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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                             ---------------------
 
                                  FORM 10-K/A
                                AMENDMENT NO. 2
 
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   (MARK ONE)
      [X]         ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(D) OF
                  THE SECURITIES EXCHANGE ACT OF 1934 [NO FEE REQUIRED]
                  FOR THE FISCAL YEAR ENDED DECEMBER 31, 1997
                                               OR
      [  ]        TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF
                  THE SECURITIES EXCHANGE ACT OF 1934 [NO FEE REQUIRED]
                  FOR THE TRANSITION PERIOD FROM ____________ TO ____________
</TABLE>
 
                       COMMISSION FILE NUMBER: 000-22005
                                 MEDIRISK, INC.
             (Exact name of Registrant as specified in its charter)
 
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                DELAWARE                        58-2256400
    (State or other jurisdiction of          (I.R.S. Employer
             incorporation)               Identification Number)

     TWO PIEDMONT CENTER, SUITE 400             30305-1502
        3565 PIEDMONT ROAD, N.E.                (Zip Code)
            ATLANTA, GEORGIA
(Address of principal executive offices)
</TABLE>
 
       Registrant's telephone number, including area code: (404) 364-6700
                             ---------------------
     Securities registered pursuant to Section 12(b) of the Act: NONE
 
     Securities registered pursuant to Section 12(g) of the Act: COMMON STOCK
(Title of Class)

     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 [X]  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.  [ ]
 
     Aggregate market value of the Common Stock of the Registrant held by
non-affiliates of the registrant (3,382,196 shares) on March 24, 1998:
$76,099,410.
 
     The number of shares of Common Stock of the Registrant outstanding as of
March 24, 1998 was 4,492,802 shares.
                      DOCUMENTS INCORPORATED BY REFERENCE:
 
     None.
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                                     PART I
 
ITEM 1.  BUSINESS
 
     Medirisk, Inc. (together with its subsidiaries, "Medirisk" or the
"Company") is a provider of proprietary database products, decision-support
software and analytical services to the health care industry. The Company's
products and services enable its customers to make objective comparisons of the
financial costs and clinical outcomes of physician services to customer-specific
and industry benchmarks, assess member satisfaction with specific managed care
plans, and obtain information concerning the background and credentials of
physicians. These capabilities assist health care industry participants in
measuring the performance of health care payors and providers and forecasting
the supply of and demand for health care services.
 
     Applications for Medirisk's products include pricing managed care
contracts, evaluating physician fee schedules and utilization of physician
services, comparing provider outcomes and health plan performance, credentialing
and recruiting physicians, developing health care delivery networks, and
marketing health care services. The Company actively sells its products to over
1,000 major customers, including leading health plans, insurers, hospitals,
large multi-specialty physician groups, physician practice management companies,
employers, and pharmaceutical companies, as well as to several hundred smaller
customers, including single-specialty physician groups. Medirisk believes that
it is the leading provider of clinical and financial database products comprised
of physician-oriented content and managed care member satisfaction information
in the United States.
 
     Medirisk's databases have been built by collecting, standardizing and
normalizing more than three billion health care transaction records. The
Company's databases include records submitted by customers under an ongoing data
collection plan, data gathered from various regulatory and governmental
agencies, and data generated from the results of periodic proprietary surveys of
health care providers, consumers, managed care organizations and other payors.
Medirisk believes the long-standing relationships under which it collects data
and the data interpretation methodologies used by the Company represent
significant competitive advantages. Medirisk's databases are regularly updated
to reflect changes in the industry and, in the case of its market performance
and clinical performance databases, to take into consideration secondary factors
such as co-morbidity, case mix and demographics. These attributes permit
customers to compare objectively their financial and clinical performance to
industry or customer-specific benchmarks contained in the Company's databases
with specificity and precision.
 
INDUSTRY OVERVIEW
 
     The U.S. health care industry has grown dramatically in recent years.
According to the Health Care Financing Administration ("HCFA"), health care
expenditures have increased from less than $250 billion, or approximately 9% of
the gross domestic product, in 1980 to in excess of $1.0 trillion, or
approximately 14% of the gross domestic product, in 1996. Payors are responding
to escalating costs by seeking to transfer the financial risk associated with
the delivery of health care to providers under capitated or other managed care
arrangements. As managed care arrangements become increasingly prevalent, both
payors and providers are under intense pressure to deliver health care at the
lowest total cost while ensuring high quality results. To achieve this goal,
payors and providers must understand procedure cost and utilization rates as
well as demonstrate improved outcomes. The evolving impact of managed care has
also increased physicians' receptivity to a variety of practice affiliation and
employment structures and, consequently, the need for data that can be used to
verify physician qualifications.
 
     Traditional health care information systems have focused on the
administrative aspects of health care (i.e., accounting, billing, patient
scheduling). The Company believes there is an increasing trend toward
reimbursement structures for health care services which require sophisticated
financial information management and a growing awareness that most health care
costs are related to clinical, rather than administrative, aspects of the
delivery of care. The result has been a growing demand for databases
incorporating financial, clinical and analytical tools that leverage this data
in order to assess managed care contracts, analyze
<PAGE>   3
 
outcomes, evaluate managed care member satisfaction, verify the qualifications
of providers and meet ongoing accreditation requirements. While some payors and
providers have recently adopted new information systems that allow them to
capture cost, utilization and clinical outcomes data regarding their own
businesses, the Company believes they generally have not been able to use such
data effectively. To gain perspective on the marketplace and to analyze the
potential impact of managed care contracts, payors and providers need benchmark
data against which they can compare the data they have collected regarding their
own businesses, as well as information relating to statistical differences in
health care costs, projected utilization and outcomes among urban, suburban and
rural markets. While broad, public-sector data have previously been available,
payors and providers increasingly seek more in-depth, region-specific health
care information, which requires access to both private- and public-sector data.
 
     The health care information industry is highly fragmented and undergoing
consolidation, as vendors and service providers seek to build market share and
compete more effectively. Many existing health care information businesses have
been created by entrepreneurs who are knowledgeable in the areas of data
products and technology, but these businesses typically lack the sophisticated
marketing organizations, sales effort, capital and general management skills and
processes that are required to generate sustainable revenue expansion. Combined
with the burdens associated with product development and rapid technological
change, these issues pose significant challenges to health care information
companies that lack breadth of management experience, economies of scale and
access to capital. As a result of these factors, many smaller health care
information companies with technologically sophisticated products and a
reputation for quality service have become attractive acquisition candidates for
vendors and service providers seeking to reach critical mass.
 
STRATEGY
 
     Medirisk's objective is to become the leading provider of proprietary
database products, decision-support software and analytical services to payors,
providers, employers, pharmaceutical companies and other health care industry
participants. To attain this objective, Medirisk is pursuing the following
strategy:
 
     -  Leverage the Company's Existing Customer Base.  Medirisk believes the
        increasing demand for health care information, coupled with its broad
        customer base, provides a substantial opportunity for internal growth.
        The Company has long-standing relationships with its customers and
        believes it has developed a reputation for providing objective,
        value-added information products. The Company intends to leverage these
        relationships by cross-selling additional products and services to
        existing customers and increasing product penetration through sales to
        other operating units, departments or divisions of existing customers.
 
     -  Emphasize Recurring Revenue.  Medirisk seeks to maximize recurring
        revenue by emphasizing multi-year contracts and contract renewals. A
        substantial portion of Medirisk's revenue is generated by the licensing
        of products on an annual or multi-year basis. The Company believes that
        its high rate of recurring revenue results principally from significant
        revenue enhancements or cost savings achieved by Medirisk's customers
        when they use the Company's products, as well as from the customer's
        ongoing need for current information due to the rapid pace of change
        within the health care industry. The Company's recurring revenue
        percentage has been in excess of 70% for each of the last four years.
 
     -  Develop New Database Products and Decision-Support Tools.  Medirisk
        actively develops new products, product enhancements and
        decision-support tools and, in 1997, introduced several new products and
        product enhancements. The Company expects to introduce additional new
        products and product enhancements during 1998, including enhanced
        versions of its Fee Manager and Avenir(R) products and one of its
        clinical performance products and new clinical performance products in
        one or more additional medical specialties. Ultimately, the Company
        intends to cross-correlate existing and future databases in an effort to
        develop integrated product offerings. For example, Medirisk believes
        that by linking its market performance, clinical performance and
        physician credentials products, cost and quality can be evaluated
        together with outcomes for specific physicians, thus permitting true
 
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        management of care by allowing customers to compare the financial costs
        and expected outcomes of competing treatment regimens or providers, and
        to measure health care consumer satisfaction.
 
     -  Acquire and Integrate Complementary Products and Businesses.  Medirisk
        intends to acquire additional companies, products, databases and other
        resources to expand into related areas and to increase market share
        within the Company's existing product lines. Medirisk believes that the
        acquisition of new products and customers creates compelling
        cross-selling opportunities, enhances the development of new products by
        facilitating cross-correlation of existing and acquired products, and
        provides significant operating leverage. See "Acquisitions."
 
ACQUISITIONS
 
     Medirisk believes the selective acquisition of complementary businesses
results in a more rapid expansion of its product line and customer base, and
enables it to leverage its sales and marketing organization. As a result,
Medirisk has invested significant resources to build the business platform
necessary to be a consolidator in the fragmented health care information
technology and services industry. Since its initial public offering in January
1997, Medirisk has acquired five companies that provide complementary products
and services. The Company believes the acquisition of these entities created
significant cross-selling opportunities among its respective product offerings,
increased its market share within existing product lines and provided product
and customer expansion opportunities.
 
     As part of a systematic approach to implementing its acquisition strategy,
Medirisk has corporate resources dedicated to identifying, analyzing and
pursuing targeted acquisition candidates. The Company currently is tracking a
database of more than 300 companies, of which more than 100 meet its primary
acquisition criteria for product type, revenue and customer base. Of primary
interest to Medirisk are: (i) health care information products focused on
benchmark and outcomes data; (ii) software products that assist in data
collection and analysis; (iii) health care consulting firms; and (iv) products
that assist in the delivery and use of Medirisk's databases.
 
