

The carrying value of long-term debt outstanding was as follows at December 31, 2012 and 2011:

<table><tr><td></td><td>2012</td><td>2011</td></tr><tr><td></td><td colspan="2">(in millions)</td></tr><tr><td>Long-term debt:</td><td></td><td></td></tr><tr><td>Senior notes:</td><td></td><td></td></tr><tr><td>$500 million, 6.45% due June 1, 2016</td><td>$523</td><td>$530</td></tr><tr><td>$500 million, 7.20% due June 15, 2018</td><td>506</td><td>507</td></tr><tr><td>$300 million, 6.30% due August 1, 2018</td><td>317</td><td>319</td></tr><tr><td>$600 million, 3.15% due December 1, 2022</td><td>598</td><td>0</td></tr><tr><td>$250 million, 8.15% due June 15, 2038</td><td>267</td><td>267</td></tr><tr><td>$400 million, 4.625% due December 1, 2042</td><td>400</td><td>0</td></tr><tr><td>Total senior notes</td><td>2,611</td><td>1,623</td></tr><tr><td>Other long-term borrowings</td><td>0</td><td>36</td></tr><tr><td>Total long-term debt</td><td>$2,611</td><td>$1,659</td></tr></table>

## Senior Notes

In December 2012, we issued $600 million of 3.15% senior notes due December 1, 2022 and $400 million of 4.625% senior notes due December 1, 2042. Our net proceeds, reduced for the discount and cost of the offering, were $990 million. We used the proceeds from the offering primarily to finance the acquisition of Metropolitan, including the retirement of Metropolitan’s indebtedness, and to pay related fees and expenses.

Our senior notes, which are unsecured, may be redeemed at our option at any time at 100% of the principal amount plus accrued interest and a specified make-whole amount. The 7.20% and 8.15% senior notes are subject to an interest rate adjustment if the debt ratings assigned to the notes are downgraded (or subsequently upgraded). In addition, our 7.20%, 8.15%, 3.15%, and 4.625% senior notes contain a change of control provision that may require us to purchase the notes under certain circumstances.

Prior to 2009, we were parties to interest-rate swap agreements that exchanged the fixed interest rate under our senior notes for a variable interest rate based on LIBOR. As a result, the carrying value of the senior notes was adjusted to reflect changes in value caused by an increase or decrease in interest rates. During 2008, we terminated all of our swap agreements. The cumulative adjustment to the carrying value of our senior notes was $103 million as of the termination date which is being amortized as a reduction to interest expense over the remaining term of the senior notes. The unamortized carrying value adjustment was $64 million as of December 31, 2012 and $74 million as of December 31, 2011.

## Credit Agreement

Our 5-year $1.0 billion unsecured revolving agreement expires in November 2016. Under the credit agreement, at our option, we can borrow on either a competitive advance basis or a revolving credit basis. The revolving credit portion bears interest at either LIBOR plus a spread or the base rate plus a spread. The LIBOR spread, currently 120 basis points, varies depending on our credit ratings ranging from 87.5 to 147.5 basis points. We also pay an annual facility fee regardless of utilization. This facility fee, currently 17.5 basis points, may fluctuate between 12.5 and 27.5 basis points, depending upon our credit ratings. The competitive advance portion of any borrowings will bear interest at market rates prevailing at the time of borrowing on either a fixed rate or a floating rate based on LIBOR, at our option.



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

The terms of the credit agreement include standard provisions related to conditions of borrowing, including a customary material adverse effect clause which could limit our ability to borrow additional funds. In addition, the credit agreement contains customary restrictive and financial covenants as well as customary events of default, including financial covenants regarding the maintenance of a minimum level of net worth of $6.6 billion at December 31, 2012 and a maximum leverage ratio of 3.0:1. We are in compliance with the financial covenants, with actual net worth of $8.8 billion and actual leverage ratio of 1.1:1, as measured in accordance with the credit agreement as of December 31, 2012. In addition, the credit agreement includes an uncommitted $250 million incremental loan facility.

At December 31, 2012, we had no borrowings outstanding under the credit agreement. We have outstanding letters of credit of $5 million secured under the credit agreement. No amounts have been drawn on these letters of credit. Accordingly, as of December 31, 2012, we had $995 million of remaining borrowing capacity under the credit agreement, none of which would be restricted by our financial covenant compliance requirement. We have other customary, arms-length relationships, including financial advisory and banking, with some parties to the credit agreement.

## Other Long-Term Borrowings

In March 2012, we called, without penalty, junior subordinated debt of $36 million. Prior to repayment, the junior subordinated debt bore a fixed annual interest rate of 8.02% payable quarterly until 2012, and then payable at a floating rate based on LIBOR plus 310 basis points.

## 12. EMPLOYEE BENEFIT PLANS

## Employee Savings Plan

We have defined contribution retirement savings plans covering eligible employees. Prior to 2011, our contribution to these plans included contributions to our employees' retirement accounts based on a percentage of compensation as well as matching contributions based on the amount of our employees' contributions to the plans. Beginning in 2011, we ceased making retirement account contributions and increased our matching contributions. The cost of these plans amounted to approximately $138 million in 2012, $126 million in 2011, and $113 million in 2010, all of which was funded currently to the extent it was deductible for federal income tax purposes. The Company's cash match is invested pursuant to the participant's contribution direction. Based on the closing price of our common stock of $68.63 on December 31, 2012, approximately 11% of the retirement and savings plan's assets were invested in our common stock, or approximately 3.4 million shares, representing 2% of the shares outstanding as of December 31, 2012. At December 31, 2012, approximately 5.2 million shares of our common stock were reserved for issuance under our defined contribution retirement savings plans.



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

## Stock-Based Compensation

We have plans under which options to purchase our common stock and restricted stock, including both restricted stock units and restricted stock awards, have been granted to executive officers, directors and key employees. The terms and vesting schedules for stock-based awards vary by type of grant. Generally, the awards vest upon time-based conditions. The stock awards of retirement-eligible participants will continue to vest upon retirement from the Company. Our equity award program includes a retirement provision that generally treats employees with a combination of age and years of service with the Company totaling 65 or greater, with a minimum required age of 55 and a minimum requirement of 5 years of service, as retirement-eligible. Upon exercise, stock-based compensation awards are settled with authorized but unissued company stock or treasury stock. The compensation expense that has been charged against income for these plans was as follows for the years ended December 31, 2012, 2011, and 2010:

<table><tr><td></td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>Stock-based compensation expense by type:</td><td></td><td></td><td></td></tr><tr><td>Stock options</td><td>$ 16</td><td>$ 16</td><td>$ 22</td></tr><tr><td>Restricted stock</td><td>66</td><td>51</td><td>41</td></tr><tr><td>Total stock-based compensation expense</td><td>82</td><td>67</td><td>63</td></tr><tr><td>Tax benefit recognized</td><td>(30)</td><td>(25)</td><td>(23)</td></tr><tr><td>Stock-based compensation expense, net of tax</td><td>$ 52</td><td>$ 42</td><td>$ 40</td></tr></table>

The tax benefit recognized in our consolidated financial statements is based on the amount of compensation expense recorded for book purposes. The actual tax benefit realized in our tax return is based on the intrinsic value, or the excess of the market value over the exercise or purchase price, of stock options exercised and restricted stock vested during the period. The actual tax benefit realized for the deductions taken on our tax returns from option exercises and restricted stock vesting totaled $43 million in 2012, $44 million in 2011, and $15 million in 2010. There was no capitalized stock-based compensation expense during these years.

At December 31, 2012, there were 26.6 million shares reserved for stock award plans. These reserved shares included giving effect to, under the 2003 Plan, 0.5 million shares of common stock available for future grants assuming all stock options or 0.3 million shares available for future grants assuming all restricted stock, and under the 2011 Plan, 16.7 million shares of common stock available for future grants assuming all stock options or 7.3 million shares available for future grants assuming all restricted stock. Shares may be issued from authorized but unissued company stock or treasury stock.

## Stock Options

Stock options are granted with an exercise price equal to the fair market value of the underlying common stock on the date of grant. Our stock plans, as approved by the Board of Directors and stockholders, define fair market value as the average of the highest and lowest composite stock prices reported by the New York Stock Exchange on a given date. Exercise provisions vary, but most options vest in whole or in part 1 to 3 years after grant and expire 7 to 10 years after grant.



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

The weighted-average fair value of each option granted during 2012, 2011, and 2010 is provided below. The fair value was estimated on the date of grant using the Black-Scholes pricing model with the weighted-average assumptions indicated below:

<table><tr><td></td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>Weighted-average fair value at grant date</td><td>$30.15</td><td>$28.29</td><td>$19.58</td></tr><tr><td>Expected option life (years)</td><td>4.4</td><td>4.8</td><td>5.2</td></tr><tr><td>Expected volatility</td><td>46.3%</td><td>46.8%</td><td>43.8%</td></tr><tr><td>Risk-free interest rate at grant date</td><td>0.8%</td><td>1.7%</td><td>2.7%</td></tr><tr><td>Dividend yield (1)</td><td>1.2%</td><td>0.5%</td><td>None</td></tr></table>

(1) As discussed in Note 14, in April 2011, our Board of Directors approved the initiation of a quarterly cash dividend policy.

When valuing employee stock options, we stratify the employee population into three homogenous groups that historically have exhibited similar exercise behaviors. These groups are executive officers, directors, and all other employees. We value the stock options based on the unique assumptions for each of these employee groups.

We calculate the expected term for our employee stock options based on historical employee exercise behavior and base the risk-free interest rate on a traded zero-coupon U.S. Treasury bond with a term substantially equal to the option’s expected term.

The volatility used to value employee stock options is based on historical volatility. We calculate historical volatility using a simple-average calculation methodology based on daily price intervals as measured over the expected term of the option.

Activity for our option plans was as follows for the year ended December 31, 2012:

<table><tr><td></td><td>Shares Under Option</td><td>Weighted-Average Exercise Price</td></tr><tr><td></td><td colspan="2">(shares in thousands)</td></tr><tr><td>Options outstanding at December 31, 2011</td><td>3,144</td><td>$53.60</td></tr><tr><td>Granted</td><td>384</td><td>85.84</td></tr><tr><td>Exercised</td><td>(1,227)</td><td>48.93</td></tr><tr><td>Cancelled</td><td>(9)</td><td>70.24</td></tr><tr><td>Forfeited</td><td>(59)</td><td>51.98</td></tr><tr><td>Options outstanding at December 31, 2012</td><td>2,233</td><td>$61.68</td></tr><tr><td>Options exercisable at December 31, 2012</td><td>1,189</td><td>$57.12</td></tr></table>

As of December 31, 2012, outstanding stock options, substantially all of which are expected to vest, had an aggregate intrinsic value of $25 million, and a weighted-average remaining contractual term of 3.7 years. As of December 31, 2012, exercisable stock options had an aggregate intrinsic value of $15 million, and a weighted-average remaining contractual term of 2.4 years. The total intrinsic value of stock options exercised during 2012 was $45 million, compared with $88 million during 2011 and $11 million during 2010. Cash received from stock option exercises totaled $60 million in 2012, $134 million in 2011, and $17 million in 2010.

Total compensation expense not yet recognized related to nonvested options was $9 million at December 31, 2012. We expect to recognize this compensation expense over a weighted-average period of approximately 1.8 years.



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

## Restricted Stock

Restricted stock is granted with a fair value equal to the market price of our common stock on the date of grant and generally vest three years from the date of grant. The weighted-average grant date fair value of our restricted stock was $85.29 in 2012, $67.70 in 2011, and $49.29 in 2010. Activity for our restricted stock was as follows for the year ended December 31, 2012:

<table><tr><td></td><td>Shares (shares in thousands)</td><td>Weighted-Average Grant-Date Fair Value</td></tr><tr><td>Nonvested restricted stock at December 31, 2011</td><td>2,916</td><td>$53.93</td></tr><tr><td>Granted</td><td>1,002</td><td>85.29</td></tr><tr><td>Vested</td><td>(861)</td><td>43.70</td></tr><tr><td>Forfeited</td><td>(103)</td><td>63.89</td></tr><tr><td>Nonvested restricted stock at December 31, 2012</td><td>2,954</td><td>$67.29</td></tr></table>

The fair value of shares vested during the years ended was $75 million in 2012, $36 million in 2011, and $30 million in 2010. Total compensation expense not yet recognized related to nonvested restricted stock was $70 million at December 31, 2012. We expect to recognize this compensation expense over a weighted-average period of approximately 1.9 years. There are no other contractual terms covering restricted stock once vested.

## 13. EARNINGS PER COMMON SHARE COMPUTATION

Detail supporting the computation of basic and diluted earnings per common share was as follows for the years ended December 31, 2012, 2011 and 2010:

<table><tr><td rowspan="2"></td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td colspan="3">(dollars in millions, except per common share results, number of shares in thousands)</td></tr><tr><td>Net income available for common stockholders</td><td>$ 1,222</td><td>$ 1,419</td><td>$ 1,099</td></tr><tr><td>Weighted-average outstanding shares of common stock used to compute basic earnings per common share</td><td>161,484</td><td>165,413</td><td>167,782</td></tr><tr><td>Dilutive effect of:</td><td></td><td></td><td></td></tr><tr><td>Employee stock options</td><td>576</td><td>959</td><td>676</td></tr><tr><td>Restricted stock</td><td>1,397</td><td>1,455</td><td>1,340</td></tr><tr><td>Shares used to compute diluted earnings per common share</td><td>163,457</td><td>167,827</td><td>169,798</td></tr><tr><td>Basic earnings per common share</td><td>$ 7.56</td><td>$ 8.58</td><td>$ 6.55</td></tr><tr><td>Diluted earnings per common share</td><td>$ 7.47</td><td>$ 8.46</td><td>$ 6.47</td></tr><tr><td>Number of antidilutive stock options and restricted stock awards excluded from computation</td><td>754</td><td>864</td><td>3,820</td></tr></table>



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

## 14. STOCKHOLDERS' EQUITY

## Dividends

In April 2011, our Board of Directors approved the initiation of a quarterly cash dividend policy. Declaration and payment of future quarterly dividends is at the discretion of the Board and may be adjusted as business needs or market conditions change.