     Medirisk believes that its existing infrastructure, in combination with
management's experience in acquiring and integrating new companies and products,
will facilitate the continued successful implementation of its acquisition
strategy.
 
PRODUCTS AND SERVICES
 
     Medirisk provides products and services designed to enable its customers to
measure and assess the performance of health care services in the United States
and to forecast the supply of and demand for health care services. At the core
of the Company's products and services are several proprietary databases. The
detailed nature of Medirisk's databases provides precise data that customers can
use to address specific decision-making needs and offers the Company's customers
competitive advantages. Medirisk also provides decision-support software tools
that enhance the utility of its database products, as well as customized
analytical services. The Company's flexible product design enables customers to
license the specific information they need based on variables such as geographic
region, medical specialty, clinical procedure and timeframe.
 
     Medirisk has developed its databases and decision-support software for ease
of use and frequently updates its databases to ensure that its products are as
accurate and current as possible. All of the Company's decision-support software
is Microsoft Windows(R)-based and is compatible with a variety of hardware and
software applications. The Company's databases can be imported into standard
software programs including Microsoft Excel(R), Lotus 1-2-3(R), FoxPro(R),
Quattro Pro(R), Dbase(R) and others, and can be imported and exported to
separate decision-support and practice administration programs provided by
companies such as HBO & Company, Medic Computer Systems, Inc., Shared Medical
Systems Corporation, IDX Systems Corporation, Medical Manager Corporation and
Transition Systems, Inc.
 
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<PAGE>   5
 
  MARKET PERFORMANCE PRODUCTS
 
     Medirisk's market performance products provide customers with comprehensive
proprietary data and decision support tools for use in analyzing physician fees,
health care utilization patterns and member satisfaction with managed care plans
in the United States. The following is a description of the Company's primary
market performance products:
 
     CareData Reports(TM).  CareData Reports are reports that are created
utilizing information accumulated and analyzed by the Company regarding consumer
satisfaction with managed health care. Based on this data, CareData Reports rank
specific health plans. Comparative market analysis is available for 26
geographic markets and 170 health plans. To collect data used in CareData
Reports, the Company conducts health care consumer surveys that are sponsored by
approximately 400 major employers and measure member satisfaction with
approximately 150 aspects of managed health care. The Company's CareData Reports
product line is utilized by health plans to assess their competitive position
and quality of care, by employers to evaluate health plans and by pharmaceutical
companies to target potential markets for their products.
 
     HealthPac(R).  HealthPac is a database that includes current year estimates
and five-year forecasts of health care utilization, supply and demand in
specific geographic markets across the United States. HealthPacs data sets
include demographic information concerning 369 separate geographic areas,
population-based models of the incidence or prevalence of diseases by category,
estimates of the demand for health care services by treatment setting and
estimates of the supply of local providers able to meet the identified demand.
 
     Avenir(R).  Avenir is a Windows(R)-based decision-support application that
integrates HealthPacs data sets with reporting, mapping and graphics software.
Avenir allows hospitals, health plans and other health care industry
participants to conduct detailed market analysis, forecasting and strategic
planning.
 
     Medirisk(SM) Physician Fee Database.  The Physician Fee Database reports
reimbursement rates for medical procedures for various types of payors and
specific geographic markets across the United States. The Physician Fee Database
provides data concerning reimbursement levels that providers are accepting from
managed care plans and other payors, rather than fees charged by those
providers, a distinction critical to an accurate understanding of market
conditions. Fee data in the Physician Fee Database are tracked by the AMA's CPT
codes, which define all current medical procedures, and are segregated into 287
separate market areas in the United States (compared to 89 market areas that
were tracked by HCFA in 1997). Medirisk believes that the Physician Fee Database
divides the United States into more geographic markets than most competing
products, thereby allowing customers to make more precise fee decisions. A
customer can license data for a specific market, state or region or for the
entire United States.
 
     Medirisk(SM) Procedure Utilization Database.  The Procedure Utilization
Database provides frequently updated utilization data for all medical procedures
included in the Company's Physician Fee Database. This database can be used to
model the anticipated utilization of a specific service for a certain population
profile. The database is offered on a state-specific basis and can be adjusted
for age and gender.
 
     Medirisk(TM) Capitation Manager.  Capitation Manager is a Windows(R)-based
decision-support application that integrates Medirisk's Physician Fee Database
and Procedure Utilization Database and calculates capitation rates based on
customer-provided pricing and demographic assumptions. Using Capitation Manager,
the customer enters the demographic profile of a group proposed to be covered in
a capitated arrangement, the services to be provided and proposed capitated
pricing for those services. Using these assumptions in combination with the
Company's databases, Capitation Manager calculates the expected utilization of
the services to be provided and compares the proposed capitated pricing to
managed care, fee-for-service, Medicare and other fee benchmarks tracked by the
Company within a specific market.
 
  CLINICAL PERFORMANCE PRODUCTS
 
     Medirisk offers clinical performance products that enable customers to
measure clinical outcomes across a full range of care within a variety of
medical specialties. Clinical outcomes are generally defined as the change in a
patient's health status as a result of therapy or care delivered by a health
care professional. Clinical outcomes are measured empirically using standard
health status scales to assess the patient prior to the
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delivery of therapy or care, while such care is being delivered and after
treatment is terminated. The data included in these products are gathered by
Company-certified clinicians, automated patient information systems and
Medirisk's patient interview staff using the Company's standardized outcomes
scales. Comparing customer data with norms derived from Medirisk's database,
Medirisk prepares reports detailing customers' clinical performance based on a
number of independent measures including patient acuity, medical and functional
improvement, resource utilization, length of stay/duration of treatment, cost of
treatment and patient satisfaction. Medirisk's clinical performance products
assist both payors and providers with (i) measuring and predicting outcomes of
treatment regimens; (ii) making normalized comparisons of facilities and
providers; (iii) establishing benchmarks for clinical quality improvement; (iv)
developing standards for clinical practice; (v) generating analytical reports
for communicating with customers and their constituents; and (vi) substantiating
quality for managed care contracting and accreditation needs.
 
     Medirisk markets its clinical performance products primarily to health care
providers, and its products are currently available to track clinical outcomes
in rehabilitation, ambulatory surgery, orthopaedics, occupational health, pain
management, neurological care, wound care, respiratory care, nutrition and
infection therapy.
 
     In March 1997, Medirisk's clinical performance products were listed on the
Joint Commission on Accreditation of HealthCare Organizations' ("JCAHO") roster
of vendors who have acceptable clinical performance measurement systems to
support ORYX, JCAHO's new accreditation initiative. The ORYX initiative requires
health care organizations to select an outcomes measurement standard from
JCAHO's list of acceptable performance measurement systems in order to receive
JCAHO accreditation. The ORYX initiative currently covers hospitals, long-term
care organizations, integrated delivery networks, health plans and
provider-sponsored organizations.
 
  PHYSICIAN CREDENTIALS PRODUCTS
 
     Medirisk provides database products, software and outsourced services
designed to enable its customers to access detailed information concerning the
background and credentials of physicians in the United States. The Company's
physician credentials products facilitate its customers' ability to establish or
improve physician recruiting efforts on a cost-effective basis, develop health
care networks and market the provider component of health care services.
Medirisk's physician credentials products also aid hospital and managed care
customers in verifying the credentials of physicians and other providers with
whom they work. Hospitals, managed care organizations and other health care
industry participants are required to verify and periodically re-verify such
credentials in order to maintain accreditation by organizations such as the
National Committee for Quality Assurance ("NCQA") and JCAHO. The Company's
credentials service has successfully completed all 10 of the audits of
credentialing processes conducted by NCQA. The Company's physician database is
comprised in part of physician data from the AMA's Physician MasterFile. All
physician information is further validated and enhanced by personal telephone
interviews with the physicians that are conducted by members of Medirisk's
staff. Current products include:
 
     Provider Credential Verification Report(TM).  The Provider Credential
Verification Report is a report that provides customers with an efficient and
cost-effective means to verify electronically the key professional credentials
of participating health care practitioners using primary source data. When
joined with the Company's electronic processing of a National Practitioner
Database and/or Federation of State Medical Boards query, and written
verification of a practitioner's hospital privileges, malpractice insurance
coverage and claims history, the Provider Credential Verification Report becomes
the central component of the Company's credential and verification service.
 
     PrimeSource(TM).  PrimeSource is a credential verification database
provided in CD-ROM format. This database is an accurate, cost-effective way to
verify a physician's credentials. PrimeSource includes records for the
following: state licenses and sanctions; Drug Enforcement Agency registrations
and sanctions; US medical school education records from 1979 to the present; US
residency program training records from 1983 to the present; board
certifications from the American Board of Medical Specialties; Medicare
Universal Provider Identification Numbers; and Medicare and Medicaid sanctions.
PrimeSource is updated quarterly, and customers are billed only for the reports
they generate.
 
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     PracticeMatch(TM).  PracticeMatch is a Windows(R)-based decision-support
software system that provides in-house physician recruiters with on-line access
to the Company's physician database. By establishing a series of search and
selection criteria, customers obtain information about physicians who satisfy
specified criteria. The customer can then print or download the information for
use in building in-house databases, generating recruiting status reports and
tracking recruiting expenses associated with specific candidates. The
PracticeMatch product is constructed from proprietary records of approximately
135,000 physicians developed in part from data in the AMA's Physician
MasterFile.
 
DATA ACQUISITION METHODOLOGY
 
     In designing its products and services, Medirisk emphasizes quality and
ease of use. Medirisk uses proprietary data engineering methodologies to
standardize and interpret data in order to ensure that its products are as
comprehensive, accurate and current as possible. The detailed nature of the
Company's databases provides precise data that customers can use to address
their specific decision-making needs. Furthermore, Medirisk's data engineering
methodologies are designed to ensure that its databases are free of bias. The
resulting objectivity of Medirisk's products and services allows the Company to
market its products to a broad range of health care industry participants and
improves the credibility of its databases as benchmarking tools.
 
     The Company collects data for inclusion in its databases and related
products in a variety of ways, including its customer data collection program
and its regular surveys of managed care organizations, providers, employers and
consumers. To encourage customers to participate in some components of its data
collection program, Medirisk offers price discounts in return for access to
customers' raw claims data and other health care transaction records. Medirisk's
surveys are conducted on a regular basis, with special surveys conducted from
time to time to address new issues and emerging trends. Once the data are
collected, Medirisk's database personnel clean and analyze the data before they
are included in the Company's databases. Medirisk uses proprietary processes to
validate data by standardizing, normalizing and formatting the submitted data
and then applies its database methodologies to segment the data.
 
     Medirisk's databases are regularly updated to reflect changes in the
industry and, in the case of its market performance and clinical performance
databases, to take into consideration secondary factors such as co-morbidity,
case mix and demographics. These attributes permit customers to compare
objectively their financial and clinical performance to industry or
customer-specific benchmarks contained in the Company's databases with
specificity and precision.
 
     Market Performance Products.  The data used in Medirisk's market
performance products have been collected through (i) Medirisk's customer data
collection program, whereby customers provide their medical claims or other
health care transaction data to the Company on a regular basis, (ii) surveys of
more than 1,600 managed care organizations, (iii) purchases of certain data
sets, and (iv) maintenance of a customer-support database. Included in the
Physician Fee Database and Procedure Utilization Database are approximately
three billion private sector transaction records, including actual managed care
transaction data and negotiated fee schedules. While Medirisk's market
performance databases include public-sector data, they focus primarily on
private-sector data derived from transaction data and clinical records
contributed by Medirisk's customers and obtained from other sources. These
private- and public-sector data are not commingled, thus permitting more precise
benchmarking of data relevant to the private health care marketplace. The
Company believes that private-sector data are more useful for comparative
purposes than public-sector data and that Medirisk's comprehensive compilation
of private-sector data represents a competitive advantage for the Company. For
the Company's CareData Reports products, Medirisk conducts annual patient
surveys regarding consumer satisfaction with managed care. These surveys are
sponsored by approximately 400 major employers and measure member satisfaction
with approximately 150 aspects of managed care including satisfaction with
provider panels, pharmacy benefit management and overall health plan design. For
the Company's HealthPac database, Medirisk collects demographic, market supply
and utilization data from publicly available sources or purchases or licenses
data from their source.
 
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     Clinical Performance Products.  Medirisk obtains data for its clinical
outcomes databases from its clinical outcomes customers and other
Company-certified sources. To facilitate collection of outcomes measurements,
the Company provides its customers with data-collection tools that are tailored
to the customer's clinical record-keeping environment. Medirisk collects the
data through customer submission, automated patient information systems and
direct patient interviews conducted by the Company's clinical interview staff.
Data collection software or optical scan forms are used to collect data directly
from the clinician in the absence of automated patient systems. To enhance the
reliability and integrity of customer-submitted data, Medirisk will include in
its outcomes database only information received from customer-affiliated
clinicians who are trained and certified by Medirisk in rating patient
performance and in data-collection protocols.
 
     Physician Credentials Products.  The data included in Medirisk's physician
credentials credentialing products are obtained from publicly available sources
or are licensed, leased or purchased from the source of the data. Sources of
data for credentialing products include state medical boards, the Drug
Enforcement Agency, HCFA, the American Board of Medical Specialties, the
American Association of Medical Colleges and the National Association of Social
Workers. The data used in Medirisk's physician credentials recruiting products
are collected from publicly available sources and the AMA Physician MasterFile,
and are verified by personal telephone interviews with each physician. Medirisk
employs professional interview personnel who contact physicians directly, gather
the required information, record the information in the automated database and
send a hard copy to each physician for verification. The Company believes that
the fact that each physician profiled in the Company's recruiting database has
personally verified the information and knows that he or she is tracked in the
database ensures the highest quality profile and offers a significant
competitive advantage over unverified databases. In addition, the Company is the
exclusive licensee of the AMA to share and enhance portions of the AMA's
Physician MasterFile. This relationship greatly enhances the quality and
availability of information about practicing physicians.
 
CUSTOMERS
 
     The unbiased nature of Medirisk's databases enables the Company to market
its products to a wide range of health care industry participants, including
managed care plans, indemnity insurers, integrated delivery systems, hospitals,
specialty health care providers, physician practice management companies,
physician practices, consulting firms, equipment suppliers and pharmaceutical
firms. None of the Company's customers, other than HEALTHSOUTH Corporation
accounted for a material amount of the Company's revenues in 1997. Most of
Medirisk's major customers, which are defined as generating annualized revenue
of more than $5,000, license products in only one of the product areas offered
by the Company. Medirisk has approximately 1,000 major customers that in the
aggregate account for more than 90% of the Company's revenue.
 
PRODUCT DELIVERY
 
     The Company's products are delivered to customers on CD-ROM, diskette,
magnetic tape, on-line access or hard copy depending upon customer preference.
Medirisk believes that there are readily available alternative sources of supply
for all of the media on which its products are delivered.
 
COMPETITION
 
     Medirisk faces intense competition in providing health care information
products and services. Competitors vary in size, scope and breadth of product
and service offerings. The Company competes with different competitors in each
of its target markets, and certain of such competitors have substantially
greater resources than those of the Company. In addition, several large
horizontally integrated information services companies, including Dow Jones, IMS
Healthcare, First Data Corporation, National Data Corporation, United Healthcare
and Thomson Publishing, have developed and are marketing information products
and services to the health care industry. The Company believes that it is likely
that one or more of such companies may become more direct competitors of the
Company either by acquiring existing competitors or by developing and marketing
their own products. Many of these larger companies are engaged in the processing
of health care claims and, thus, have access to substantial claims- and
cost-related data from which they could build
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competing databases or which they could license to other competitors of the
Company. The Company also competes with the internal information resources and
systems of certain of its prospective and existing customers. The Company
believes that the principal competitive factors in its target markets include
the breadth and quality of database and applications offerings, access to
proprietary data, the proprietary nature of methodologies and technical
resources, price and the effectiveness of marketing and sales efforts.
 
EMPLOYEES
 
     On March 24, 1998, the Company had 209 full-time employees. Of these, 19
were corporate personnel, 34 were sales and marketing personnel and 156 were
involved in operations and product development. None of the Company's employees
is covered by a collective bargaining agreement. The Company considers relations
with its employees to be good.
 
ITEM 2.  PROPERTIES
 
     Medirisk's corporate headquarters occupy approximately 16,000 square feet
of an office building located in Atlanta, Georgia, under a lease expiring in
March 1999, with one optional five-year renewal term. Medirisk also leases
office space in Chicago, Illinois; St. Louis, Missouri; Rockville, Maryland; New
York, New York; and St. Paul, Minnesota. The Company believes that such offices
are adequate for the Company's current requirements.
 
ITEM 3.  LEGAL PROCEEDINGS
 
     The Company is involved in various claims arising in the normal course of
business. In the opinion of management of the Company, although the outcomes of
these claims are uncertain, in the aggregate they are not likely to have a
material adverse effect on the Company's business, financial condition and
results of operations.
 
ITEM 4.  SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS
 
     No matter was submitted to a vote of the Company's security holders during
the quarter ended December 31, 1997.
 
                                    PART II
 
ITEM 5.  MARKET FOR THE REGISTRANT'S COMMON EQUITY AND RELATED
         STOCKHOLDER MATTERS
 
     The Common Stock is quoted on the Nasdaq National Market under the symbol
"MDMD." The following table sets forth the high and low sales prices for the
Common Stock for the quarters indicated as reported on the Nasdaq National
Market.
 
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                                                                 PRICE RANGE
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<S>                                                           <C>       <C>
FISCAL YEAR ENDED DECEMBER 31, 1997:
  Fourth Quarter............................................  $12.250   $10.250
  Third Quarter.............................................   10.875     7.375
  Second Quarter............................................    8.375     6.250
  First Quarter (from January 28, 1997).....................   10.500     7.625
</TABLE>
 
     The last reported sale price of the Common Stock on the Nasdaq National
Market on March 24, 1998 was $22.50 per share. As of March 24, 1998 the Company
had 31 stockholders of record.
 
     The Company has not declared or paid any cash dividends or distributions on
its Common Stock since 1991. It is the policy of the Company's Board of
Directors to retain earnings to support operations and to finance continued
growth of the Company rather than to pay dividends. Payments of future
dividends, if any,
 
                                        8
<PAGE>   10
 
will be at the discretion of the Company's Board of Directors. The Credit
Agreement between the Company and NationsBank N.A. contains restrictions on the
payment of dividends. See "Management's Discussion and Analysis of Financial
Condition and Results of Operations."
 
     In June 1997, in connection with, and as partial consideration for, the
acquisition of CIVS, Inc., the Company issued 129,166 shares of Common Stock to
various shareholders of CIVS, Inc. In August 1997, in connection with, and as
partial consideration for, the acquisition of CareData Reports, Inc., the
Company issued 14,516 shares of Common Stock to various shareholders of CareData
Reports, Inc. All of such transactions were conducted without an underwriter or
other placement agent, and the Company claims that all of such transactions were
exempt from registration under the Securities Act pursuant to Section 4(2) of
the Securities Act.
 