The following table provides details of dividend payments in 2011 and 2012:

<table><tr><td>Record Date</td><td>Payment Date</td><td>Amount per Share</td><td>Total Amount (in millions)</td></tr><tr><td>2011 payments</td><td></td><td></td><td></td></tr><tr><td>6/30/2011</td><td>7/28/2011</td><td>$0.25</td><td>$41</td></tr><tr><td>9/30/2011</td><td>10/28/2011</td><td>$0.25</td><td>$41</td></tr><tr><td>2012 payments</td><td></td><td></td><td></td></tr><tr><td>12/30/2011</td><td>1/31/2012</td><td>$0.25</td><td>$41</td></tr><tr><td>3/30/2012</td><td>4/27/2012</td><td>$0.25</td><td>$41</td></tr><tr><td>6/29/2012</td><td>7/27/2012</td><td>$0.26</td><td>$42</td></tr><tr><td>9/28/2012</td><td>10/26/2012</td><td>$0.26</td><td>$41</td></tr></table>

In October 2012, the Board of Directors declared a cash dividend of $0.26 per share that was paid on January 25, 2013, for an aggregate amount of $42 million, to stockholders of record as of the close of business on December 31, 2012.

## Stock Repurchases

In April 2012, the Board of Directors replaced its previously approved share repurchase authorization of up to $1 billion (of which $461 million remained unused) with a new authorization for repurchases of up to $1 billion of our common shares exclusive of shares repurchased in connection with employee stock plans, expiring on June 30, 2014. Under this share repurchase authorization, shares could be purchased from time to time at prevailing prices in the open market, by block purchases, or in privately-negotiated transactions, subject to certain regulatory restrictions on volume, pricing, and timing. During 2012, we repurchased 1.15 million shares in open market transactions for $100 million at an average price of $86.95 under a previously approved share repurchase authorization and we repurchased 5.1 million shares in open market transactions for $360 million at an average price of $70.66 under the new authorization. During 2011, we repurchased 6.8 million shares in open market transactions for $492 million at an average price of $72.75 under previously approved share repurchase authorizations. During 2010, we repurchased 1.99 million shares for $100 million at an average price of $50.17 under previously approved share repurchase authorizations. As of February 1, 2013, the remaining authorized amount under the new authorization totaled $640 million.

In connection with employee stock plans, we acquired 0.7 million common shares for $58 million in 2012, 0.8 million common shares for $49 million in 2011, and 0.2 million common shares for $8 million in 2010.

## Regulatory Requirements

Certain of our subsidiaries operate in states that regulate the payment of dividends, loans, or other cash transfers to Humana Inc., our parent company, and require minimum levels of equity as well as limit investments to approved securities. The amount of dividends that may be paid to Humana Inc. by these subsidiaries, without



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

prior approval by state regulatory authorities, or ordinary dividends, is limited based on the entity’s level of statutory income and statutory capital and surplus. In most states, prior notification is provided before paying a dividend even if approval is not required. Actual dividends paid may vary due to consideration of excess statutory capital and surplus and expected future surplus requirements related to, for example, premium volume and product mix.

Although minimum required levels of equity are largely based on premium volume, product mix, and the quality of assets held, minimum requirements vary significantly at the state level. Our state regulated subsidiaries had aggregate statutory capital and surplus of approximately $5.1 billion and $4.7 billion as of December 31, 2012 and 2011, respectively, which exceeded aggregate minimum regulatory requirements. Excluding Puerto Rico subsidiaries, the amount of ordinary dividends that may be paid to our parent company in 2013 is approximately $911 million in the aggregate. This compares to ordinary dividends that were able to be paid in 2012 of approximately $860 million.

## 15. COMMITMENTS, GUARANTEES AND CONTINGENCIES

## Leases

We lease facilities, computer hardware, and other furniture and equipment under long-term operating leases that are noncancelable and expire on various dates through 2025. We sublease facilities or partial facilities to third party tenants for space not used in our operations. Rent with scheduled escalation terms are accounted for on a straight-line basis over the lease term. Rent expense and sublease rental income, which are recorded net as an operating cost, for all operating leases were as follows for the years ended December 31, 2012, 2011 and 2010:

<table><tr><td></td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td></td><td colspan="3">(in millions)</td></tr><tr><td>Rent expense</td><td>$218</td><td>$207</td><td>$155</td></tr><tr><td>Sublease rental income</td><td>(11)</td><td>(10)</td><td>(9)</td></tr><tr><td>Net rent expense</td><td>$207</td><td>$197</td><td>$146</td></tr></table>

Future annual minimum payments due subsequent to December 31, 2012 under all of our noncancelable operating leases with initial terms in excess of one year are as follows:

<table><tr><td></td><td>Minimum Lease Payments</td><td>Sublease Rental Receipts (in millions)</td><td>Net Lease Commitments</td></tr><tr><td>For the years ending December 31:</td><td></td><td></td><td></td></tr><tr><td>2013</td><td>$212</td><td>$(1)</td><td>$211</td></tr><tr><td>2014</td><td>179</td><td>(1)</td><td>178</td></tr><tr><td>2015</td><td>147</td><td>0</td><td>147</td></tr><tr><td>2016</td><td>110</td><td>0</td><td>110</td></tr><tr><td>2017</td><td>82</td><td>0</td><td>82</td></tr><tr><td>Thereafter</td><td>122</td><td>0</td><td>122</td></tr><tr><td>Total</td><td>$852</td><td>$(2)</td><td>$850</td></tr></table>

## Purchase Obligations

We have agreements to purchase services, primarily information technology related services, or to make improvements to real estate, in each case that are enforceable and legally binding on us and that specify all



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

significant terms, including: fixed or minimum levels of service to be purchased; fixed, minimum or variable price provisions; and the appropriate timing of the transaction. We have purchase obligation commitments of $124 million in 2013, $83 million in 2014, $26 million in 2015, $13 million in 2016, and $16 million thereafter. Purchase obligations exclude agreements that are cancelable without penalty.

## Off-Balance Sheet Arrangements

As part of our ongoing business, we do not participate or knowingly seek to participate in transactions that generate relationships with unconsolidated entities or financial partnerships, such as entities often referred to as structured finance or special purpose entities, or SPEs, which would have been established for the purpose of facilitating off-balance sheet arrangements or other contractually narrow or limited purposes. As of December 31, 2012, we were not involved in any SPE transactions.

## Guarantees and Indemnifications

Through indemnity agreements approved by the state regulatory authorities, certain of our regulated subsidiaries generally are guaranteed by Humana Inc., our parent company, in the event of insolvency for (1) member coverage for which premium payment has been made prior to insolvency; (2) benefits for members then hospitalized until discharged; and (3) payment to providers for services rendered prior to insolvency. Our parent also has guaranteed the obligations of our military services subsidiaries.

In the ordinary course of business, we enter into contractual arrangements under which we may agree to indemnify a third party to such arrangement from any losses incurred relating to the services they perform on behalf of us, or for losses arising from certain events as defined within the particular contract, which may include, for example, litigation or claims relating to past performance. Such indemnification obligations may not be subject to maximum loss clauses. Historically, payments made related to these indemnifications have been immaterial.

## Government Contracts

Our Medicare products, which accounted for approximately 72% of our total premiums and services revenue for the year ended December 31, 2012, primarily consisted of products covered under the Medicare Advantage and Medicare Part D Prescription Drug Plan contracts with the federal government. These contracts are renewed generally for a calendar year term unless CMS notifies us of its decision not to renew by August 1 of the calendar year in which the contract would end, or we notify CMS of our decision not to renew by the first Monday in June of the calendar year in which the contract would end. All material contracts between Humana and CMS relating to our Medicare products have been renewed for 2013, and all of our product offerings filed with CMS for 2013 have been approved.

CMS uses a risk-adjustment model which apportions premiums paid to Medicare Advantage plans according to health severity. The risk-adjustment model pays more for enrollees with predictably higher costs. Under this model, rates paid to Medicare Advantage plans are based on actuarially determined bids, which include a process whereby our prospective payments are based on a comparison of our beneficiaries' risk scores, derived from medical diagnoses, to those enrolled in the government's original Medicare program. Under the risk-adjustment methodology, all Medicare Advantage plans must collect and submit the necessary diagnosis code information from hospital inpatient, hospital outpatient, and physician providers to CMS within prescribed deadlines. The CMS risk-adjustment model uses the diagnosis data to calculate the risk-adjusted premium payment to Medicare Advantage plans, which CMS adjusts for coding pattern differences between the health



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

plans and the government fee-for-service program. We generally rely on providers, including certain providers in our network who are our employees, to code their claim submissions with appropriate diagnoses, which we send to CMS as the basis for our payment received from CMS under the actuarial risk-adjustment model. We also rely on these providers to document appropriately all medical data, including the diagnosis data submitted with claims.

CMS is continuing to perform audits of various companies’ selected Medicare Advantage contracts related to this risk adjustment diagnosis data. We refer to these audits as Risk-Adjustment Data Validation Audits, or RADV audits. RADV audits review medical records in an attempt to validate provider medical record documentation and coding practices which influence the calculation of premium payments to Medicare Advantage plans.

On February 24, 2012, CMS released a “Notice of Final Payment Error Calculation Methodology for Part C Medicare Advantage Risk Adjustment Data Validation (RADV) Contract-Level Audits.” The payment error calculation methodology provides that, in calculating the economic impact of audit results for a Medicare Advantage contract, if any, the results of the audit sample will be extrapolated to the entire Medicare Advantage contract based upon a comparison to “benchmark” audit data in the government fee-for-service program. This comparison to the government program benchmark audit is necessary to determine the economic impact, if any, of audit results because the government program data set, including any attendant errors that are present in that data set, provides the basis for Medicare Advantage plans risk adjustment to payment rates. CMS already makes other adjustments to payment rates based on a comparison of coding pattern differences between Medicare Advantage plans and the government fee-for-service program data (such as for frequency of coding for certain diagnoses in Medicare Advantage plan data versus the government program data set).

The final methodology, including the first application of extrapolated audit results to determine audit settlements, is expected to be applied to the next round of RADV contract level audits to be conducted on 2011 premium payments. Selected Medicare Advantage contracts will be notified of an audit at some point after the close of the final reconciliation for the payment year being audited. The final reconciliation occurs in August of the calendar year following the payment year.

Estimated audit settlements are recorded as a reduction of premiums revenue in our consolidated statements of income, based upon available information. During 2012, we completed internal contract level audits of certain contracts based on the RADV audit methodology prescribed by CMS. Included in these internal contract level audits was an audit of our Private Fee-For-Service business which we used to represent a proxy of the benchmark audit data in the government fee-for-service program which has not yet been released. We based our accrual of estimated audit settlements for contract years 2011 (the first year that application of extrapolated audit results is applicable) and 2012 on the results of these internal contract level audits. Estimates derived from these results were not material to our results of operations, financial position, or cash flows. However, as indicated, we are awaiting additional guidance from CMS regarding the benchmark audit data in the government fee-for-service program and the identification of our specific Medicare Advantage contracts that will be selected for audit. Accordingly, we cannot determine whether such audits will have a material adverse effect on our results of operations, financial position, or cash flows.

At December 31, 2012, our military services business, which accounted for approximately 3% of our total premiums and services revenue for the year ended December 31, 2012, primarily consisted of the TRICARE South Region contract. On April 1, 2012, we began delivering services under the new TRICARE South Region contract that the Department of Defense TRICARE Management Activity, or TMA, awarded to us on February 25, 2011. The new 5-year South Region contract, which expires March 31, 2017, is subject to annual renewals on April 1 of each year during its term at the government's option. The TMA has notified us of its intent to exercise its option to extend the TRICARE South Region contract through March 31, 2014.



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

Our Medicaid business, which accounted for approximately 3% of our total premiums and services revenue for the year ended December 31, 2012, primarily consists of contracts in Puerto Rico and Florida, with the vast majority in Puerto Rico. Effective October 1, 2010, as amended in May 2011, the Puerto Rico Health Insurance Administration, or PRHIA, awarded us contracts for the East, Southeast, and Southwest regions for a three-year term through June 30, 2013.

The loss of any of the contracts above or significant changes in these programs as a result of legislative action, including reductions in premium payments to us, or increases in member benefits without corresponding increases in premium payments to us, may have a material adverse effect on our results of operations, financial position, and cash flows.

## Legal Proceedings and Certain Regulatory Matters

## Florida Matters

On December 16, 2010, an individual filed a qui tam suit captioned United States of America ex rel. Marc Osheroff v. Humana et al. in the Southern District of Florida, against us, several of our health plan subsidiaries, and certain other companies that operate medical centers in Miami-Dade County, Florida. After the U.S. government declined to intervene, the Court ordered the complaint unsealed, and the individual plaintiff amended his complaint and served the Company on December 8, 2011. The amended complaint alleges certain civil violations by our CAC Medical Centers in Florida, including offering various amenities such as transportation and meals, to Medicare and dual eligible individuals in our community center settings. The amended complaint also alleges civil violations by our Medicare Advantage health plans in Florida, arising from the alleged activities of our CAC Medical Centers and the codefendants in the complaint. The amended complaint seeks damages and penalties on behalf of the United States under the Anti-Inducement and Anti-Kickback Statutes and the False Claims Act. On September 28, 2012, the Court dismissed, with prejudice, all causes of action that were asserted in the suit. On January 31, 2013, the Court denied a motion for reconsideration filed by the individual plaintiff. We expect the individual plaintiff to appeal the Court’s ruling.

On January 6, 2012, the Civil Division of the United States Attorney’s Office for the Southern District of Florida advised our legal counsel that it is seeking documents and information from us and several of our affiliates relating to several matters including the coding of medical claims by one or more South Florida medical providers, and loans to physician practices.