                                        9
<PAGE>   11
 
ITEM 6.  SELECTED FINANCIAL DATA
 
     The selected consolidated financial data presented below as of and for the
years ended December 31, 1993, 1994, 1995, 1996 and 1997 have been derived from
the audited consolidated financial statements of the Company and its
subsidiaries. The consolidated financial statements and related notes as of
December 31, 1996 and 1997 and for each of the years in the three-year period
ended December 31, 1997, together with the related report of KPMG Peat Marwick
LLP, independent certified public accountants, are included elsewhere in this
Form 10-K. As a result of the Company's acquisitions of CIVS, Inc., CareData
Reports, Inc. and Medsource, Inc. and certain assets of Staff-Link, Inc.
(collectively, the "1997 Acquisitions") and its acquisition of
Healthdemographics in 1998, the Company's historical financial statements are
not representative of financial results to be expected for future periods. The
selected consolidated financial data should be read in conjunction with
"Management's Discussion and Analysis of Financial Condition and Results of
Operations" and the Consolidated Financial Statements of the Company and Notes
included elsewhere in this Prospectus.
 
<TABLE>
<CAPTION>
                                                               YEAR ENDED DECEMBER 31,
                                                   -----------------------------------------------
                                                    1993      1994      1995      1996      1997
                                                   -------   -------   -------   -------   -------
                                                        (IN THOUSANDS, EXCEPT PER SHARE DATA)
<S>                                                <C>       <C>       <C>       <C>       <C>
STATEMENTS OF OPERATIONS DATA:
Revenue..........................................  $ 2,447   $ 2,894   $ 3,655   $ 8,904   $16,749
Salaries, wages and benefits.....................    1,675     1,893     2,578     6,093     7,910
Other operating expenses.........................      507       731       956     2,314     4,374
Depreciation and amortization....................       75       143       193       787     1,304
Acquired in-process research and development
  costs and integration costs(1).................       --        --        --     6,180     4,575
                                                   -------   -------   -------   -------   -------
Operating income (loss)..........................      190       127       (72)   (6,470)   (1,414)
Interest income (expense), net...................      (41)      (54)      (66)     (703)      345
Other income (expense)...........................       18        --        --       (57)       --
Provision for income taxes.......................       --        --        --        --      (707)
                                                   -------   -------   -------   -------   -------
Income (loss) before extraordinary item..........      167        73      (138)   (7,230)   (1,776)
Extraordinary item: loss on early extinguishment
  of debt(1)(2)..................................       --        --        --        --      (806)
                                                   -------   -------   -------   -------   -------
Net income (loss)................................  $   167   $    73      (138)   (7,230)   (2,582)
                                                   =======   =======
Accretion of discount on Series A convertible
  preferred stock................................                          (92)       --        --
Convertible preferred stock dividend
  requirement....................................                         (202)     (202)      (25)
                                                                       -------   -------   -------
  Net loss attributable to common stock..........                      $  (432)  $(7,432)  $(2,607)
                                                                       =======   =======   =======
Loss per common share -- basic and diluted(3):
  Loss per share before extraordinary item.......                      $ (0.30)  $ (4.84)  $ (0.46)
  Loss per share -- extraordinary item...........                           --        --     (0.21)
                                                                       -------   -------   -------
     Net loss per share of common stock..........                      $ (0.30)  $ (4.84)  $ (0.67)
                                                                       =======   =======   =======
Weighted average number of common shares used in
  calculating net loss per share of common
  stock -- basic and diluted(3)..................                        1,427     1,536     3,918
                                                                       =======   =======   =======
</TABLE>
 
                                       10
<PAGE>   12
 
<TABLE>
<CAPTION>
                                                               YEAR ENDED DECEMBER 31,
                                                   -----------------------------------------------
                                                    1993      1994      1995      1996      1997
                                                   -------   -------   -------   -------   -------
                                                        (IN THOUSANDS, EXCEPT PER SHARE DATA)
<S>                                                <C>       <C>       <C>       <C>       <C>
BALANCE SHEET DATA:
Working capital (deficit)........................  $    33   $   321   $   197   $(2,495)  $ 4,181
Total assets.....................................    1,035     1,111     1,263     8,456    20,658
Long-term debt and capital lease obligations
  excluding current portion......................      127       172       151     7,195       165
Redeemable preferred stock.......................    1,838     2,210     2,302        --        --
Stockholders' equity (deficit)...................   (1,714)   (1,928)   (2,333)   (4,823)   16,184
</TABLE>
 
---------------
 
(1) In connection with the 1997 Acquisitions, the Company recorded non-recurring
    charges related to acquired in-process research and development costs and
    planned integration costs. Excluding these charges and the extraordinary
    loss, operating income, net income and income per common share -- diluted
    for the year ended December 31, 1997 would have been $3.2 million, $2.1
    million, and $0.45, respectively. See "Management's Discussion and Analysis
    of Financial Condition and Results of Operations" and Note 2 of Notes to
    Consolidated Financial Statements of the Company.
(2) As a result of the application of a portion of the net proceeds of the
    Company's initial public offering to repay indebtedness, the Company
    incurred a one-time, non-recurring, non-cash charge of $806,000 with respect
    to accelerated amortization of original issue discount on certain Senior
    Subordinated Notes and related deferred financing costs. Due to the
    Company's losses, no income tax benefit was applied to the extraordinary
    loss presented.
(3) Computed on the basis described in Note 1 of Notes to Consolidated Financial
    Statements of the Company. Historical losses for 1993 and 1994 per share are
    not presented as they are not meaningful due to the mandatory conversion of
    all outstanding shares of the Company's Series A and Series B Convertible
    Preferred Stock into Common Stock which occurred upon completion of the
    Company's initial public offering in January 1997.
 
ITEM 7.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
         OF OPERATIONS
 
     The following discussion should be read in conjunction with the more
detailed information and consolidated financial statements and accompanying
notes, as well as the other financial information appearing elsewhere in this
Prospectus. Except for historical information, the following discussion contains
forward-looking statements that involve risks and uncertainties. The Company's
actual results could differ materially from those discussed herein. Factors that
could cause or contribute to such differences include, but are not limited to,
those discussed in "Management's Discussion and Analysis of Financial Condition
and Results of Operations -- Forward Looking Statements."
 
OVERVIEW
 
     Medirisk is a provider of proprietary database products, decision-support
software and analytical services to the health care industry. The Company's
products and services enable its customers to make objective comparisons of the
financial costs and clinical outcomes of physician services to customer-specific
and industry benchmarks, assess member satisfaction with specific managed care
plans, and obtain information concerning the background and credentials of
physicians. These capabilities assist health care industry participants in
measuring the performance of health care payors and providers and forecasting
the supply of and demand for health care services.
 
     Applications of Medirisk's products include pricing managed care contracts,
evaluating physician fee schedules and utilization of physician services,
comparing provider outcomes and health plan performance, credentialing and
recruiting physicians, developing health care delivery networks, and marketing
health care services. The Company actively sells its products to over 1,000
major customers, including leading health plans, insurers, hospitals, large
multi-specialty physician groups, physician practice management companies,
 
                                       11
<PAGE>   13
 
employers, equipment suppliers and pharmaceutical companies, as well as several
hundred smaller customers, including single-specialty physician groups. Medirisk
believes that it is the leading provider of clinical and financial database
products comprised of physician-oriented content and managed care member
satisfaction information in the United States.
 
ACQUISITIONS
 
     Following the completion of its initial public offering in January 1997,
Medirisk significantly expanded its operations by acquiring five companies. The
acquisition of businesses with complementary products and services has broadened
the Company's customer base, created additional cross-selling opportunities,
increased market share within existing products and resulted in new product
extensions and enhancements. The following summarizes these recent transactions.
 
     -  In May 1997, Medirisk acquired substantially all of the assets of
        Staff-Link, Inc. ("Staff-Link") of St. Louis, Missouri, a provider of a
        physician database and related software utilities designed to assist
        health care organizations with their in-house recruiting efforts.
        Staff-Link's customer base increased the market share of the Company's
        physician credentials products.
 
     -  In June 1997, Medirisk acquired CIVS, Inc. ("CIVS") of Rockville,
        Maryland, a leading national provider of physician credentialing
        services and information products to health care organizations. The
        acquisition of CIVS added new customers to the Company's physician
        credentials product line and broadened the range of products and
        outsourced services offered by the Company.
 
     -  In August 1997, Medirisk acquired CareData Reports, Inc. ("CareData") of
        New York, New York, which creates reports analyzing consumer
        satisfaction with more than 150 aspects of managed health care plans and
        ranks specific health plans accordingly. CareData's products are used by
        managed care plans to assess their competitive position and quality of
        care, by employers to evaluate health plans and by pharmaceutical
        companies to target potential markets for their products.
 
     -  In November 1997, Medirisk acquired Medsource, Inc. ("Medsource") of St.
        Paul, Minnesota, which licenses databases of physician information for
        use in recruiting physicians and developing health care networks. The
        acquisition strengthened the Company's physician credentials product
        line and extended the application of these products to the
        administrative and the marketing functions of health care organizations.
 
     -  In March 1998, Medirisk acquired Healthdemographics of San Diego,
        California, which provides databases and decision-support applications
        to forecast the supply of and demand for health care services. Health
        care delivery organizations, insurers, equipment suppliers, consultants
        and other health care industry participants use the proprietary
        demographic and market segmentation information and software provided by
        Healthdemographics to make more informed business decisions regarding
        strategic planning and market planning and analysis. The acquisition of
        Healthdemographics resulted in an expansion of the Company's market
        performance products and customer base.
 
     In connection with these acquisitions, the Company acquired intangible
assets which are being amortized over various useful lives. The amortization
periods are based on, among other things, the nature of the products and
markets, the competitive position of the acquired companies and the adaptability
to changing market conditions of the acquired companies.
 
     Also in connection with the 1997 Acquisitions and the acquisition of
Healthdemographics, the Company recorded non-recurring charges related to
in-process research and development costs of $3.1 million for CIVS, $975,000 for
CareData, $300,000 for Medsource and $5.3 million for Healthdemographics. The
amount of each of these non-recurring charges was equal to the estimated current
fair value, based on the adjusted cash flows (discounted by a risk-adjusted
weighted average cost of capital of 24% for CIVS and CareData, 28% for
Healthdemographics and 29% for Medsource), of specifically identified
technologies for which technological feasibility had not yet been established
pursuant to Statement of Financial Accounting Standards No. 86, "Accounting for
the Costs of Computer Software to be Sold, Leased or Otherwise Marketed" and for
which
                                       12
<PAGE>   14
 
future alternative uses did not exist. Similar charges could result in the
future as a result of additional acquisitions accounted for as purchases. The
Company incurred approximately $200,000 of integration costs during 1997, and
approximately $65,000 of such costs during the first quarter of 1998, for the
1997 Acquisitions. The Company estimates that it will incur integration costs of
approximately $400,000 in 1998 in connection with the acquisition of
Healthdemographics.
 
     As a result of the 1997 Acquisitions and the acquisition of
Healthdemographics, the Company's historical financial statements are not
representative of financial results to be expected for future periods. See Note
2 of Notes to Consolidated Financial Statements of the Company.
 
SOURCES OF REVENUE
 
     The Company provides services and licenses its products primarily pursuant
to single- and multi-year contracts that provide for the payment of
non-refundable annual fees, often in advance of use or shipment, or of quarterly
fees that are generally billed in advance of service delivery. The products are
segregated into three types: market performance, clinical performance and
physician credentials products. The market performance products provide
customers with information from the Company's market performance product
databases. Revenue on these sales is recognized upon the delivery of the data.
The Company also licenses the exclusive right to market the results of its
managed care consumer satisfaction surveys. Revenue from the licenses of
disease-specific customized surveys to the pharmaceutical industry is recognized
as the related costs of producing the survey are incurred, and revenue from
non-customized data licensing is recognized upon delivery. The clinical
performance products revenues relate to the delivery of services and are
recognized over the contract terms as the services are provided. The physician
credentials products consist of (i) data and services provided to customers over
time, for which revenue is recognized ratably over the life of the contract, and
(ii) credentials reports that validate physicians' education, training and other
matters, for which revenue is recognized upon delivery of the completed reports.
Customer service revenues are recognized ratably over the service contract
period. All other revenue, including fees for training, consulting and other
miscellaneous services, is recognized upon the performance of the applicable
services.
 
     The Company's three groups of products contribute varying percentages of
the Company's total revenue from quarter to quarter based on a variety of
factors, including, without limitation, the timing and size of acquisitions and
the differences in seasonality among the groups of products. Of its total
revenue for the year ended December 31, 1997, the Company derived approximately
37% from market performance products, approximately 20% from clinical
performance products and approximately 43% from physician credentials products.
Of its total revenue for the quarter ended March 31, 1998, the Company derived
approximately 47% from market performance products, approximately 14% from
clinical performance products and approximately 39% from physician credentials
products.
 
     The Company's revenue is composed of both recurring revenue from the
Company's current customer base as well as revenue from new customers. The
Company defines its recurring revenue percentage with respect to any particular
period as the quotient, expressed as a percentage, of (i) revenue recognized
during such period from a sale of a product to a customer who purchased a
similar product in the prior period divided by (ii) the Company's total revenue
in the prior period. In determining its recurring revenue percentage, the
Company includes in its revenue the revenue of entities acquired during the
period as if such acquisitions had occurred at the beginning of the prior
period. The Company does not include revenue in its recurring revenue percentage
to the extent that such revenue exceeds total revenue in the prior period. The
Company's recurring revenue percentage has been in excess of 70% for each of the
last four years and for the first quarter of 1998.
 
                                       13
<PAGE>   15
 
RESULTS OF OPERATIONS
 
     The following table sets forth, for the periods indicated, the percentage
of revenue represented by the respective items.
 
<TABLE>
<CAPTION>
                                                               YEAR ENDED DECEMBER 31,
                                                              -------------------------
                                                              1995      1996      1997
                                                              -----     -----     -----
<S>                                                           <C>       <C>       <C>
STATEMENTS OF OPERATIONS:
Revenue.....................................................   100%      100%      100%
Salaries, wages and benefits................................    71        69        47
Other operating expenses....................................    26        26        26
Depreciation and amortization...............................     5         9         8
Acquired in-process research and development costs and
  integration costs.........................................    --        69        27
                                                               ---       ---       ---
Operating loss..............................................    (2)      (73)       (8)
Interest income (expense), net..............................    (2)       (8)        2
Other expense...............................................    --        --        --
Provision for income taxes..................................    --        --        (4)
Extraordinary item -- loss on early extinguishment of
  debt......................................................    --        --        (5)
                                                               ---       ---       ---
Net loss....................................................    (4)%     (81)%     (15)%
                                                               ===       ===       ===
</TABLE>
 
  YEAR ENDED DECEMBER 31, 1997 COMPARED TO YEAR ENDED DECEMBER 31, 1996
 
     Revenue.  Revenue in 1997 was $16.7 million, an increase of $7.8 million or
88% over 1996. The increase was primarily attributable to the acquisitions of
CIVS and CareData, effective in June 1997 and August 1997, respectively. Revenue
recognized by CIVS, CareData and the other 1997 Acquisitions represented
approximately $4.7 million, or 60% of the total increase. The Company's revenue
without the impact of the revenue from the 1997 Acquisitions increased 35% for
1997 over 1996 as a result of a combination of factors, including significant
increases in the volume of patient discharges with the Company's largest
customer, HealthSouth, the revenue of PracticeMatch, which was acquired in March
1996, whose revenues were not included in the Company's revenues for the entire
year in 1996, and increases in the volume of products licensed attributable to
an increase in the Company's sales and marketing personnel. The volume increase
was principally attributable to licenses to new and existing customers for
existing products and product extensions.
 
     Salaries, wages and benefits.  Salaries, wages and benefits in 1997 were
$7.9 million, an increase of $1.8 million or 30% over 1996. This increase was
primarily the result of the acquisitions of CIVS and CareData and growth in the
revenues of the Company's other business units. Salaries, wages and benefits
decreased as a percentage of revenue during 1997 to 47% as compared to 69% in
1996. This decrease resulted primarily from leveraging the Company's existing
administrative, sales and marketing personnel as revenue increased through both
acquisitions and internal growth.
 
     Other operating expenses.  Other operating expenses in 1997 were $4.4
million, an increase of $2.1 million or 89% over 1996, principally as a result
of the acquisitions of CIVS and CareData. Other operating expenses remained
generally consistent at approximately 26% of revenue in 1997 and 1996.
 
     Depreciation and amortization.  Depreciation and amortization in 1997 was
$1.3 million, an increase of $517,000 or 66% over 1996. This increase resulted
primarily from the 1997 Acquisitions. As a percentage of revenue, depreciation
and amortization for 1997 and 1996 was 8% and 9%, respectively.
 
     Acquired in-process research and development costs and integration
costs.  In connection with the 1997 Acquisitions, the Company acquired the
ongoing research and development activities of each entity and incurred certain
integration expenses. At the effective date of each acquisition the Company
recorded non-recurring charges resulting from expensing acquired in-process
research and development costs. In 1997,
 
                                       14
<PAGE>   16
 
the acquired in-process research and development costs and integration costs
totaled $4.6 million, or 27% of revenue.
 
     Interest income (expense), net.  Net interest income in 1997 was $345,000,
an increase of $1.0 million over 1996. The increase was a result of the
extinguishment of debt with the proceeds of the Company's initial public
offering and the interest income earned on the net proceeds of that offering.
 
  YEAR ENDED DECEMBER 31, 1996 COMPARED TO YEAR ENDED DECEMBER 31, 1995
 
     Revenue.  Revenue in 1996 was $8.9 million, an increase of $5.2 million or
144% over 1995. The increase was primarily attributable to the acquisitions of
Formations in Health Care, Inc. ("Formations") and PracticeMatch, Inc.
("PracticeMatch") effective in January and March 1996, respectively. Revenue
recognized by these acquired companies represented approximately $4.9 million,
or 93% of the total increase. The Company's revenue without the impact of the
revenue from the acquired companies increased 9% for 1996 over 1995 as a result
of a combination of factors, including increases in the volume of financial
products licensed and revenue attributable to an increase in the Company's sales
and marketing personnel. The volume increase was principally attributable to
licenses to new and existing customers as a result of product enhancements and
extensions.
 
     Salaries, wages and benefits.  Salaries, wages and benefits in 1996 were
$6.1 million, an increase of $3.5 million or 136% over 1995. This increase was
primarily the result of the acquisitions of Formations and PracticeMatch and, to
a lesser extent, growth in the Company's administrative, sales and marketing
infrastructure. Salaries, wages and benefits decreased as a percentage of
revenue in 1996 to 69% as compared to 71% in 1995. This decrease resulted
primarily from leveraging the Company's administrative, sales and marketing
personnel as revenue increased through both acquisitions and internal growth.
 
     Other operating expenses.  Other operating expenses in 1996 were $2.3
million, an increase of $1.4 million or 142% over 1995, principally as a result
of the acquisition of Formations and PracticeMatch. Other operating expenses
remained constant at approximately 26% of revenue in 1996 and in 1995.
 
     Depreciation and amortization.  Depreciation and amortization in 1996 was
$787,000, an increase of $593,000 or 307% over 1995. This increase resulted from
the acquisitions of Formations and PracticeMatch. As a percentage of revenue,
depreciation and amortization for 1996 and 1995 was 9% and 5%, respectively.
 
     Acquired in-process research and development costs.  In connection with the
acquisition of Formations and PracticeMatch, the Company acquired the ongoing
research and development activities of each entity. At the effective date of
each acquisition the Company recorded non-recurring charges resulting from
expensing acquired in-process research and development costs. These charges
totaled $6.2 million, or 69% of revenue, in 1996.
 
     Interest income (expense), net.  Net interest expense in 1996 was $703,000,
an increase of $638,000 or 975% over 1995. The increase was a result of interest
due on senior subordinated notes issued during 1996 to finance the acquisition
of PracticeMatch as well as interest expense on the acquisition notes issued to
the sellers of PracticeMatch.
 