## Other Lawsuits and Regulatory Matters

Our current and past business practices are subject to review or other investigations by various state insurance and health care regulatory authorities and other state and federal regulatory authorities. These authorities regularly scrutinize the business practices of health insurance and benefits companies. These reviews focus on numerous facets of our business, including claims payment practices, provider contracting, competitive practices, commission payments, privacy issues, utilization management practices, and sales practices, among others. Some of these reviews have historically resulted in fines imposed on us and some have required changes to some of our practices. We continue to be subject to these reviews, which could result in additional fines or other sanctions being imposed on us or additional changes in some of our practices.

We also are involved in various other lawsuits that arise, for the most part, in the ordinary course of our business operations, certain of which may be styled as class-action lawsuits. Among other matters, this litigation may include employment matters, claims of medical malpractice, bad faith, nonacceptance or termination of providers, anticompetitive practices, improper rate setting, failure to disclose network discounts and various other



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

provider arrangements, general contractual matters, intellectual property matters, and challenges to subrogation practices. Under state guaranty assessment laws, we may be assessed (up to prescribed limits) for certain obligations to the policyholders and claimants of insolvent insurance companies that write the same line or lines of business as we do. As a government contractor, we may also be subject to qui tam litigation brought by individuals who seek to sue on behalf of the government, alleging that the government contractor submitted false claims to the government including, among other allegations, resulting from coding and review practices under the Medicare risk-adjustment model. Qui tam litigation is filed under seal to allow the government an opportunity to investigate and to decide if it wishes to intervene and assume control of the litigation. If the government does not intervene, the lawsuit is unsealed, and the individual may continue to prosecute the action on his or her own. We also are subject to allegations of non-performance of contractual obligations to providers, members, and others, including failure to properly pay claims, improper policy terminations, challenges to our implementation of the Medicare Part D prescription drug program and other litigation.

Personal injury claims and claims for extracontractual damages arising from medical benefit denials are covered by insurance from our wholly owned captive insurance subsidiary and excess carriers, except to the extent that claimants seek punitive damages, which may not be covered by insurance in certain states in which insurance coverage for punitive damages is not permitted. In addition, insurance coverage for all or certain forms of liability has become increasingly costly and may become unavailable or prohibitively expensive in the future.

We record accruals for such contingencies to the extent that we conclude it is probable that a liability has been incurred and the amount of the loss can be reasonably estimated. No estimate of the possible loss or range of loss in excess of amounts accrued, if any, can be made at this time regarding the matters specifically described above because of the inherently unpredictable nature of legal proceedings, which also may be exacerbated by various factors, including: (i) the damages sought in the proceedings are unsubstantiated or indeterminate; (ii) discovery is not complete; (iii) the proceeding is in its early stages; (iv) the matters present legal uncertainties; (v) there are significant facts in dispute; (vi) there are a large number of parties (including where it is uncertain how liability, if any, will be shared among multiple defendants); or (vii) there is a wide range of potential outcomes.

The outcome of any current or future litigation or governmental or internal investigations, including the matters described above, cannot be accurately predicted, nor can we predict any resulting penalties, fines or other sanctions that may be imposed at the discretion of federal or state regulatory authorities. Nevertheless, it is reasonably possible that any such outcome of litigation, penalties, fines or other sanctions could be substantial, and the outcome of these matters may have a material adverse effect on our results of operations, financial position, and cash flows, and may also affect our reputation.

## 16. SEGMENT INFORMATION

We manage our business with three reportable segments: Retail, Employer Group, and Health and Well-Being Services. In addition, the Other Businesses category includes businesses that are not individually reportable because they do not meet the quantitative thresholds required by generally accepted accounting principles. These segments are based on a combination of the type of health plan customer and adjacent businesses centered on well-being solutions for our health plans and other customers, as described below. These segment groupings are consistent with information used by our Chief Executive Officer to assess performance and allocate resources.

The Retail segment consists of Medicare and commercial fully-insured medical and specialty health insurance benefits, including dental, vision, and other supplemental health and financial protection products, marketed directly to individuals. The Employer Group segment consists of Medicare and commercial fully-insured medical and specialty health insurance benefits, including dental, vision, and other supplemental health and financial protection products, marketed directly to individuals.



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

insured medical and specialty health insurance benefits, including dental, vision, and other supplemental health and financial protection products, as well as administrative services only products marketed to employer groups. The Health and Well-Being Services segment includes services offered to our health plan members as well as to third parties that promote health and wellness, including provider services, pharmacy, integrated wellness, and home care services. The Other Businesses category consists of our military services, primarily our TRICARE South Region contract, Medicaid, and closed-block long-term care businesses as well as our contract with CMS to administer the LI-NET program.

Our Health and Well-Being Services intersegment revenues primarily relate to managing prescription drug coverage for members of our other segments through Humana Pharmacy Solutions \( ^{®} \) , or HPS, and includes the operations of RightSourceRx \( ^{®} \) , our mail order pharmacy business. These revenues consist of the prescription price (ingredient cost plus dispensing fee), including the portion to be settled with the member (co-share) or with the government (subsidies), plus any associated administrative fees. Services revenues related to the distribution of prescriptions by third party retail pharmacies in our networks are recognized when the claim is processed and product revenues from dispensing prescriptions from our mail order pharmacies are recorded when the prescription or product is shipped. Our pharmacy operations, which are responsible for designing pharmacy benefits, including defining member co-share responsibilities, determining formulary listings, selecting and establishing prices charged by retail pharmacies, confirming member eligibility, reviewing drug utilization, and processing claims, act as a principal in the arrangement on behalf of members in our other segments. As principal, our Health and Well-Being Services segment reports pharmacy related revenues on a gross basis, including co-share amounts from members collected by third party retail pharmacies at the point of service.

In addition, our Health and Well-Being Services intersegment revenues include revenues earned by certain owned providers derived from risk-based managed care agreements with our health plans. Under these agreements, the provider receives a monthly capitated fee that varies depending on the demographics and health status of the member, for each member assigned to these owned providers by our health plans. The owned provider assumes the economic risk of funding the assigned members' healthcare services and related administrative costs. Accordingly, our Health and Well-Being Services segment reports provider services related revenues on a gross basis. Capitation fee revenue is recognized in the period in which the assigned members are entitled to receive healthcare services.

We present our consolidated results of operations from the perspective of the health plans. As a result, the cost of providing benefits to our members, whether provided via a third party provider or internally through a stand-alone subsidiary, is classified as benefits expense and excludes the portion of the cost for which the health plans do not bear responsibility, including member co-share amounts and government subsidies of $4.7 billion in 2012, $4.2 billion in 2011, and $3.5 billion in 2010. In addition, depreciation and amortization expense associated with certain businesses in our Health and Well-Being Services segment delivering benefits to our members, primarily associated with our pharmacy operations, are included with benefits expense. The amount of this expense was $43 million in 2012, $33 million in 2011, and $18 million in 2010.

Other than those described previously, the accounting policies of each segment are the same and are described in Note 2. Transactions between reportable segments consist of sales of services rendered by our Health and Well-Being Services segment, primarily pharmacy, behavioral health, and provider services, to our Retail and Employer Group customers. Intersegment sales and expenses are recorded at fair value and eliminated in consolidation. Members served by our segments often utilize the same provider networks, enabling us in some instances to obtain more favorable contract terms with providers. Our segments also share indirect costs and assets. As a result, the profitability of each segment is interdependent. We allocate most operating expenses to our segments. Assets and certain corporate income and expenses are not allocated to the segments, including the



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

portion of investment income not supporting segment operations, interest expense on corporate debt, and certain other corporate expenses. These items are managed at a corporate level. These corporate amounts are reported separately from our reportable segments and included with intersegment eliminations in the tables presenting segment results below.

Our segment results were as follows for the years ended December 31, 2012, 2011, and 2010:

<table><tr><td></td><td>Retail</td><td>Employer Group</td><td>Health and Well-Being Services</td><td>Other Businesses</td><td>Eliminations/Corporate</td><td>Consolidated</td></tr><tr><td></td><td></td><td></td><td></td><td>(in millions)</td><td></td><td></td></tr><tr><td>2012</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Revenues—external customers</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Premiums:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Medicare Advantage</td><td>$20,788</td><td>$ 4,064</td><td>$ 0</td><td>$ 0</td><td>$ 0</td><td>$24,852</td></tr><tr><td>Medicare stand-alone PDP</td><td>2,587</td><td>8</td><td>0</td><td>266</td><td>0</td><td>2,861</td></tr><tr><td>Total Medicare</td><td>23,375</td><td>4,072</td><td>0</td><td>266</td><td>0</td><td>27,713</td></tr><tr><td>Fully-insured</td><td>1,004</td><td>4,996</td><td>0</td><td>0</td><td>0</td><td>6,000</td></tr><tr><td>Specialty</td><td>171</td><td>1,070</td><td>0</td><td>0</td><td>0</td><td>1,241</td></tr><tr><td>Military services</td><td>0</td><td>0</td><td>0</td><td>1,017</td><td>0</td><td>1,017</td></tr><tr><td>Medicaid and other</td><td>0</td><td>0</td><td>0</td><td>1,038</td><td>0</td><td>1,038</td></tr><tr><td>Total premiums</td><td>24,550</td><td>10,138</td><td>0</td><td>2,321</td><td>0</td><td>37,009</td></tr><tr><td>Services revenue:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Provider</td><td>0</td><td>0</td><td>1,020</td><td>0</td><td>0</td><td>1,020</td></tr><tr><td>ASO and other</td><td>24</td><td>358</td><td>0</td><td>308</td><td>0</td><td>690</td></tr><tr><td>Pharmacy</td><td>0</td><td>0</td><td>16</td><td>0</td><td>0</td><td>16</td></tr><tr><td>Total services revenue</td><td>24</td><td>358</td><td>1,036</td><td>308</td><td>0</td><td>1,726</td></tr><tr><td>Total revenues—external customers</td><td>24,574</td><td>10,496</td><td>1,036</td><td>2,629</td><td>0</td><td>38,735</td></tr><tr><td>Intersegment revenues</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Services</td><td>2</td><td>15</td><td>9,610</td><td>0</td><td>(9,627)</td><td>0</td></tr><tr><td>Products</td><td>0</td><td>0</td><td>2,342</td><td>0</td><td>(2,342)</td><td>0</td></tr><tr><td>Total intersegment revenues</td><td>2</td><td>15</td><td>11,952</td><td>0</td><td>(11,969)</td><td>0</td></tr><tr><td>Investment income</td><td>79</td><td>42</td><td>0</td><td>58</td><td>212</td><td>391</td></tr><tr><td>Total revenues</td><td>24,655</td><td>10,553</td><td>12,988</td><td>2,687</td><td>(11,757)</td><td>39,126</td></tr><tr><td>Operating expenses:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Benefits</td><td>20,651</td><td>8,524</td><td>0</td><td>2,198</td><td>(388)</td><td>30,985</td></tr><tr><td>Operating costs</td><td>2,711</td><td>1,696</td><td>12,407</td><td>492</td><td>(11,476)</td><td>5,830</td></tr><tr><td>Depreciation and amortization</td><td>131</td><td>80</td><td>95</td><td>16</td><td>(27)</td><td>295</td></tr><tr><td>Total operating expenses</td><td>23,493</td><td>10,300</td><td>12,502</td><td>2,706</td><td>(11,891)</td><td>37,110</td></tr><tr><td>Income (loss) from operations</td><td>1,162</td><td>253</td><td>486</td><td>(19)</td><td>134</td><td>2,016</td></tr><tr><td>Interest expense</td><td>0</td><td>0</td><td>0</td><td>0</td><td>105</td><td>105</td></tr><tr><td>Income (loss) before income taxes</td><td>$ 1,162</td><td>$ 253</td><td>$ 486</td><td>$ (19)</td><td>$ 29</td><td>$ 1,911</td></tr></table>



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

Premium and services revenues derived from our contracts with the federal government, as a percentage of our total premium and services revenues, were approximately 75% for 2012, 76% for 2011, and 76% for 2010.

Benefits expense for our Other Businesses for 2012 includes expense of approximately $46 million for a litigation settlement associated with our Military services business.

<table><tr><td></td><td>Retail</td><td>Employer Group</td><td>Health and Well-Being Services</td><td>Other Businesses</td><td>Eliminations/ Corporate</td><td>Consolidated</td></tr><tr><td></td><td></td><td></td><td colspan="4">(in millions)</td></tr><tr><td>2011</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Revenues—external customers</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Premiums:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Medicare Advantage</td><td>$18,100</td><td>$3,152</td><td>$ 0</td><td>$ 0</td><td>$ 0</td><td>$21,252</td></tr><tr><td>Medicare stand-alone PDP</td><td>2,317</td><td>8</td><td>0</td><td>253</td><td>0</td><td>2,578</td></tr><tr><td>Total Medicare</td><td>20,417</td><td>3,160</td><td>0</td><td>253</td><td>0</td><td>23,830</td></tr><tr><td>Fully-insured</td><td>861</td><td>4,782</td><td>0</td><td>0</td><td>0</td><td>5,643</td></tr><tr><td>Specialty</td><td>124</td><td>935</td><td>0</td><td>0</td><td>0</td><td>1,059</td></tr><tr><td>Military services</td><td>0</td><td>0</td><td>0</td><td>3,616</td><td>0</td><td>3,616</td></tr><tr><td>Medicaid and other</td><td>0</td><td>0</td><td>0</td><td>958</td><td>0</td><td>958</td></tr><tr><td>Total premiums</td><td>21,402</td><td>8,877</td><td>0</td><td>4,827</td><td>0</td><td>35,106</td></tr><tr><td>Services revenue:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Provider</td><td>0</td><td>0</td><td>892</td><td>0</td><td>0</td><td>892</td></tr><tr><td>ASO and other</td><td>16</td><td>356</td><td>0</td><td>85</td><td>0</td><td>457</td></tr><tr><td>Pharmacy</td><td>0</td><td>0</td><td>11</td><td>0</td><td>0</td><td>11</td></tr><tr><td>Total services revenue</td><td>16</td><td>356</td><td>903</td><td>85</td><td>0</td><td>1,360</td></tr><tr><td>Total revenues—external customers</td><td>21,418</td><td>9,233</td><td>903</td><td>4,912</td><td>0</td><td>36,466</td></tr><tr><td>Intersegment revenues</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Services</td><td>0</td><td>14</td><td>8,510</td><td>0</td><td>(8,524)</td><td>0</td></tr><tr><td>Products</td><td>0</td><td>0</td><td>1,820</td><td>0</td><td>(1,820)</td><td>0</td></tr><tr><td>Total intersegment revenues</td><td>0</td><td>14</td><td>10,330</td><td>0</td><td>(10,344)</td><td>0</td></tr><tr><td>Investment income</td><td>76</td><td>48</td><td>0</td><td>54</td><td>188</td><td>366</td></tr><tr><td>Total revenues</td><td>21,494</td><td>9,295</td><td>11,233</td><td>4,966</td><td>(10,156)</td><td>36,832</td></tr><tr><td>Operating expenses:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Benefits</td><td>17,383</td><td>7,318</td><td>0</td><td>4,411</td><td>(289)</td><td>28,823</td></tr><tr><td>Operating costs</td><td>2,405</td><td>1,650</td><td>10,798</td><td>461</td><td>(9,919)</td><td>5,395</td></tr><tr><td>Depreciation and amortization</td><td>119</td><td>85</td><td>82</td><td>10</td><td>(26)</td><td>270</td></tr><tr><td>Total operating expenses</td><td>19,907</td><td>9,053</td><td>10,880</td><td>4,882</td><td>(10,234)</td><td>34,488</td></tr><tr><td>Income from operations</td><td>1,587</td><td>242</td><td>353</td><td>84</td><td>78</td><td>2,344</td></tr><tr><td>Interest expense</td><td>0</td><td>0</td><td>0</td><td>0</td><td>109</td><td>109</td></tr><tr><td>Income (loss) before income taxes</td><td>$ 1,587</td><td>$ 242</td><td>$ 353</td><td>$ 84</td><td>$ (31)</td><td>$ 2,235</td></tr></table>



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

<table><tr><td></td><td>Retail</td><td>Employer Group</td><td>Health and Well-Being Services</td><td>Other Businesses</td><td>Eliminations/ Corporate</td><td>Consolidated</td></tr><tr><td></td><td></td><td></td><td colspan="4">(in millions)</td></tr><tr><td>2010</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Revenues—external customers</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Premiums:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Medicare Advantage</td><td>$16,265</td><td>$3,021</td><td>$ 0</td><td>$ 0</td><td>$ 0</td><td>$19,286</td></tr><tr><td>Medicare stand-alone PDP</td><td>1,959</td><td>5</td><td>0</td><td>355</td><td>0</td><td>2,319</td></tr><tr><td>Total Medicare</td><td>18,224</td><td>3,026</td><td>0</td><td>355</td><td>0</td><td>21,605</td></tr><tr><td>Fully-insured</td><td>746</td><td>5,169</td><td>0</td><td>0</td><td>0</td><td>5,915</td></tr><tr><td>Specialty</td><td>82</td><td>885</td><td>0</td><td>0</td><td>0</td><td>967</td></tr><tr><td>Military services</td><td>0</td><td>0</td><td>0</td><td>3,462</td><td>0</td><td>3,462</td></tr><tr><td>Medicaid and other</td><td>0</td><td>0</td><td>0</td><td>763</td><td>0</td><td>763</td></tr><tr><td>Total premiums</td><td>19,052</td><td>9,080</td><td>0</td><td>4,580</td><td>0</td><td>32,712</td></tr><tr><td>Services revenue:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Provider</td><td>0</td><td>0</td><td>34</td><td>0</td><td>0</td><td>34</td></tr><tr><td>ASO and other</td><td>11</td><td>395</td><td>0</td><td>115</td><td>0</td><td>521</td></tr><tr><td>Pharmacy</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td></tr><tr><td>Total services revenue</td><td>11</td><td>395</td><td>34</td><td>115</td><td>0</td><td>555</td></tr><tr><td>Total revenues—external customers</td><td>19,063</td><td>9,475</td><td>34</td><td>4,695</td><td>0</td><td>33,267</td></tr><tr><td>Intersegment revenues</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Services</td><td>0</td><td>12</td><td>7,494</td><td>0</td><td>(7,506)</td><td>0</td></tr><tr><td>Products</td><td>0</td><td>0</td><td>1,292</td><td>0</td><td>(1,292)</td><td>0</td></tr><tr><td>Total intersegment revenues</td><td>0</td><td>12</td><td>8,786</td><td>0</td><td>(8,798)</td><td>0</td></tr><tr><td>Investment income</td><td>80</td><td>42</td><td>0</td><td>43</td><td>164</td><td>329</td></tr><tr><td>Total revenues</td><td>19,143</td><td>9,529</td><td>8,820</td><td>4,738</td><td>(8,634)</td><td>33,596</td></tr><tr><td>Operating expenses:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Benefits</td><td>15,624</td><td>7,486</td><td>0</td><td>4,253</td><td>(246)</td><td>27,117</td></tr><tr><td>Operating costs</td><td>2,113</td><td>1,662</td><td>8,575</td><td>475</td><td>(8,445)</td><td>4,380</td></tr><tr><td>Depreciation and amortization</td><td>117</td><td>93</td><td>26</td><td>12</td><td>(3)</td><td>245</td></tr><tr><td>Total operating expenses</td><td>17,854</td><td>9,241</td><td>8,601</td><td>4,740</td><td>(8,694)</td><td>31,742</td></tr><tr><td>Income (loss) from operations</td><td>1,289</td><td>288</td><td>219</td><td>(2)</td><td>60</td><td>1,854</td></tr><tr><td>Interest expense</td><td>0</td><td>0</td><td>0</td><td>0</td><td>105</td><td>105</td></tr><tr><td>Income (loss) before income taxes</td><td>$ 1,289</td><td>$ 288</td><td>$ 219</td><td>$ (2)</td><td>$ (45)</td><td>$ 1,749</td></tr></table>

Retail segment operating costs for 2010 include $147 million for the write-down of deferred acquisition costs associated with our individual commercial medical policies as discussed more fully in Note 17.

Benefits expense for Other Businesses for 2010 includes $139 million for reserve strengthening associated with our closed block of long-term care policies as discussed more fully in Note 17.



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

## 17. EXPENSES ASSOCIATED WITH LONG-DURATION INSURANCE PRODUCTS

Premiums associated with our long-duration insurance products accounted for approximately 2% of our consolidated premiums and services revenue for the year ended December 31, 2012. We use long-duration accounting for products such as long-term care, life insurance, annuities, and certain health and other supplemental policies sold to individuals because they are expected to remain in force for an extended period beyond one year and because premium received in the earlier years is intended to pay anticipated benefits to be incurred in future years. As a result, we defer policy acquisition costs, primarily consisting of commissions, and amortize them over the estimated life of the policies in proportion to premiums earned.

In addition, we establish reserves for future policy benefits in recognition of the fact that some of the premium received in the earlier years is intended to pay anticipated benefits to be incurred in future years. These reserves are recognized on a net level premium method based on interest rates, mortality, morbidity, withdrawal and maintenance expense assumptions from published actuarial tables, modified based upon actual experience. The assumptions used to determine the liability for future policy benefits are established and locked in at the time each contract is acquired and would only change if our expected future experience deteriorated to the point that the level of the liability, together with the present value of future gross premiums, are not adequate to provide for future expected policy benefits. Long-term care policies provide for long-duration coverage and, therefore, our actual claims experience will emerge many years after assumptions have been established. The risk of a deviation of the actual interest rates, morbidity rates, and mortality rates from those assumed in our reserves are particularly significant to our closed block of long-term care policies. We monitor the loss experience of these long-term care policies and, when necessary, apply for premium rate increases through a regulatory filing and approval process in the jurisdictions in which such products were sold. To the extent premium rate increases and/or loss experience vary from our acquisition date assumptions, future adjustments to reserves could be required.

The table below presents deferred acquisition costs and future policy benefits payable associated with our long-duration insurance products for the years ended December 31, 2012 and 2011.

<table><tr><td rowspan="2"></td><td colspan="2">2012</td><td colspan="2">2011</td></tr><tr><td>Deferred acquisition costs</td><td>Future policy benefits payable</td><td>Deferred acquisition costs</td><td>Future policy benefits payable</td></tr><tr><td></td><td colspan="4">(in millions)</td></tr><tr><td>Other long-term assets</td><td>$149</td><td>$ 0</td><td>$114</td><td>$ 0</td></tr><tr><td>Trade accounts payable and accrued expenses</td><td>0</td><td>(63)</td><td>0</td><td>(58)</td></tr><tr><td>Long-term liabilities</td><td>0</td><td>(1,858)</td><td>0</td><td>(1,663)</td></tr><tr><td>Total asset (liability)</td><td>$149</td><td>$(1,921)</td><td>$114</td><td>$(1,721)</td></tr></table>

In addition, future policy benefits payable include amounts of $220 million at December 31, 2012 and $224 million at December 31, 2011 which are subject to 100% coinsurance agreements as more fully described in Note 18.

Benefits expense associated with future policy benefits payable was $136 million in 2012, $114 million in 2011, and $266 million in 2010. Benefits expense for 2012 and 2010 included net charges of $29 million and $139 million, respectively, associated with our long-term care policies discussed further below. Amortization of deferred acquisition costs included in operating costs was $44 million in 2012, $34 million in 2011, and $198 million in 2010. Amortization expense for 2010 included a write-down of deferred acquisition costs of $147 million discussed further below.



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

Future policy benefits payable include $1.1 billion at December 31, 2012 and $938 million at December 31, 2011 associated with a closed block of long-term care policies acquired in connection with the November 30, 2007 acquisition of KMG. These amounts include $119 million at December 31, 2012 and $47 million at December 31, 2011 associated with amounts charged to accumulated other comprehensive income for an additional liability that would exist on our closed-block of long-term care policies if unrealized gains on the sale of the investments backing such products had been realized and the proceeds reinvested at then current yields. Amounts charged to accumulated other comprehensive income are net of applicable deferred taxes.

During 2012, we recorded a change in estimate associated with future policy benefits payable for our long-term care block resulting in additional benefits expense of $29 million and a corresponding increase in future policy benefits payable. This change in estimate was based on current claim experience demonstrating an increase in the length of the time policyholders already in payment status remained in such status. Future policy benefits payable was increased to cover future payments to policyholders currently in payment status. During 2010, certain states approved premium rate increases for a large portion of our long-term care block that were significantly below our acquisition date assumptions. Based on these actions by the states, combined with lower interest rates and higher actual expenses as compared to acquisition date assumptions, we determined that our existing future policy benefits payable, together with the present value of future gross premiums, associated with our long-term care policies were not adequate to provide for future policy benefits under these policies; therefore we unlocked and modified our assumptions based on current expectations. Accordingly, during 2010 we recorded $139 million of additional benefits expense, with a corresponding increase in future policy benefits payable of $170 million partially offset by a related reinsurance recoverable of $31 million included in other long-term assets.

Deferred acquisition costs included $62 million and $54 million associated with our individual commercial medical policies at December 31, 2012 and December 31, 2011, respectively. Future policy benefits payable associated with our individual commercial medical policies were $282 million at December 31, 2012 and $233 million at December 31, 2011. In light of the Health Insurance Reform Legislation, including mandating that 80% of premiums revenue be expended on medical costs for individual commercial medical policies beginning in 2011, we completed a deferred acquisition cost recoverability analysis for our individual commercial medical policies during 2010. Our recoverability test indicated that a substantial portion of unamortized deferred acquisition costs associated with the individual commercial medical block of business were not recoverable from future income. As a result, during 2010 we recorded a write-down of deferred acquisition costs of $147 million with a corresponding charge to operating costs.

## 18. REINSURANCE

Certain blocks of insurance assumed in acquisitions, primarily life, long-term care, and annuities in run-off status, are subject to reinsurance where some or all of the underwriting risk related to these policies has been ceded to a third party. In addition, a large portion of our reinsurance takes the form of 100% coinsurance agreements where, in addition to all of the underwriting risk, all administrative responsibilities, including premium collections and claim payment, have also been ceded to a third party. We acquired these policies and related reinsurance agreements with the purchase of stock of companies in which the policies were originally written. We acquired these companies for business reasons unrelated to these particular policies, including the companies' other products and licenses necessary to fulfill strategic plans.

A reinsurance agreement between two entities transfers the underwriting risk of policyholder liabilities to a reinsurer while the primary insurer retains the contractual relationship with the ultimate insured. As such, these reinsurance agreements do not completely relieve us of our potential liability to the ultimate insured. However, given the transfer of underwriting risk, our potential liability is limited to the credit exposure which exists should the reinsurer be unable to meet its obligations assumed under these reinsurance agreements.



## Humana Inc.

## NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)

Reinsurance recoverables represent the portion of future policy benefits payable that are covered by reinsurance. Amounts recoverable from reinsurers are estimated in a manner consistent with the methods used to determine future policy benefits payable as detailed in Note 2. Reinsurance recoverables, included in other long-term assets, were $461 million at December 31, 2012 and $436 million at December 31, 2011. The percentage of these reinsurance recoverables resulting from 100% coinsurance agreements was approximately 48% at December 31, 2012 and approximately 51% at December 31, 2011. Premiums ceded were $34 million in each of 2012, 2011, and 2010.