                                       15
<PAGE>   17
 
QUARTERLY RESULTS OF OPERATIONS
 
     The following table sets forth certain unaudited quarterly financial data
of the Company for 1996 and 1997. In the opinion of the Company's management
this unaudited information has been prepared on the same basis as the audited
information and includes all adjustments necessary to present fairly the
information set forth therein. The operating results for any quarter are not
necessarily indicative of results for any future period:
 
<TABLE>
<CAPTION>
                                       1996 QUARTER ENDED                        1997 QUARTER ENDED
                             --------------------------------------    --------------------------------------
                             MAR. 31   JUN. 30   SEPT. 30   DEC. 31    MAR. 31   JUN. 30   SEPT. 30   DEC. 31
                             -------   -------   --------   -------    -------   -------   --------   -------
                                                              (IN THOUSANDS)
<S>                          <C>       <C>       <C>        <C>        <C>       <C>       <C>        <C>
STATEMENTS OF OPERATIONS:
Revenues...................  $ 1,577   $2,297     $2,380    $2,650     $2,650    $ 3,243    $4,677    $6,179
Salaries, wages and
  benefits.................    1,121    1,637      1,630     1,705      1,762      1,718     2,036     2,394
Other operating expenses...      356      650        579       729        646        894     1,309     1,525
Depreciation and
  amortization.............       96      226        228       237        201        249       352       502
Acquired in-process
  research and development
  costs....................    6,180       --         --        --         --      3,100     1,064       411
                             -------   ------     ------    ------     ------    -------    ------    ------
Operating income (loss)....   (6,176)    (216)       (57)      (21)        41     (2,718)      (84)    1,347
Interest income (expense),
  net......................      (52)    (214)      (216)     (221)        41        157       103        44
Other expense..............       --      (37)        (3)      (17)        --         --        --        --
Provision for income
  taxes....................       --       --         --        --         --         --        --      (707)
                             -------   ------     ------    ------     ------    -------    ------    ------
Income (loss) before
  extraordinary item.......   (6,228)    (467)      (276)     (259)        82     (2,561)       19       684
Extraordinary item.........       --       --         --        --       (806)        --        --        --
                             -------   ------     ------    ------     ------    -------    ------    ------
Net income (loss)..........  $(6,228)  $ (467)    $ (276)   $ (259)    $ (724)   $(2,561)   $   19    $  684
                             =======   ======     ======    ======     ======    =======    ======    ======
</TABLE>
 
     The Company's quarterly revenues and operating results have varied
significantly in the past. Quarterly results have fluctuated as a result of a
variety of factors including but not limited to the following: the Company's
sales cycle; staffing changes in the Company's sales and marketing organization;
changes in the Company's resources; demand for the Company's products; the
timing of significant new customer contracts; the non-renewal of significant
customer contracts; the timing of acquisitions; competitive conditions in the
industry; changes in customer budgets; and general economic factors.
Furthermore, the Company has experienced a seasonal pattern in its operating
results, with a greater proportion of the Company's revenue and operating
profitability occurring in the second half of the year. The Company attributes
this seasonality to a combination of factors including budgeting and other
factors affecting the health care industry generally, the compounding effect of
historical renewal schedules (which typically results in greater license
renewals in the third and fourth quarters) and internal staffing and growth
issues. The Company believes the licensing and subsequent renewal pattern of its
market performance products are more seasonal than its other products and
expects the addition of new products, including those from acquisitions, to
moderate, but not end, this seasonal effect.
 
     A significant portion of the Company's expenses are relatively fixed, and
the amount and timing of increases in such expenses are based in large part on
the Company's expectations concerning future revenue. If revenues are below
expectations in any given quarter, the adverse effect may be magnified by the
Company's inability to adjust spending quickly enough to compensate for the
revenue shortfall. Accordingly, even a small variation from expected revenue
could have a material adverse effect on the Company's results of operations for
a given quarter.
 
SOFTWARE CAPITALIZATION
 
     In addition to acquisitions, the Company seeks to expand its product
offerings through internal product development. Prior to 1996, the Company
expensed internal development costs due to the nominal costs incurred between
technological feasibility and product release. In 1997 the Company began
capitalizing
 
                                       16
<PAGE>   18
 
internal product development costs which were incurred after technological
feasibility had been established and prior to general product release.
Capitalized software development costs net of accumulated amortization totaled
$1.0 million at December 31, 1997.
 
INCOME TAXES
 
     The Company recorded income tax expense of $707,000 during 1997 due to
limitations on the utilization of net operating loss carryforwards and the
nondeductability of certain acquired in-process research and development costs
to offset taxable income. At December 31, 1997, the Company had net operating
loss carryforwards of approximately $1.9 million for federal income tax
purposes. The net operating loss carryforwards expire beginning in 2006 through
2011. The total gross deferred tax asset was approximately $3.5 million as of
December 31, 1997 and has been reduced to zero by a valuation allowance and
offsetting deferred income tax liabilities of approximately $1.0 million.
 
     Deferred tax assets and liabilities are determined based on differences
between the financial reporting and the tax bases of assets and liabilities and
are measured using the enacted tax rates and laws that will be in effect when
the differences are expected to reverse. Applying the provisions of SFAS 109 to
the Company, particularly considering the Company's history of net losses, the
Company was unable to support a conclusion consistent with SFAS 109 that it is
more likely than not that it will generate future taxable income during the loss
carryforward periods; therefore, the Company has provided a full valuation
allowance against its net deferred tax assets. In determining that a valuation
allowance was required, management primarily considered such factors as the
Company's history of operating losses and expected near-term future losses and
earnings, the nature of the Company's deferred tax assets, the absence of
significant excess of appreciated asset value over the tax basis of the
Company's net assets, the absence of taxable income in prior carryback years and
the potential for deferred tax assets resulting from future business
acquisitions. Although management's operating plans assume taxable and operating
income in future periods, historical performance has produced an accumulated
deficit of $12.4 million at December 31, 1997. Consequently, the Company has
provided a full valuation allowance against its net deferred tax assets until
such time as the Company produces sufficient taxable and operating income to
support a lower valuation allowance.
 
     At December 31, 1997, the Company had net operating loss carryforwards of
approximately $1.9 million, which expire beginning in 2006 through 2011. Under
Internal Revenue Code Section 382, the Company's use of net operating loss
carryforwards is limited to approximately $1.1 million per year as a result of
the Company's initial public offering completed in January 1997 (see Note 8(h)
of Notes to Consolidated Financial Statements). Approximately $1.0 million of
the net operating loss at December 31, 1997 relates to loss carryforwards
acquired in connection with the 1997 Acquisitions. Accordingly, such losses are
limited to income generated by the acquired entity as well as substantial annual
limitations.
 
LIQUIDITY AND CAPITAL RESOURCES
 
     The Company completed its initial public offering of Common Stock in
January 1997 and received approximately $22.6 million in net proceeds.
Approximately $9.1 million of these net proceeds were used to repay a senior
subordinated note and certain notes issued in connection with the Company's
acquisition of PracticeMatch, to pay accrued dividends on the Company's Series A
and Series B Convertible Preferred Stock and to repay a bridge loan provided by
NationsBank. In 1997, the Company used $11.4 million of the remaining net
proceeds of its initial public offering for working capital and general
corporate purposes, including the funding of the 1997 Acquisitions and
development of new products.
 
     In March 1997, NationsBank and the Company entered into a Credit Agreement
under which a $10.0 million revolving credit facility (the "NationsBank
Revolver") is available to the Company. The NationsBank Revolver is secured by
substantially all of the Company's assets. Under the terms of the NationsBank
Revolver the Company may, subject to customary terms, conditions and covenants,
borrow up to $10.0 million to fund working capital needs, new product
development and acquisitions. The Credit Agreement for the NationsBank Revolver
provides for interest at varying rates based on LIBOR and NationsBank's prime
rate and will mature on March 28, 1999. Under the terms of the NationsBank
Revolver, the Company is subject to
 
                                       17
<PAGE>   19
 
various restrictive covenants regarding, among other things, payment of any
dividends, capital expenditures limitations, incurrence of indebtedness from
others in excess of certain amounts, and consummation of certain mergers and
acquisitions without the consent of NationsBank. Financial covenants include,
but are not limited to, maintaining debt to capitalization ratios, minimum net
worth ratios, debt service coverage ratios and cash flow leverage ratios. No
amounts were outstanding under the Credit Agreement during 1997.
 
     The Company currently has no specific plans with respect to the use of the
remaining $2.1 million of the net proceeds of its initial public offering or the
NationsBank Revolver, and the Company's cash flow from operations has generally
been sufficient to fund the liquidity needs of the Company other than
acquisitions and new product development. The Company anticipates that
borrowings under the NationsBank Revolver and the remaining net proceeds of the
initial public offering will be used principally for working capital and general
corporate purposes, for potential acquisitions of complementary businesses or
products in the health care information industry and for the development of
additional products. Pending the application of the remaining net proceeds of
its initial public offering, the Company has invested such proceeds in
short-term, interest-bearing, investment-grade securities.
 
     In January 1996, the Company and HealthPlan Services Corporation ("HPSC")
entered into a Securities Purchase Agreement, under which HPSC purchased 280,623
shares of Series B Convertible Preferred Stock for $2.0 million and agreed to
purchase up to $10.0 million in original principal amount of Senior Subordinated
Notes. In connection with the issuance of the Senior Subordinated Notes, the
Company agreed to issue warrants to purchase up to 432,101 shares of Common
Stock for $0.015 per share. In March 1996, the Company issued $6.9 million in
original principal amount of the Senior Subordinated Notes to HPSC and warrants
to purchase 298,150 shares of Common Stock. (In February 1998, these warrants
were exercised.) The Company used $1.5 million of the proceeds from the sale of
Series B Convertible Preferred Stock to complete the acquisition of Formations.
Medirisk used approximately $5.4 million of the proceeds from the issuance of
the Senior Subordinated Notes to complete the acquisition of PracticeMatch. In
addition, in connection with the PracticeMatch acquisition, the Company issued
acquisition notes to the sellers in an aggregate principal amount of $1.1
million. The HPSC Senior Subordinated Notes, a NationsBank bridge loan and the
acquisition notes were repaid in full upon the completion of the Company's
initial public offering in January 1997. Upon such repayment HPSC's obligation
to purchase additional Senior Subordinated Notes terminated.
 