We evaluate the financial condition of these reinsurers on a regular basis. These reinsurers are well-known and well-established, as evidenced by the strong financial ratings at December 31, 2012 presented below:

<table><tr><td>Reinsurer</td><td>Total Recoverable (in millions)</td><td>A.M. Best Rating at December 31, 2012</td></tr><tr><td>Protective Life Insurance Company</td><td>$196</td><td>A+ (superior)</td></tr><tr><td>Munich American Reassurance Company</td><td>78</td><td>A+ (superior)</td></tr><tr><td>Employers Reassurance Corporation</td><td>64</td><td>A- (excellent)</td></tr><tr><td>General Re Life Corporation</td><td>64</td><td>A++ (superior)</td></tr><tr><td>All others</td><td>59</td><td>A+ to B++ (superior to good)</td></tr><tr><td></td><td>$461</td><td></td></tr></table>

The all other category represents 15 reinsurers with individual balances less than $20 million. Two of these reinsurers have placed $24 million of cash and securities in trusts, an amount at least equal to the recoverable from the reinsurer.



# REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Stockholders of Humana Inc.:

In our opinion, the accompanying consolidated balance sheets and the related consolidated statements of income, of comprehensive income, of stockholders' equity and of cash flows, present fairly, in all material respects, the financial position of Humana Inc. and its subsidiaries ("Company") at December 31, 2012 and 2011, and the results of their operations and their cash flows for each of the three years in the period ended December 31, 2012 in conformity with accounting principles generally accepted in the United States of America. In addition, in our opinion, the financial statement schedules appearing under Item 15(a)(2) present fairly, in all material respects, the information set forth therein when read in conjunction with the related consolidated financial statements. Also in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2012, based on criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). The Company's management is responsible for these financial statements and financial statement schedules, for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in Management's Report on Internal Control Over Financial Reporting appearing under Item 9A. Our responsibility is to express opinions on these financial statements, on the financial statement schedules, and on the Company's internal control over financial reporting based on our integrated audits. We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the financial statements are free of material misstatement and whether effective internal control over financial reporting was maintained in all material respects. Our audits of the financial statements included examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

As described in Management’s Report on Internal Control Over Financial Reporting appearing under Item 9A, management has excluded Metropolitan Health Networks, Inc. (“Metropolitan”) from its assessment of internal control over financial reporting as of December 31, 2012 because it was acquired by the Company in a purchase business combination during 2012. We have also excluded Metropolitan from our audit of internal control over financial reporting. Metropolitan is a wholly-owned subsidiary whose total assets and total revenues represent approximately 5% and less than 0.1%, respectively, of the related consolidated financial statement amounts as of and for the year ended December 31, 2012.

/s/ PricewaterhouseCoopers LLP

Louisville, Kentucky

February 21, 2013



## Humana Inc.
QUARTERLY FINANCIAL INFORMATION
(Unaudited)

A summary of our quarterly unaudited results of operations for the years ended December 31, 2012 and 2011 follows:

<table><tr><td rowspan="3"></td><td colspan="4">2012</td></tr><tr><td>First</td><td>Second (1)</td><td>Third</td><td>Fourth</td></tr><tr><td colspan="4">(in millions, except per share results)</td></tr><tr><td>Total revenues</td><td>$10,219</td><td>$9,699</td><td>$9,651</td><td>$9,557</td></tr><tr><td>Income before income taxes</td><td>390</td><td>564</td><td>675</td><td>282</td></tr><tr><td>Net income</td><td>248</td><td>356</td><td>426</td><td>192</td></tr><tr><td>Basic earnings per common share</td><td>1.51</td><td>2.19</td><td>2.65</td><td>1.21</td></tr><tr><td>Diluted earnings per common share</td><td>1.49</td><td>2.16</td><td>2.62</td><td>1.19</td></tr></table>

<table><tr><td rowspan="3"></td><td colspan="4">2011</td></tr><tr><td>First</td><td>Second</td><td>Third</td><td>Fourth</td></tr><tr><td colspan="4">(in millions, except per share results)</td></tr><tr><td>Total revenues</td><td>$9,191</td><td>$9,284</td><td>$9,301</td><td>$9,056</td></tr><tr><td>Income before income taxes</td><td>497</td><td>726</td><td>699</td><td>313</td></tr><tr><td>Net income</td><td>315</td><td>460</td><td>445</td><td>199</td></tr><tr><td>Basic earnings per common share</td><td>1.88</td><td>2.76</td><td>2.71</td><td>1.22</td></tr><tr><td>Diluted earnings per common share</td><td>1.86</td><td>2.71</td><td>2.67</td><td>1.20</td></tr></table>

(1) Includes an expense of $46 million ($29 million after tax, or $0.18 per diluted common share) for a litigation settlement associated with our military services business.



## ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE

Not applicable.

## ITEM 9A. CONTROLS AND PROCEDURES

## Management’s Responsibility for Financial Statements and Other Information

We are responsible for the preparation and integrity of the consolidated financial statements appearing in our Annual Report. The consolidated financial statements were prepared in conformity with accounting principles generally accepted in the United States and include amounts based on our estimates and judgments. All other financial information in this report has been presented on a basis consistent with the information included in the financial statements.

Our control environment is the foundation for our system of internal control over financial reporting and is embodied in our Business Ethics Policy. It sets the tone of our organization and includes factors such as integrity and ethical values. Our internal control over financial reporting is supported by formal policies and procedures which are reviewed, modified and improved as changes occur in business conditions and operations.

The Audit Committee of the Board of Directors, which is composed solely of independent outside directors, meets periodically with members of management, the internal auditors and our independent registered public accounting firm to review and discuss internal controls over financial reporting and accounting and financial reporting matters. Our independent registered public accounting firm and internal auditors report to the Audit Committee and accordingly have full and free access to the Audit Committee at any time.

## Evaluation of Disclosure Controls and Procedures

We have established disclosure controls and procedures to ensure that material information relating to the Company, including its consolidated subsidiaries, is made known to members of senior management and the Board of Directors.

Based on our evaluation as of December 31, 2012, we as the principal executive officer, the principal financial officer and the principal accounting officer of the Company have concluded that the Company’s disclosure controls and procedures (as defined in the Securities Exchange Act of 1934) are effective to ensure that the information required to be disclosed by the Company in the reports that it files or submits under the Securities Exchange Act of 1934 is recorded, processed, summarized and reported as specified in Securities and Exchange Commission rules and forms.

## Management’s Report on Internal Control Over Financial Reporting

We are responsible for establishing and maintaining effective internal control over financial reporting as defined in Rule 13a-15(f) under the Securities Exchange Act of 1934. The Company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.



Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate or that the degree of compliance with the policies or procedures may deteriorate.

We assessed the effectiveness of the Company’s internal control over financial reporting as of December 31, 2012. In making this assessment, we used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission (COSO) in Internal Control – Integrated Framework. Based on our assessment, we determined that, as of December 31, 2012, the Company’s internal control over financial reporting was effective based on those criteria.

In conducting management’s evaluation as described above, Metropolitan Health Networks, Inc., or Metropolitan, acquired by us on December 21, 2012, was excluded. We are currently assessing the control environment and we plan to complete our evaluation of Metropolitan’s internal control over financial reporting by the first anniversary of the acquisition as required by the Securities and Exchange Commission’s rules. The operations of Metropolitan, which are included in the 2012 consolidated financial statements of the Company from its date of acquisition, constituted less than 0.1% of revenues and income before income taxes for the year ended December 31, 2012, and approximately 5% of total assets as of December 31, 2012.

The effectiveness of our internal control over financial reporting as of December 31, 2012 has been audited by PricewaterhouseCoopers LLP, our independent registered public accounting firm, who also audited the Company’s consolidated financial statements included in our Annual Report on Form 10-K, as stated in their report which appears on page 129.

## Changes in Internal Control over Financial Reporting

There have been no changes in the Company’s internal control over financial reporting during the quarter ended December 31, 2012 that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

Bruce D. Broussard

President and Chief Executive Officer

James H. Bloem

Senior Vice President, Chief Financial Officer and Treasurer

Steven E. McCulley

Vice President and Controller, Principal Accounting Officer

## ITEM 9B. OTHER INFORMATION

None.



## PART III

## ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE

## Directors

The information required by this Item is herein incorporated by reference from our Proxy Statement for the Annual Meeting of Stockholders scheduled to be held on April 25, 2013 appearing under the caption “Proposal One: Election of Directors” in such Proxy Statement.

## Executive Officers of the Registrant

Set forth below are names and ages of all of our current executive officers as of February 1, 2013, their positions, and the date first elected an officer:

<table><tr><td>Name</td><td>Age</td><td>Position</td><td>First Elected Officer</td></tr><tr><td>Bruce D. Broussard</td><td>50</td><td>President and Chief Executive Officer, Director</td><td>12/11(1)</td></tr><tr><td>James E. Murray</td><td>59</td><td>Executive Vice President and Chief Operating Officer</td><td>08/90(2)</td></tr><tr><td>James H. Bloem</td><td>62</td><td>Senior Vice President, Chief Financial Officer and Treasurer</td><td>02/01(3)</td></tr><tr><td>Elizabeth D. Bierbower</td><td>54</td><td>President, Employer Group Segment</td><td>05/12(4)</td></tr><tr><td>Timothy S. Huval</td><td>46</td><td>Senior Vice President and Chief Human Resources Officer</td><td>12/12(5)</td></tr><tr><td>Paul B. Kusserow</td><td>51</td><td>Senior Vice President and Chief Strategy and Corporate Development Officer</td><td>02/09(6)</td></tr><tr><td>Brian P. LeClaire</td><td>52</td><td>Senior Vice President and Chief Service and Information Officer</td><td>08/11(7)</td></tr><tr><td>Thomas J. Liston</td><td>51</td><td>President - Retail Segment</td><td>01/97(8)</td></tr><tr><td>Heidi S. Margulis</td><td>59</td><td>Senior Vice President - Public Affairs</td><td>12/95(9)</td></tr><tr><td>Tim S. McClain</td><td>64</td><td>President, Government and Other Businesses</td><td>02/12(10)</td></tr><tr><td>Bruce D. Perkins</td><td>58</td><td>President, Health and Well-Being Services Segment</td><td>05/12(11)</td></tr><tr><td>Christopher M. Todoroff</td><td>50</td><td>Senior Vice President and General Counsel</td><td>08/08(12)</td></tr><tr><td>Steven E. McCulley</td><td>51</td><td>Vice President and Controller (Principal Accounting Officer)</td><td>08/04(13)</td></tr></table>

(1) Mr. Broussard currently serves as Director, President and Chief Executive Officer, having held these positions since January 1, 2013. Mr. Broussard was elected President upon joining the Company in December 2011 and served in that capacity through December 2012. Prior to joining the Company, Mr. Broussard was Chief Executive Officer of McKesson Specialty/US Oncology, Inc. US Oncology was purchased by McKesson in December 2010. At US Oncology, Mr. Broussard served in a number of senior executive roles, including Chief Financial Officer, Chief Executive Officer, and Chairman of the Board.

(2) Mr. Murray currently serves as Executive Vice President and Chief Operating Officer, having held this position since December 2011. Mr. Murray has held the position of Chief Operating Officer since February 2006, and was the Chief Operating Officer – Market and Business Segment Operations from September 2002 to February 2006. Mr. Murray joined the Company in December 1989.

(3) Mr. Bloem currently serves as Senior Vice President, Chief Financial Officer and Treasurer, having held this position since July 2002. Mr. Bloem joined the Company in February 2001.



(4) Ms. Bierbower currently serves as President, Employer Group Segment, having held this position since May 2012. Prior to this, since 2009, Ms. Bierbower led Humana’s Specialty Benefits area, including dental, vision, life, disability and workplace voluntary benefits. Ms. Bierbower joined the Company in 2001.

(5) Mr. Huval currently serves as Senior Vice President and Chief Human Resources Officer, having been elected to this position in December 2012. Prior to joining the Company, Mr. Huval spent 10 years at Bank of America in multiple senior-level roles, including Human Resources executive and Chief Information Officer for Global Wealth & Investment Management, as well as Human Resources executive for both Global Treasury Services and Technology & Global Operations.

(6) Mr. Kusserow currently serves as Senior Vice President and Chief Strategy and Corporate Development Officer, having held this position since February 2009 when he joined the Company. Prior to joining the Company, Mr. Kusserow served as Managing Director of Private Equity at the Chicago-based investment firm B.C. Ziegler and Company. He also served as Managing Director and Chief Investment Officer of the Ziegler HealthVest Fund, where he focused on early-stage investments in health care services and health care IT. From 2004 to 2007, he was Managing Director of San Ysidro Capital Partners LLC, a health care services consulting and investment advisory firm.

(7) Mr. LeClaire currently serves as Senior Vice President and Chief Service and Information Officer, having held this position since August 2011. Prior to that, he served as Chief Technology Officer from 2002 to August 2011. Mr. LeClaire joined the Company in August 1999.

(8) Mr. Liston currently serves as President, Retail Segment, having held this position since March 2012. Prior to that, Mr. Liston held the position of Senior Vice President – Senior Products from July 2008 to February 2012 and Senior Vice President – Strategy and Corporate Development from July 2000 to June 2008. Mr. Liston joined the Company in December 1994.

(9) Ms. Margulis currently serves as Senior Vice President – Public Affairs, having held this position since January 2000. Ms. Margulis joined the Company in November 1985.

(10) Mr. McClain currently serves as President, Government and Other Businesses, having held this position since February 2012. Prior to this, Mr. McClain was President and CEO of Humana Veterans Healthcare Services.

(11) Mr. Perkins currently serves as President, Health and Well-Being Services Segment, having held this position since May 2012. Prior to this, Mr. Perkins served as the Company’s Senior Vice President of Health Care Delivery Systems and Clinical Processes. Mr. Perkins joined the Company in 1976.

(12) Mr. Todoroff currently serves as Senior Vice President and General Counsel, having held this position since August 2008. Prior to joining the Company, Mr. Todoroff served as Vice President, Senior Corporate Counsel and Corporate Secretary for Aetna Inc. from 2006 through July 2008. Mr. Todoroff joined Aetna’s Legal Department in 1995 and held various positions of increasing responsibility.

(13) Mr. McCulley currently serves as Vice President and Controller (Principal Accounting Officer), having held this position since August 2004. Prior to that, he served as Vice President and Controller from January 2001 to August 2004. Mr. McCulley joined the Company in May 1990.