     The Company had working capital of $4.2 million as of December 31, 1997 as
compared to a working capital deficit of $2.5 million as of December 31, 1996.
This increase is primarily due to the receipt of the net proceeds of the
Company's initial public offering.
 
     Net cash used by operating activities totaled $697,000 for the year ended
December 31, 1997, as compared $762,000 for the prior year. The decrease in cash
used of $65,000 was primarily the result of the timing of customer payments.
 
     Net cash used in investing activities was approximately $9.3 million for
the year ended December 31, 1997, as compared to $7.3 million for the prior
year. In 1996, $7.0 million was used to fund the acquisitions of Formations and
PracticeMatch, while, in 1997, $7.4 million was used to fund the 1997
Acquisitions. The remaining $1.9 million of net cash used in investing
activities in the year ended December 31, 1997 was used to fund fixed asset
purchases and software development.
 
     Net cash provided by financing activities was $13.1 million for the year
ended December 31, 1997, as compared to $8.2 million for the same period in the
prior year. As previously discussed, in 1997 the Company retained $13.5 million
of the net proceeds from its initial public offering, and the cash provided in
1996 resulted from the net proceeds under the HPSC Securities Purchase
Agreement.
 
     The Company believes that the remaining proceeds of its initial public
offering, borrowings under the NationsBank Revolver and cash generated from
operations will be sufficient to meet the capital expenditure and working
capital needs for the Company's operations for the near term. The Company's
future liquidity and cash requirements will depend on a wide range of factors,
including costs associated with development of new products, enhancements of
existing products and acquisitions. Although the Company has no present
 
                                       18
<PAGE>   20
 
commitments or agreements regarding acquisitions, the Company's strategy is to
acquire additional complementary products and businesses. If the remaining
proceeds of the initial public offering, borrowings under the NationsBank
Revolver and cash flow from operations are not sufficient to fund such
acquisitions, the Company will be required to seek additional financing, and
there can be no assurance that such financing will be available in amounts and
on terms acceptable to the Company.
 
RECENT ACCOUNTING PRONOUNCEMENT
 
     In June 1997, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards No. 130 ("SFAS 130"), "Reporting Comprehensive
Income" and Statement of Financial Accounting Standards No. 131 ("SFAS 131"),
"Disclosures About Segments of an Enterprise and Related Information." SFAS 130
established standards for reporting and display of comprehensive income and its
components. Comprehensive income generally includes all changes in equity during
a period except those resulting from investments by owners and distribution to
owners. There was no impact on the Company's consolidated financial statements
with the adoption of SFAS 130. SFAS 131 established standards for reporting
information about operating segments in annual financial statements and in
interim financial reports to shareholders. The Company adopted both statements
in the first quarter of 1998; however, the provisions of SFAS 131 need not be
applied to interim periods in the initial year of application.
 
     In October 1997, the Accounting Standards Executive Committee issued
Statement of Position 97-2, Software Revenue Recognition ("SOP 97-2"). SOP 97-2
is effective for financial statements for fiscal years beginning after December
15, 1997. The Company does not expect that adoption of SOP 97-2 will
significantly affect its results of operations.
 
     In March 1998, the Accounting Standards Executive Committee issued
Statement of Position 98-1, Accounting for the Costs of Computer Software
Developed or Obtained for Internal Use ("SOP 98-1"). SOP 98-1 is effective for
financial statements for fiscal years beginning after December 15, 1998. The
Company does not expect that adoption of SOP 98-1 will significantly affect its
results of operations.
 
YEAR 2000 COMPLIANCE
 
     Both the Company's internal operations and products use a significant
number of computer software programs and operating systems. Given the
information known at this time about the Company's systems and products, coupled
with the Company's ongoing efforts to maintain systems and products as
necessary, the Company does not anticipate that the year 2000 issue or related
costs will have a material adverse effect on the Company's business, results of
operations or financial condition. The Company has conducted an analysis of the
databases and software applications it licenses to customers as well as those
used in its internal operations and believes that the costs related to
addressing the year 2000 issue will not be material. The Company continues to
analyze its databases and software applications and analyzes year 2000
compliance issues before acquiring companies.
 
     The Company is analyzing year 2000 issues as they relate to its key
suppliers of data and key customers. If a supplier of data encounters year 2000
issues that it is unable to address, such supplier's data could be unavailable
to the Company. If a customer encounters year 2000 issues that it is unable to
address, such customer may determine not to license the Company's databases or
software applications.
 
     The Company's analysis of year 2000 issues, particularly as they relate to
its key suppliers of data and key customers, is ongoing, and to the extent the
databases or systems of the company, key suppliers of data or key customers are
not fully year 2000 compliant, there can be no assurance that the costs
necessary to update databases or software or potential systems interruptions,
interruptions in the supply of data or interruptions in demand for the Company's
products would not have a material adverse effect on the Company's business,
results of operations or financial condition.
 
                                       19
<PAGE>   21
 
EFFECTS OF INFLATION
 
     Management does not believe that inflation has had a material impact on
results of operations for the periods presented. Substantial increases in costs,
particularly the cost of labor for product development, marketing and sales,
could have an adverse impact on the Company's business, operating results and
financial condition.
 
FORWARD-LOOKING STATEMENTS
 
     The Company may from time to time make written or oral forward-looking
statements contained in the Company's filings with the Securities and Exchange
Commission (the "Commission") and its reports to stockholders. Statements made
in this Annual Report on Form 10-K, other than those concerning historical
information, should be considered forward-looking and subject to various risks
and uncertainties. Such forward-looking statements are made based on
management's belief, as well as on assumptions made by, and information
currently available to, management, and are made pursuant to, and in reliance
upon, the "safe harbor" provisions of the Private Securities Litigation Reform
Act of 1995. The Company's actual results may differ materially from the results
anticipated in these forward-looking statements due to numerous factors,
including the following: History of Operating Losses and Uncertain
Profitability; Risks Related to Growth; Risks of Integration of Acquired
Operations; Dependence on Data Sources and AMA Licenses; Dependence on
Intellectual Property Rights; Risks Related to Intangible Assets and Acquisition
of In-process Research and Development; Uncertainty and Consolidation in the
Health Care Industry; Risks of Rapid Technological Change; Need for Additional
Financing; Competition; Risks of Customer Concentration; Potential for System
Defects; Dependence on Key Personnel; Variable Quarterly Operating Results and
Seasonality; Possible Volatility of Stock Price; Potential Adverse Effects of
Substantial Number of Shares Eligible for Future Sale; Year 2000 Compliance;
Adverse Impact of Anti-takeover Provisions; Risks Associated with Unspecified
Use of Proceeds; and No Dividends. For a more complete discussion of these
factors, please see the section entitled "Risk Factors" in the Company's
Registration Statement on Form S-3, as amended, as originally filed with the
Commission on April 13, 1998 Registration Number 333-50015.
 
ITEM 8.  FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA
 
     Reference is made to the consolidated financial statements of Medirisk and
its subsidiaries, consisting of the Consolidated Balance Sheets as of December
31, 1997 and 1996, and the related Consolidated Statements of Operations,
Consolidated Statements of Stockholders' Equity and Consolidated Statements of
Cash Flows for each of the three years in the three-year period ended December
31, 1997, together with the Notes to Consolidated Financial Statements. SEE
SECTION F, OF THIS REPORT, WHICH INFORMATION IS INCORPORATED INTO THIS ITEM 8 BY
REFERENCE.
 
                                       20
<PAGE>   22
 
ITEM 9.  CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND
         FINANCIAL DISCLOSURE
 
     None.
 
                                    PART III
 
ITEM 10.  DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT
 
     The following table sets forth certain information with respect to the
executive officers, directors and director nominees of the Company.
 
<TABLE>
<CAPTION>
NAME                                                AGE                  POSITION
----                                                ---                  --------
<S>                                                 <C>   <C>
Mark A. Kaiser....................................  40    Chairman of the Board, Chief Executive
                                                            Officer and President
Kenneth M. Goins, Jr..............................  39    Executive Vice President and Chief
                                                            Financial Officer
Thomas C. Kuhn....................................  35    Vice President -- Finance and
                                                            Administration
O. B. Rawls.......................................  47    Senior Vice President and Group General
                                                            Manager
Keith O. Cowan(2).................................  41    Director
Michael J. Finn(1)................................  48    Director
William M. McClatchey, M.D(1).....................  49    Director
James K. Murray, III(1)...........................  35    Director
Robert P. Pinkas(2)...............................  44    Director
</TABLE>
 
---------------
 
(1) Member of the Audit Committee of the Board of Directors.
(2) Member of the Compensation Committee of the Board of Directors.
 
     Mark A. Kaiser joined the Company in 1991 and has served as Chairman of the
Board, Chief Executive Officer and President of the Company. Mr. Kaiser has been
a director of the Company since 1991. Prior to being recruited to Medirisk, Mr.
Kaiser's experience included senior and executive management positions in sales
and marketing for health care and technology companies. Before joining Medirisk,
Mr. Kaiser was Vice President of Sales and Marketing for Charter Medical
Corporation, the nation's largest chain of psychiatric hospitals. Mr. Kaiser was
Senior Vice President of Marketing at TelecomUSA, where he worked from the early
stages of the company until its acquisition by MCI Communications Corporation.
Mr. Kaiser was involved in TelecomUSA's acquisition and consolidation of more
than 50 companies, and he co-managed the consolidation of the TelecomUSA
customer base onto standard MCI products. Mr. Kaiser holds Bachelor of Science
degrees in Computer Science and Mathematics from Furman University.
 