Executive officers are elected annually by our Board of Directors and serve until their successors are elected or until resignation or removal. There are no family relationships among any of our executive officers.

## Section 16(a) Beneficial Ownership Reporting Compliance

The information required by this Item is herein incorporated by reference from our Proxy Statement for the Annual Meeting of Stockholders scheduled to be held on April 25, 2013 appearing under the caption “Section 16(a) Beneficial Ownership Reporting Compliance” of such Proxy Statement.



## Code of Ethics for Chief Executive Officer and Senior Financial Officers

We have adopted a Code of Ethics for the Chief Executive Officer and Senior Financial Officers, violations of which should be reported to the Audit Committee. The code may be viewed through the Investor Relations section of our web site at www.humana.com. Any amendment to or waiver of the application of the Code of Ethics for the Chief Executive Officer and Senior Financial Officers will be promptly disclosed through the Investor Relations section of our web site at www.humana.com.

## Code of Business Conduct and Ethics

Since 1995, we have operated under an omnibus Code of Ethics and Business Conduct, known as the Humana Inc. Principles of Business Ethics. All employees and directors are required to annually affirm in writing their acceptance of the code. The Humana Inc. Principles of Business Ethics was adopted by our Board of Directors in February 2004 as the document to comply with the New York Stock Exchange Corporate Governance Standard 303A.10. The Humana Inc. Principles of Business Ethics is available on our web site at www.humana.com. Any waiver of the application of the Humana Inc. Principles of Business Ethics to directors or executive officers must be made by the Board of Directors and will be promptly disclosed on our web site at www.humana.com.

## Corporate Governance Items

We have made available free of charge on or through the Investor Relations section of our web site at www.humana.com our annual reports on Form 10-K, quarterly reports on Form 10-Q, proxy statements, and all of our other reports, and, if applicable, amendments to those reports filed or furnished pursuant to Section 13(a) of the Exchange Act, as soon as reasonably practicable after we electronically file such material with, or furnish it to, the SEC. Also available on our Internet web site is information about our corporate governance, including:

• a determination of independence for each member of our Board of Directors;

• the name, membership, role, and charter of each of the various committees of our Board of Directors;

- the name(s) of the directors designated as a financial expert under rules and regulations promulgated by the SEC;

- the responsibility of the Company’s Lead Independent Director to convene, set the agenda for, and lead executive sessions of the non-management directors;

• the pre-approval process of non-audit services provided by our independent accountants;

• our by-laws and Certificate of Incorporation;

• our Majority Vote policy;

• our Related Persons Transaction Policy;

• the process by which interested parties can communicate with directors;

• the process by which stockholders can make director nominations (pursuant to our By-laws);

• our Corporate Governance Guidelines;

• our Policy Regarding Transactions in Company Securities, Inside Information and Confidentiality;

• stock ownership guidelines for directors and for executive officers;

• the Humana Inc. Principles of Business Ethics and any waivers thereto; and

- the Code of Ethics for the Chief Executive Officer and Senior Financial Officers and any waivers thereto.

Any waivers or amendments for directors or executive officers to the Humana Inc. Principles of Business Ethics and the Code of Ethics for the Chief Executive Officer and Senior Financial Officers will be promptly displayed on our web site. Additional information about these items can be found in, and is incorporated by reference to, our Proxy Statement for the Annual Meeting of Stockholders scheduled to be held on April 25, 2013.



Material Changes to the Procedures by which Security Holders May Recommend Nominees to the Registrant’s Board of Directors

None.

## Audit Committee Financial Expert

The information required by this Item is herein incorporated by reference from our Proxy Statement for the Annual Meeting of Stockholders scheduled to be held on April 25, 2013 appearing under the caption “Corporate Governance – Audit Committee” of such Proxy Statement.

## Audit Committee Composition and Independence

The information required by this Item is herein incorporated by reference from our Proxy Statement for the Annual Meeting of Stockholders scheduled to be held on April 25, 2013 appearing under the caption “Corporate Governance – Committee Composition” of such Proxy Statement.

## ITEM 11. EXECUTIVE COMPENSATION

Additional information required by this Item is incorporated herein by reference from our Proxy Statement for the Annual Meeting of Stockholders scheduled to be held on April 25, 2013 appearing under the captions “Corporate Governance – Organization & Compensation Committee – Compensation Committee Interlocks and Insider Participation,” “Director Compensation,” “Compensation Discussion and Analysis,” “Organization & Compensation Committee Report,” and “Executive Compensation” of such Proxy Statement.

## ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS

## Equity compensation plan information

We maintain plans under which options to purchase our common stock and under which awards of restricted stock may be made to officers, directors, key employees, and consultants. Stock options are granted with an exercise price equal to the fair market value of the underlying common stock on the date of grant. Our stock plans, as approved by the Board of Directors and stockholders, define fair market value as the average of the highest and lowest composite stock prices reported by the New York Stock Exchange on a given date. Exercise provisions vary, but most options vest in whole or in part 1 to 3 years after grant and expire 7 to 10 years after grant.

Information concerning stock option awards and the number of securities remaining available for future issuance under our equity compensation plans in effect as of December 31, 2012 follows:

<table><tr><td>Plan category</td><td>(a) Number of securities to be issued upon exercise of outstanding options, warrants and rights</td><td>(b) Weighted-average exercise price of outstanding options, warrants and rights</td><td>(c) Number of securities remaining available for future issuance under equity compensation plans (excluding securities reflected in column(a))</td></tr><tr><td>Equity compensation plans approved by security holders (1)</td><td>2,232,800</td><td>$61.6807</td><td>17,223,584 (2)(3)</td></tr><tr><td>Equity compensation plans not approved by security holders</td><td>0</td><td>0</td><td>0</td></tr><tr><td>Total</td><td>2,232,800</td><td>$61.6807</td><td>17,223,584</td></tr></table>

(1) The above table does not include awards of shares of restricted stock or restricted stock units. For information concerning these awards, see Note 12.



(2) The Humana Inc. 2011 Stock Incentive Plan was approved by stockholders at the Annual Meeting held on April 21, 2011. On July 5, 2011, 18.5 million shares were registered with the Securities and Exchange Commission on Form S-8.

(3) Of the number listed above, 7,597,107 (294,561 from the 2003 Plan and 7,302,546 from the 2011 Plan) can be issued as restricted stock at December 31, 2012 (giving effect to the provision that one restricted share is equivalent to 1.7 stock options in the 2003 Plan and 2.29 stock options in the 2011 Plan).

## ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE

The information required by this Item is herein incorporated by reference from our Proxy Statement for the Annual Meeting of Stockholders scheduled to be held on April 25, 2013 appearing under the captions “Certain Transactions with Management and Others” and “Corporate Governance – Independent Directors” of such Proxy Statement.

## ITEM 14. PRINCIPAL ACCOUNTING FEES AND SERVICES

The information required by this Item is herein incorporated by reference from our Proxy Statement for the Annual Meeting of Stockholders scheduled to be held on April 25, 2013 appearing under the caption “Audit Committee Report” of such Proxy Statement.



## PART IV

## ITEM 15. EXHIBITS, FINANCIAL STATEMENT SCHEDULES

(a) The financial statements, financial statement schedules and exhibits set forth below are filed as part of this report.

(1) Financial Statements – The response to this portion of Item 15 is submitted as Item 8 of Part II of this report.

(2) The following Consolidated Financial Statement Schedules are included herein:

Schedule I Parent Company Financial Information

Schedule II Valuation and Qualifying Accounts

All other schedules have been omitted because they are not applicable.

(3) Exhibits:

3(a) Restated Certificate of Incorporation of Humana Inc. filed with the Secretary of State of Delaware on November 9, 1989, as restated to incorporate the amendment of January 9, 1992, and the correction of March 23, 1992 (incorporated herein by reference to Exhibit 4(i) to Humana Inc.'s Post-Effective Amendment No.1 to the Registration Statement on Form S-8 (Reg. No. 33-49305) filed February 2, 1994).

(b) By-Laws of Humana Inc., as amended on January 4, 2007 (incorporated herein by reference to Exhibit 3 to Humana Inc.'s Annual Report on Form 10-K for the year ended December 31, 2006).

4(a) Indenture, dated as of August 5, 2003, by and between Humana Inc. and The Bank of New York, as trustee (incorporated herein by reference to Exhibit 4.1 to Humana Inc.'s Quarterly Report on Form 10-Q for the quarter ended September 30, 2003).

(b) First Supplemental Indenture, dated as of August 5, 2003, by and between Humana Inc. and The Bank of New York, as trustee (incorporated herein by reference to Exhibit 4.2 to Humana Inc.'s Quarterly Report on Form 10-Q for the quarter ended September 30, 2003).

(c) Second Supplemental Indenture, dated as of May 31, 2006, by and between Humana Inc. and The Bank of New York Trust Company, N.A., as trustee (incorporated herein by reference to Exhibit 4.1 to Humana Inc.'s Current Report on Form 8-K filed on May 31, 2006).

(d) Third Supplemental Indenture, dated as of June 5, 2008, by and between Humana Inc. and The Bank of New York Trust Company, N.A., as trustee (incorporated herein by reference to Exhibit 4.1 to Humana Inc.'s Current Report on Form 8-K filed on June 5, 2008).

(e) Fourth Supplemental Indenture, dated as of June 5, 2008, by and between Humana Inc. and The Bank of New York Trust Company, N.A., as trustee (incorporated herein by reference to Exhibit 4.3 to Humana Inc.'s Current Report on Form 8-K filed on June 5, 2008).

(f) Indenture, dated as of March 30, 2006, by and between Humana Inc. and The Bank of New York Trust Company, N.A., as trustee (incorporated herein by reference to Exhibit 4.2 to Humana Inc.'s Registration Statement on Form S-3 filed on March 31, 2006).

(g) There are no instruments defining the rights of holders with respect to long-term debt in excess of 10 percent of the total assets of Humana Inc. on a consolidated basis. Other long-term indebtedness of Humana Inc. is described herein in Note 11 to Consolidated Financial Statements. Humana Inc. agrees to furnish copies of all such instruments defining the rights of the holders of such indebtedness not otherwise filed as an Exhibit to this Annual Report on Form 10-K to the Commission upon request.



(h) Fifth Supplemental Indenture, dated as of December 10, 2012, by and between Humana Inc. and The Bank of New York Mellon Trust Company, N.A., as trustee (incorporated herein by reference to Exhibit 4.1 to Humana Inc.’s Current Report on Form 8-K filed on December 10, 2012).

(i) Sixth Supplemental Indenture, dated as of December 10, 2012, by and between Humana Inc. and The Bank of New York Mellon Trust Company, N.A., as trustee (incorporated herein by reference to Exhibit 4.3 to Humana Inc.’s Current Report on Form 8-K filed on December 10, 2012).

10(a)* 1996 Stock Incentive Plan for Employees (incorporated herein by reference to Annex A to Humana Inc.'s Proxy Statement with respect to the Annual Meeting of Stockholders held on May 9, 1996).

(b)* 1996 Stock Incentive Plan for Employees as amended in 1998 (incorporated herein by reference to Exhibit C to Humana Inc.'s Proxy Statement with respect to the Annual Meeting of Stockholders held on May 14, 1998).

(d)* Form of Company’s Stock Option Agreement under the 1996 Stock Incentive Plan for Employees (Non-Qualified Stock Options) (incorporated herein by reference to Exhibit 10(a) to Humana Inc.’s Current Report on Form 8-K filed on August 26, 2004).

(e)* Form of Company’s Stock Option Agreement under the 1996 Stock Incentive Plan for Employees (Incentive Stock Options) (incorporated herein by reference to Exhibit 10(b) to Humana Inc.’s Current Report on Form 8-K filed on August 26, 2004).

(f)* Form of Company’s Stock Option Agreement under the Amended and Restated 2003 Stock Incentive Plan (Non-Qualified Stock Options with Non-Compete/Non-Solicit) (incorporated herein by reference to Exhibit 10(f) to Humana Inc.’s Annual Report on Form 10-K filed on February 19, 2010).

(g)* Form of Company’s Stock Option Agreement under the Amended and Restated 2003 Stock Incentive Plan (Incentive Stock Options with Non-Compete/Non-Solicit) (incorporated herein by reference to Exhibit 10(g) to Humana Inc.’s Annual Report on Form 10-K filed on February 19, 2010).

(h)* Humana Inc. Amended and Restated 2003 Stock Incentive Plan (incorporated herein by reference to Appendix A to Humana Inc.’s Proxy Statement with respect to the Annual Meeting of Stockholders held on April 27, 2006).

(i)* Humana Inc. Executive Management Incentive Compensation Plan, as amended and restated February 1, 2008 (incorporated herein by reference to Appendix A to Humana Inc.’s Proxy Statement with respect to the Annual Meeting of Stockholders held on April 24, 2008).

(j)* Form of Change of Control Agreement amended on October 23, 2008 (incorporated herein by reference to Exhibit 10(n) to Humana Inc.’s Annual Report on Form 10-K for the fiscal year ended December 31, 2008).

(k)* Employment Agreement, dated as of May 16, 2008, by and between Humana Inc. and Michael B. McCallister (incorporated herein by reference to Exhibit 10.1 to Humana Inc.’s Current Report on Form 8-K filed on May 21, 2008).

(I)* Trust under Humana Inc. Deferred Compensation Plans (incorporated herein by reference to Exhibit 10(p) to Humana Inc.’s Annual Report on Form 10-K for the fiscal year ended December 31, 1999).

(m)† The Humana Inc. Deferred Compensation Plan for Non-Employee Directors (as amended on October 18, 2012).



(n)* Severance policy as amended and restated on October 23, 2007 (incorporated herein by reference to Exhibit 10(r) to Humana Inc.'s Annual Report on Form 10-K for the fiscal year ended December 31, 2007).

(o)* Humana Inc. Deferred Compensation Plan (incorporated herein by reference to Exhibit 4.1 to the Company’s Registration Statement on Form S-8 (Reg. No. 333-171616), filed on January 7, 2011).

(p)* Humana Retirement Equalization Plan, as amended and restated as of January 1, 2011 (incorporated herein by reference to Exhibit 10(p) to Humana Inc.'s Annual Report on Form 10-K filed on February 17, 2011).

(q)* Letter agreement with Humana Inc. officers concerning health insurance availability (incorporated herein by reference to Exhibit 10(mm) to Humana Inc.'s Annual Report on Form 10-K for the fiscal year ended December 31, 1994).

(r)* Executive Long-Term Disability Program (incorporated herein by reference to Exhibit 10(a) to Humana Inc.'s Quarterly Report on Form 10-Q for the quarter ended September 30, 2004).

(s)* Indemnity Agreement (incorporated herein by reference to Appendix B to Humana Inc.'s Proxy Statement with respect to the Annual Meeting of Stockholders held on January 8, 1987).

(t)†* Form of Company’s Restricted Stock Unit Agreement with Time/Performance Vesting and Agreement not to Compete or Solicit, under the 2011 Stock Incentive Plan.

(u)* Form of Company’s Restricted Stock Agreement with Non-Solicit under the Amended and Restated 2003 Stock Incentive Plan (incorporated herein by reference to Exhibit 10(u) to Humana Inc.’s Annual Report on Form 10-K filed on February 19, 2010).

(v)† Summary of the Company’s Financial Planning Program for our executive officers.

(w)* Form of Company’s Combined Option and Restricted Stock Agreement with Non-Compete/Non-Solicit under the Amended and Restated 2003 Stock Incentive Plan (incorporated herein by reference to Exhibit 10(w) to Humana Inc.’s Annual Report on Form 10-K filed on February 19, 2010).

(x)* Form of Company’s Restricted Stock Agreement with Non-Compete/Non-Solicit under the Amended and Restated 2003 Stock Incentive Plan (incorporated herein by reference to Exhibit 10(x) to Humana Inc.’s Annual Report on Form 10-K filed on February 19, 2010).

(y)* Form of Company’s Restricted Stock Unit Agreement with Non-Compete/Non-Solicit under the Amended and Restated 2003 Stock Incentive Plan (incorporated herein by reference to Exhibit 10(y) to Humana Inc.’s Annual Report on Form 10-K filed on February 24, 2012).

(z) Five-Year Credit Agreement, dated as of November 22, 2011 (incorporated herein by reference to Exhibit 10 to Humana Inc.'s Current Report on Form 8-K filed on November 28, 2011).

(cc) Form of CMS Coordinated Care Plan Agreement (incorporated herein by reference to Exhibit 10.1 to Humana Inc.'s Quarterly Report on Form 10-Q for the quarter ended September 30, 2005).

(dd) Form of CMS Private Fee for Service Agreement (incorporated herein by reference to Exhibit 10.2 to Humana Inc.'s Quarterly Report on Form 10-Q for the quarter ended September 30, 2005).

(ee) Addendum to Agreement Providing for the Operation of a Medicare Voluntary Prescription Drug Plan (incorporated herein by reference to Exhibit 10.3 to Humana Inc.'s Quarterly Report on Form 10-Q for the quarter ended September 30, 2005).



(ff) Addendum to Agreement Providing for the Operation of an Employer/Union-only Group Medicare Advantage Prescription Drug Plan (incorporated herein by reference to Exhibit 10.4 to Humana Inc.'s Quarterly Report on Form 10-Q for the quarter ended September 30, 2005).

(gg) Addendum to Agreement Providing for the Operation of an Employer/Union-only Group Medicare Advantage-Only Plan (incorporated herein by reference to Exhibit 10.5 to Humana Inc.'s Quarterly Report on Form 10-Q for the quarter ended September 30, 2005).

(hh) Addendum to Agreement Providing for the Operation of a Medicare Advantage Regional Coordinated Care Plan (incorporated herein by reference to Exhibit 10.6 to Humana Inc.'s Quarterly Report on Form 10-Q for the quarter ended September 30, 2005).

(ii) Explanatory Note regarding Medicare Prescription Drug Plan Contracts between Humana and CMS (incorporated herein by reference to Exhibit 10(nn) to Humana Inc.'s Annual Report on Form 10-K for the fiscal year ended December 31, 2005).

(jj)* Form of Company’s Restricted Stock Unit Agreement with Non-Solicit under the Amended and Restated 2003 Stock Incentive Plan (incorporated herein by reference to Exhibit 10(jj) to Humana Inc.’s Annual Report on Form 10-K filed on February 19, 2010).

(kk)* Form of Company’s Stock Option Agreement under the Amended and Restated 2003 Stock Incentive Plan (Non-Qualified Stock Options without Non-Compete/Non-Solicit) (incorporated herein by reference to Exhibit 10(kk) to Humana Inc.’s Annual Report on Form 10-K filed on February 19, 2010).

(mm)** Agreement between the United States Department of Defense and Humana Military Healthcare Services, Inc., a wholly owned subsidiary of Humana Inc., dated as March 3, 2011 (incorporated herein by reference to Exhibit 10(mm) to Humana Inc.'s Annual Report on Form 10-K filed on February 24, 2012).

(nn)* Humana Inc. 2011 Stock Incentive Plan (incorporated herein by reference to Appendix A to Humana Inc.'s Proxy Statement with respect to the Annual Meeting of Stockholders held on April 21, 2011).

(oo)* Form of Company’s Stock Option Agreement under the 2011 Stock Incentive Plan (Non-Qualified Stock Options with Non-Compete/Non-Solicit) (incorporated herein by reference to Exhibit 10(oo) to Humana Inc.’s Annual Report on Form 10-K filed on February 24, 2012).

(pp)* Form of Company’s Stock Option Agreement under the 2011 Stock Incentive Plan (Incentive Stock Options with Non-Compete/Non-Solicit) (incorporated herein by reference to Exhibit 10(pp) to Humana Inc.’s Annual Report on Form 10-K filed on February 24, 2012).

(qq)* Form of Company’s Restricted Stock Agreement and Agreement not to Compete or Solicit under the 2011 Stock Incentive Plan (incorporated herein by reference to Exhibit 10(qq) to Humana Inc.’s Annual Report on Form 10-K filed on February 24, 2012).

(rr)* Form of Company’s Restricted Stock Unit Agreement and Agreement not to Compete or Solicit under the 2011 Stock Incentive Plan (incorporated herein by reference to Exhibit 10(rr) to Humana Inc.’s Annual Report on Form 10-K filed on February 24, 2012).

(ss)* Form of Company’s Restricted Stock Agreement and Agreement not to Compete or Solicit under the Amended and Restated 2003 Stock Incentive Plan (incorporated herein by reference to Exhibit 10(ss) to Humana Inc.’s Annual Report on Form 10-K filed on February 24, 2012).

(tt)* Amended and Restated Employment Agreement, dated as of November 2, 2011, by and between Humana Inc. and Bruce D. Broussard (incorporated herein by reference to Exhibit 10.1 to Humana’s Current Report on Form 8-K, filed on November 4, 2011).



(uu)* Employment Agreement, dated as of November 2, 2012, by and between Humana Inc. and Bruce D. Broussard (incorporated herein by reference to Exhibit 10.1 to Humana Inc.'s current report on Form 8-K filed on November 5, 2012).

(vv)* Letter Agreement, dated as of October 31, 2012, by and between Humana Inc. and Michael B. McCallister (incorporated herein by reference to Exhibit 10.2 to Humana Inc.'s current report on Form 8-K filed on November 5, 2012).

(ww)* Voluntary Release and Mutual Separation Agreement dated as of February 29, 2012, by and between Humana Inc. and V. Rajamannar Madabhushi (incorporated by reference to Exhibit 10.1 to Humana Inc.'s current report on Form 8-K filed February 29, 2012).

12 † Computation of ratio of earnings to fixed charges.

14 Code of Conduct for Chief Executive Officer & Senior Financial Officers (incorporated herein by reference to Exhibit 14 to Humana Inc.'s Annual Report on Form 10-K for the fiscal year ended December 31, 2003).

21 † List of subsidiaries.

23 † Consent of PricewaterhouseCoopers LLP.

31.1 † CEO certification pursuant to Rule 13a-14(a)/15d-14(a).

31.2 † CFO certification pursuant to Rule 13a-14(a)/15d-14(a).

32 † Certification pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes – Oxley Act of 2002.

101.INS† XBRL Instance Document

101.SCH† XBRL Taxonomy Extension Schema Document

101.CAL† XBRL Taxonomy Calculation Linkbase Document

101.DEF† XBRL Taxonomy Definition Linkbase Document

101.LAB† XBRL Taxonomy Label Linkbase Document

101.PRE† XBRL Taxonomy Presentation Linkbase Document

* Exhibits 10(a) through and including 10(y), 10(jj), 10(kk) and 10(nn) through and including 10(ww) are compensatory plans or management contracts.

** Pursuant to Rule 24b-2 of the Securities Exchange Act of 1934, as amended, confidential portions of this exhibit have been omitted and filed separately with the Securities and Exchange Commission pursuant to a request for confidential treatment.

† Submitted electronically with this report.

Attached as Exhibit 101 to this report are the following documents formatted in XBRL (Extensible Business Reporting Language): (i) the Consolidated Balance Sheets at December 31, 2012 and 2011; (ii) the Consolidated Statements of Income for the years ended December 31, 2012, 2011 and 2010; (iii) the Consolidated Statements of Comprehensive Income for the years ended December 31, 2012, 2011 and 2011; (iv) the Consolidated Statements of Cash Flows for the years ended December 31, 2012, 2011 and 2010; and (v) Notes to Consolidated Financial Statements.



## Humana Inc.
SCHEDULE I—PARENT COMPANY FINANCIAL INFORMATION
CONDENSED BALANCE SHEETS

<table><tr><td rowspan="3"></td><td colspan="2">December 31,</td></tr><tr><td>2012</td><td>2011</td></tr><tr><td colspan="2">(in millions, except share amounts)</td></tr><tr><td>ASSETS</td><td></td><td></td></tr><tr><td>Current assets:</td><td></td><td></td></tr><tr><td>Cash and cash equivalents</td><td>$ 151</td><td>$ 187</td></tr><tr><td>Investment securities</td><td>195</td><td>307</td></tr><tr><td>Receivable from operating subsidiaries</td><td>523</td><td>572</td></tr><tr><td>Other current assets</td><td>97</td><td>75</td></tr><tr><td>Total current assets</td><td>966</td><td>1,141</td></tr><tr><td>Property and equipment, net</td><td>660</td><td>543</td></tr><tr><td>Investments in subsidiaries</td><td>12,136</td><td>9,971</td></tr><tr><td>Other long-term assets</td><td>69</td><td>55</td></tr><tr><td>Total assets</td><td>$13,831</td><td>$11,710</td></tr><tr><td>LIABILITIES AND STOCKHOLDERS&#x27; EQUITY</td><td></td><td></td></tr><tr><td>Current liabilities:</td><td></td><td></td></tr><tr><td>Payable to operating subsidiaries</td><td>$ 1,713</td><td>$ 1,364</td></tr><tr><td>Current portion of notes payable to operating subsidiaries</td><td>28</td><td>28</td></tr><tr><td>Book overdraft</td><td>52</td><td>44</td></tr><tr><td>Other current liabilities</td><td>376</td><td>400</td></tr><tr><td>Total current liabilities</td><td>2,169</td><td>1,836</td></tr><tr><td>Long-term debt</td><td>2,611</td><td>1,623</td></tr><tr><td>Notes payable to operating subsidiaries</td><td>9</td><td>9</td></tr><tr><td>Other long-term liabilities</td><td>195</td><td>179</td></tr><tr><td>Total liabilities</td><td>4,984</td><td>3,647</td></tr><tr><td>Commitments and contingencies</td><td></td><td></td></tr><tr><td>Stockholders&#x27; equity:</td><td></td><td></td></tr><tr><td>Preferred stock, $1 par; 10,000,000 shares authorized; none issued</td><td>0</td><td>0</td></tr><tr><td>Common stock, $0.16 2/3 par; 300,000,000 shares authorized; 194,470,820 shares issued in 2012 and 193,230,310 shares issued in 2011</td><td>32</td><td>32</td></tr><tr><td>Capital in excess of par value</td><td>2,101</td><td>1,938</td></tr><tr><td>Retained earnings</td><td>7,881</td><td>6,825</td></tr><tr><td>Accumulated other comprehensive income</td><td>386</td><td>303</td></tr><tr><td>Treasury stock, at cost, 36,138,955 shares in 2012 and 29,225,996 shares in 2011</td><td>(1,553)</td><td>(1,035)</td></tr><tr><td>Total stockholders&#x27; equity</td><td>8,847</td><td>8,063</td></tr><tr><td>Total liabilities and stockholders&#x27; equity</td><td>$13,831</td><td>$11,710</td></tr></table>



## Humana Inc.

## SCHEDULE I—PARENT COMPANY FINANCIAL INFORMATION
CONDENSED STATEMENTS OF INCOME

<table><tr><td rowspan="3"></td><td colspan="3">For the year ended December 31,</td></tr><tr><td>2012</td><td>2011</td><td>2010</td></tr><tr><td colspan="3">(in millions)</td></tr><tr><td>Revenues:</td><td></td><td></td><td></td></tr><tr><td>Management fees charged to operating subsidiaries</td><td>$1,220</td><td>$1,272</td><td>$1,175</td></tr><tr><td>Investment and other income, net</td><td>5</td><td>8</td><td>14</td></tr><tr><td></td><td>1,225</td><td>1,280</td><td>1,189</td></tr><tr><td>Expenses:</td><td></td><td></td><td></td></tr><tr><td>Operating costs</td><td>1,229</td><td>1,270</td><td>956</td></tr><tr><td>Depreciation</td><td>172</td><td>164</td><td>166</td></tr><tr><td>Interest</td><td>106</td><td>107</td><td>103</td></tr><tr><td></td><td>1,507</td><td>1,541</td><td>1,225</td></tr><tr><td>Loss before income taxes and equity in net earnings of subsidiaries</td><td>(282)</td><td>(261)</td><td>(36)</td></tr><tr><td>(Benefit) provision for income taxes</td><td>(102)</td><td>(81)</td><td>35</td></tr><tr><td>Loss before equity in net earnings of subsidiaries</td><td>(180)</td><td>(180)</td><td>(71)</td></tr><tr><td>Equity in net earnings of subsidiaries</td><td>1,402</td><td>1,599</td><td>1,170</td></tr><tr><td>Net income</td><td>$1,222</td><td>$1,419</td><td>$1,099</td></tr></table>



## Humana Inc.

## SCHEDULE I—PARENT COMPANY FINANCIAL INFORMATION
CONDENSED STATEMENTS OF COMPREHENSIVE INCOME

<table><tr><td rowspan="3"></td><td colspan="3">For the year ended December 31,</td></tr><tr><td>2012</td><td>2011</td><td>2010</td></tr><tr><td colspan="3">(in millions)</td></tr><tr><td>Net income</td><td>$1,222</td><td>$1,419</td><td>$1,099</td></tr><tr><td>Other comprehensive income:</td><td></td><td></td><td></td></tr><tr><td>Gross unrealized investment gain</td><td>164</td><td>299</td><td>129</td></tr><tr><td>Effect of income taxes</td><td>(60)</td><td>(109)</td><td>(47)</td></tr><tr><td>Total unrealized investment gain, net of tax</td><td>104</td><td>190</td><td>82</td></tr><tr><td>Reclassification adjustment for net realized gains included in net income</td><td>(33)</td><td>(11)</td><td>(6)</td></tr><tr><td>Effect of income taxes</td><td>12</td><td>4</td><td>2</td></tr><tr><td>Total reclassification adjustment, net of tax</td><td>(21)</td><td>(7)</td><td>(4)</td></tr><tr><td>Other comprehensive income, net of tax</td><td>83</td><td>183</td><td>78</td></tr><tr><td>Comprehensive income</td><td>$1,305</td><td>$1,602</td><td>$1,177</td></tr></table>



## Humana Inc.

## SCHEDULE I—PARENT COMPANY FINANCIAL INFORMATION
CONDENSED STATEMENTS OF CASH FLOWS

<table><tr><td rowspan="3"></td><td colspan="3">For the year ended December 31,</td></tr><tr><td>2012</td><td>2011</td><td>2010</td></tr><tr><td colspan="3">(in millions)</td></tr><tr><td>Net cash provided by operating activities</td><td>$ 1,611</td><td>$1,106</td><td>$ 1,219</td></tr><tr><td>Cash flows from investing activities:</td><td></td><td></td><td></td></tr><tr><td>Acquisitions</td><td>(1,235)</td><td>(223)</td><td>(840)</td></tr><tr><td>Purchases of investment securities</td><td>(338)</td><td>(632)</td><td>(633)</td></tr><tr><td>Proceeds from sale of investment securities</td><td>127</td><td>10</td><td>16</td></tr><tr><td>Maturities of investment securities</td><td>316</td><td>548</td><td>698</td></tr><tr><td>Purchases of property and equipment, net</td><td>(284)</td><td>(225)</td><td>(166)</td></tr><tr><td>Capital contributions to operating subsidiaries</td><td>(629)</td><td>(214)</td><td>(230)</td></tr><tr><td>Net cash used in investing activities</td><td>(2,043)</td><td>(736)</td><td>(1,155)</td></tr><tr><td>Cash flows from financing activities:</td><td></td><td></td><td></td></tr><tr><td>Proceeds from issuance of senior notes, net</td><td>990</td><td>0</td><td>0</td></tr><tr><td>Change in book overdraft</td><td>7</td><td>(21)</td><td>2</td></tr><tr><td>Common stock repurchases</td><td>(518)</td><td>(541)</td><td>(108)</td></tr><tr><td>Dividends paid</td><td>(165)</td><td>(82)</td><td>0</td></tr><tr><td>Tax benefit from stock-based compensation</td><td>22</td><td>15</td><td>2</td></tr><tr><td>Proceeds from stock option exercises and other</td><td>60</td><td>132</td><td>8</td></tr><tr><td>Net cash provided by (used in) financing activities</td><td>396</td><td>(497)</td><td>(96)</td></tr><tr><td>Decrease in cash and cash equivalents</td><td>(36)</td><td>(127)</td><td>(32)</td></tr><tr><td>Cash and cash equivalents at beginning of year</td><td>187</td><td>314</td><td>346</td></tr><tr><td>Cash and cash equivalents at end of year</td><td>$ 151</td><td>$ 187</td><td>$ 314</td></tr></table>



# Humana Inc.
SCHEDULE I—PARENT COMPANY FINANCIAL INFORMATION
NOTES TO CONDENSED FINANCIAL STATEMENTS

## 1. BASIS OF PRESENTATION

Parent company financial information has been derived from our consolidated financial statements and excludes the accounts of all operating subsidiaries. This information should be read in conjunction with our consolidated financial statements.

## 2. TRANSACTIONS WITH SUBSIDIARIES

## Management Fee

Through intercompany service agreements approved, if required, by state regulatory authorities, Humana Inc., our parent company, charges a management fee for reimbursement of certain centralized services provided to its subsidiaries including information systems, disbursement, investment and cash administration, marketing, legal, finance, and medical and executive management oversight.

## Dividends

Cash dividends received from subsidiaries and included as a component of net cash provided by operating activities were $1.2 billion in 2012, $1.1 billion in 2011, and $747 million in 2010.

## Guarantee

Through indemnity agreements approved by state regulatory authorities, certain of our regulated subsidiaries generally are guaranteed by our parent company in the event of insolvency for; (1) member coverage for which premium payment has been made prior to insolvency; (2) benefits for members then hospitalized until discharged; and (3) payment to providers for services rendered prior to insolvency. Our parent has also guaranteed the obligations of our military services subsidiaries.

## Notes Receivables from Operating Subsidiaries

We funded certain subsidiaries with surplus note agreements. These notes are generally non-interest bearing and may not be entered into or repaid without the prior approval of the applicable Departments of Insurance.

## Notes Payable to Operating Subsidiaries

We borrowed funds from certain subsidiaries with notes generally collateralized by real estate. These notes, which have various payment and maturity terms, bear interest ranging from 1.40% to 6.65% and are payable in 2013 and 2014. We recorded interest expense of $1 million related to these notes for each of the years ended December 31, 2012, 2011 and 2010.

## 3. REGULATORY REQUIREMENTS

Certain of our subsidiaries operate in states that regulate the payment of dividends, loans, or other cash transfers to Humana Inc., our parent company, and require minimum levels of equity as well as limit investments to approved securities. The amount of dividends that may be paid to Humana Inc. by these subsidiaries, without prior approval by state regulatory authorities, or ordinary dividends, is limited based on the entity’s level of statutory income and statutory capital and surplus. In most states, prior notification is provided before paying a dividend even if approval is not required. Actual dividends paid may vary due to consideration of excess statutory capital and surplus and expected future surplus requirements related to, for example, premium volume and product mix.



## Humana Inc.

## SCHEDULE I—PARENT COMPANY FINANCIAL INFORMATION
NOTES TO CONDENSED FINANCIAL STATEMENTS—(Continued)

Although minimum required levels of equity are largely based on premium volume, product mix, and the quality of assets held, minimum requirements vary significantly at the state level. Our state regulated subsidiaries had aggregate statutory capital and surplus of approximately $5.1 billion and $4.7 billion as of December 31, 2012 and 2011, respectively, which exceeded aggregate minimum regulatory requirements. Excluding Puerto Rico subsidiaries, the amount of ordinary dividends that may be paid to our parent company in 2013 is approximately $911 million in the aggregate. This compares to ordinary dividends that were able to be paid in 2012 of approximately $860 million.

## 4. ACQUISITIONS

Refer to Note 3 of the notes to consolidated financial statements in this Annual Report on Form 10-K for a description of acquisitions.

## 5. INCOME TAXES

Refer to Note 10 of the notes to consolidated financial statements in this Annual Report on Form 10-K for a description of income taxes.

## 6. DEBT

Refer to Note 11 of the notes to consolidated financial statements in this Annual Report on Form 10-K for a description of debt.

## 7. STOCKHOLDER'S EQUITY

Refer to Note 14 of the notes to consolidated financial statements in this Annual Report on Form 10-K for a description of stockholders' equity, including stock repurchases and stockholder dividends.



## Humana Inc.

## SCHEDULE II—VALUATION AND QUALIFYING ACCOUNTS
For the Years Ended December 31, 2012, 2011, and 2010
(in millions)

<table><tr><td rowspan="2"></td><td rowspan="2">Balance at Beginning of Period</td><td rowspan="2">Acquired Balances</td><td colspan="2">Additions</td><td rowspan="2">Deductions or Write-offs</td><td rowspan="2">Balance at End of Period</td></tr><tr><td>Charged (Credited) to Costs and Expenses</td><td>Charged to Other Accounts (1)</td></tr><tr><td>Allowance for loss on receivables:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>2012</td><td>$ 85</td><td>$0</td><td>$26</td><td>$8</td><td>$ (25)</td><td>$94</td></tr><tr><td>2011</td><td>52</td><td>0</td><td>31</td><td>22</td><td>(20)</td><td>85</td></tr><tr><td>2010</td><td>51</td><td>0</td><td>19</td><td>(1)</td><td>(17)</td><td>52</td></tr><tr><td>Deferred tax asset valuation allowance:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>2012</td><td>(28)</td><td>0</td><td>0</td><td>0</td><td>0</td><td>(28)</td></tr><tr><td>2011</td><td>(28)</td><td>0</td><td>0</td><td>0</td><td>0</td><td>$ (28)</td></tr><tr><td>2010</td><td>(30)</td><td>0</td><td>2</td><td>0</td><td>0</td><td>(28)</td></tr></table>

(1) Represents changes in retroactive membership adjustments to premiums revenue and contractual allowances adjustments to services revenue as more fully described in Note 2 to the consolidated financial statements.



## SIGNATURES

Pursuant to the requirements of Sections 13 or 15(d) of the Securities Exchange Act of 1934, the Company has duly caused this report to be signed on its behalf by the undersigned, thereto duly authorized.

Humana Inc.

By: /s/ JAMES H. BLOEM

James H. Bloem
Senior Vice President,
Chief Financial Officer and Treasurer
(Principal Financial Officer)

Date: February 21, 2013

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the Company and in the capacities and on the date indicated.

<table><tr><td>Signature</td><td>Title</td><td>Date</td></tr><tr><td>/s/ James H. Bloem</td><td>Senior Vice President, Chief Financial Officer and Treasurer (Principal Financial Officer)</td><td>February 21, 2013</td></tr><tr><td>James H. Bloem</td><td></td><td></td></tr><tr><td>/s/ Steven E. McCulley</td><td>Vice President and Controller (Principal Accounting Officer)</td><td>February 21, 2013</td></tr><tr><td>Steven E. McCulley</td><td></td><td></td></tr><tr><td>/s/ Bruce D. Broussard</td><td>President and Chief Executive Officer, Director (Principal Executive Officer)</td><td>February 21, 2013</td></tr><tr><td>Bruce D. Broussard</td><td></td><td></td></tr><tr><td>/s/ Michael B. McCallister</td><td>Chairman of the Board</td><td>February 21, 2013</td></tr><tr><td>Michael B. McCallister</td><td></td><td></td></tr><tr><td>/s/ Frank A. D&#x27;Amelio</td><td>Director</td><td>February 21, 2013</td></tr><tr><td>Frank A. D&#x27;Amelio</td><td></td><td></td></tr><tr><td>/s/ W. Roy Dunbar</td><td>Director</td><td>February 21, 2013</td></tr><tr><td>W. Roy Dunbar</td><td></td><td></td></tr><tr><td>/s/ Kurt J. Hilzinger</td><td>Lead Director</td><td>February 21, 2013</td></tr><tr><td>Kurt J. Hilzinger</td><td></td><td></td></tr><tr><td>/s/ David A. Jones, Jr.</td><td>Director</td><td>February 21, 2013</td></tr><tr><td>David A. Jones, Jr.</td><td></td><td></td></tr><tr><td>/s/ William J. McDonald</td><td>Director</td><td>February 21, 2013</td></tr><tr><td>William J. McDonald</td><td></td><td></td></tr><tr><td>/s/ William E. Mitchell</td><td>Director</td><td>February 21, 2013</td></tr><tr><td>William E. Mitchell</td><td></td><td></td></tr><tr><td>/s/ David B. Nash, M.D.</td><td>Director</td><td>February 21, 2013</td></tr><tr><td>David B. Nash, M.D.</td><td></td><td></td></tr><tr><td>/s/ James J. O&#x27;Brien</td><td>Director</td><td>February 21, 2013</td></tr><tr><td>James J. O&#x27;Brien</td><td></td><td></td></tr><tr><td>/s/ Marissa T. Peterson</td><td>Director</td><td>February 21, 2013</td></tr><tr><td>Marissa T. Peterson</td><td></td><td></td></tr></table>



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## Corporate Headquarters

The Humana Building | 500 West Main Street | Louisville, KY 40202 | 502.580.1000 | Humana.com

## More Information About Humana Inc.

Copies of the Company’s filings with the Securities and Exchange Commission may be obtained without charge via the Investor Relations page of the Company’s Internet site at Humana.com or by writing:

Regina C. Nethery
Vice President of Investor Relations
Humana Inc.
Post Office Box 1438
Louisville, Kentucky 40201-1438

## Transfer Agent and Registrar

American Stock Transfer & Trust Company, LLC
Shareholder Services - ATTN: Operations Center
6201 15th Avenue
Brooklyn, New York 11219
800.937.5449
Shareholder Services Direct Dial: 718.921.8124
www.amstock.com
Email: info@amstock.com



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