     Kenneth M. Goins, Jr., has served as Vice President, Finance and
Administration and Chief Financial Officer of the Company from joining Medirisk
in April 1996 until December 1996 when he was elected Executive Vice President.
Prior to joining the Company from 1985 until April 1996, Mr. Goins served in
various capacities with First Data Corporation ("FDC") and its predecessors
First Financial Management Corporation ("FFMC") and MicroBilt Corporation
("MBC"). From 1995 until April 1996, Mr. Goins was Vice President of Financial
Planning and Analysis for FDC, a major financial information services company
based in Atlanta. FDC acquired FFMC in October of 1995, where Mr. Goins served
as Vice President of Financial Planning and Analysis from June 1994 until
October 1995. During the last half of his tenure at FFMC and FDC, Mr. Goins also
served as Chief Financial Officer for Unified Merchant Services, a credit card
processing joint venture with NationsBank. From 1985 until June 1994, when it
was acquired by FFMC, Mr. Goins was an officer of MBC. He served at various
times as the Executive Vice President, Chief Financial Officer and Controller of
MBC, an Atlanta-based computer software services company, from 1985 through its
initial public offering and until MBC was acquired by FFMC. While at MBC and
FFMC, Mr. Goins was
 
                                       21
<PAGE>   23
 
involved in a number of acquisitions in the information and software industries.
Prior to his employment with MBC, Mr. Goins was employed in various capacities
by Colonial Life and Accident Insurance Company, based in Columbia, South
Carolina. Mr. Goins holds a Bachelor of Science degree in Business
Administration from the University of South Carolina and is a Licensed Certified
Public Accountant.
 
     Thomas C. Kuhn has been Controller of the Company since he joined the
Company in 1996. Mr. Kuhn was appointed principal accounting officer of the
Company in March 1998, after having been appointed Vice President -- Finance and
Administration of the Company in August 1997. Prior to joining the Company, from
1992 to 1996 Mr. Kuhn served in various capacities with FDC and its predecessors
FFMC and MBC. From May 1995 until joining the Company in May 1996, Mr. Kuhn was
Vice President of Working Capital Management for FFMC as well as having
additional financial planning and analysis responsibilities with FDC. From March
1992 until May of 1995, Mr. Kuhn served as Controller of MBC. Prior to his
employment at MBC, Mr. Kuhn was in public accounting with Clayton, Miller and
Company in Atlanta, Georgia, from August 1987 until March 1992, and with Arthur
Young and Company in Atlanta, Georgia, from September of 1984 until August 1987.
Mr. Kuhn holds a Bachelor of Science degree in Business Administration from the
University of South Carolina and is a Licensed Certified Public Accountant.
 
     O.B. Rawls has been Senior Vice President and Group General Manager of the
Company since he joined the Company in December 1997. Prior to joining the
Company, from April 1995 to December 1997, Mr. Rawls held several positions with
First Data Corporation; his most recent being from June 1997 until December 1997
as General Manager International Partnership in which he negotiated and
implemented an international merchant processing joint venture. Mr. Rawls served
as President of Unified Merchant Services, a credit card processing joint
venture with NationsBank. From 1983 until 1995, Mr. Rawls was an executive with
NationsBank and its predecessor NCNB National Bank, his final position being
Senior Vice President/Division Executive of Merchant Card Services for
NationsBank from 1993 until 1995. Mr. Rawls holds a Bachelor of Science Degree
from East Carolina University and an Executive Masters of Business
Administration from Queens College.
 
     Keith O. Cowan has been a Director of the Company since 1997. Mr. Cowan has
served as Vice President -- Corporate Development for BellSouth Corporation
since May 1996. He is responsible for managing the merger and acquisition
activities of BellSouth and its subsidiaries, including the identification of
acquisition candidates, and the structuring and negotiation of transactions.
Prior to joining BellSouth, Mr. Cowan was associated with Alston & Bird, a law
firm based in Atlanta, Georgia, for 14 years, becoming a partner in the firm in
1990. His experience included the representation of public and private clients
in corporate and securities transactions. During his last five years at Alston &
Bird, Mr. Cowan specialized in the health care and insurance industries. Alston
& Bird is the Company's legal counsel. Mr. Cowan holds a Bachelor of Arts degree
from the University of North Carolina and a Juris Doctor degree from the
University of Virginia.
 
     Michael J. Finn has been a Director of the Company since 1992. Mr. Finn is
President and a Director of Brantley Capital Corporation, a publicly-traded
closed-end investment company ("BCC"), and is President and a director of
Brantley Capital Management, Ltd., investment advisor to BCC ("BCM"). Since
1995, Mr. Finn has also served as a general partner of the general partners of
Brantley Venture Partners II, L.P. ("BVP II") and Brantley Venture Partners III,
L.P. ("BVP III"), venture capital firms located in Cleveland, Ohio. From 1987 to
1995, Mr. Finn was Vice President of the Venture Capital Group of Sears
Investment Management Co. in Chicago, Illinois. Mr. Finn is also a director of
Rhomas Group, Inc., Silvon Software, and Pediatric Services of America, Inc. Mr.
Finn has been an active investor in small businesses since 1976 and holds
Bachelor of Science degree in Urban Planning and Master of Science degrees in
Land Economics and Finance from Michigan State University.
 
     William M. McClatchey, M.D., F.A.C.P., F.A.C.R. has been a Director of the
Company since 1997. Dr. McClatchey is a physician practicing in Atlanta,
Georgia, specializing in primary care internal medicine and rheumatology. Dr.
McClatchey has practiced medicine at the Piedmont Clinic in Atlanta since 1979.
Dr. McClatchey was a member of the Board of Directors of BankSouth Corporation,
N.A., and served as Chairman of its Community Development Committee. He is a
member of the American College of
 
                                       22
<PAGE>   24
 
Physicians, serving on its Committee on Medical Informatics from 1986 until 1992
and as Chairman of that committee from 1990 to 1992. Dr. McClatchey was a member
of the Health Policy Advisory Committee of the Center for Strategic and
International Studies in 1993 and served as Chairman of the Study Group on
Preventive Health and Infrastructure in 1993. Dr. McClatchey is President and
serves on the Board of Trustees of Georgia Health Decisions, Inc. a
community-based not-for-profit organization working for comprehensive health
care reform in Georgia. Dr. McClatchey is a member of the Georgia Coalition for
Health, a 32-member group charged by Governor Zell Miller to devise a proposal
to reform Georgia's Medicaid program. In addition, Dr. McClatchey is a member of
the Board of Directors and Executive Committee of the Georgia Health Policy
Center at Georgia State University and a member of the Information Systems
Steering Committee for Promina Health System, Atlanta, Georgia.
 
     James K. Murray, III, has been a Director of the Company since January
1996. Since December, 1997, Mr. Murray has been Executive Vice President and
Chief Financial Officer of Sykes HealthPlan Services, Inc. ("SHPS"), a joint
venture between HealthPlan Services Corporation and Sykes Enterprises,
Incorporated. SHPS is an information technology company that provides a full
complement of benefits outsourcing services to companies worldwide. From 1995
until 1997, Mr. Murray was Executive Vice President and Chief Financial Officer
of HealthPlan Services Corporation, a Tampa, Florida-based health care services
company providing marketing, distribution, administrative and cost containment
services on behalf of health care payors. Prior to joining HealthPlan Services
from 1990 until October 1995, Mr. Murray was President and Chief Executive
Officer of Plant State Bank, a federally-insured commercial bank in Hillsborough
County, Florida. From 1985 to 1990, Mr. Murray was an accountant with Arthur
Andersen & Co. in Atlanta, Georgia. Mr. Murray is also on the board of directors
of DynaBit U.S.A., Inc., an international value added distributor of computer
parts and components. Mr. Murray holds a Bachelor of Science degree in
Accounting and a Master of Science degree in Finance from the University of
Virginia. Mr. Murray is a Licensed Certified Public Accountant.
 
     Robert P. Pinkas has been a Director of the Company since 1991. Mr. Pinkas
is currently Chairman of the Board, Chief Executive Officer, Treasurer and a
director of Brantley Capital Corporation. Mr. Pinkas was the founding partner of
Brantley Venture Partners, L.P., a venture capital fund started in 1987 ("BVP
I"). Mr. Pinkas also led the formation of BVP II and BVP III. He serves as a
general partner of the general partners of BVP I, BVP II, and BVP III and has
worked with these and related investment partnerships since 1981. Mr. Pinkas
currently serves as Chairman of the Board of Gliatech, Inc. as well as a
director of Quad Systems Corporation, Pediatric Services of America, Inc. and
Waterlink, Inc. Mr. Pinkas holds Bachelor of Arts degree in Government and a
Master of Science degree in History from Harvard University and a Juris Doctor
degree from the University of Pennsylvania.
 
     Under the terms of the Company's Bylaws, the members of the Board of
Directors are divided into three classes, each of which serves a term of three
years. Each class is to consist, as nearly as possible, of one-third of the
total number of directors. The terms of Messrs. Finn and Murray will expire in
1998, the terms of Messrs. Kaiser and Pinkas will expire in 1999, and the terms
of Mr. Cowan and Dr. McClatchey will expire in 2000.
 
COMPLIANCE WITH SECTION 16(A) OF THE SECURITIES EXCHANGE ACT OF 1934
 
     Section 16(a) of the Securities Exchange Act of 1934, as amended, requires
the Company's directors and executive officers, as well as persons who own more
than 10% of a registered class of the Company's equity securities, to file with
the Securities and Exchange Commission and the Nasdaq National Market initial
reports of ownership and reports of changes in ownership of Common Stock and
other equity securities of the Company. Executive officers, directors and
greater than 10% stockholders are required by the rules of the Securities and
Exchange Commission to furnish the Company with copies of all reports they file
under Section 16(a). To the Company's knowledge, based solely on review of the
copies of such reports furnished to the Company and written representations from
its executive officers and directors that no other reports were required, all
Section 16(a) filing requirements applicable to the Company's executive
officers, directors and greater than 10% beneficial owners were complied with by
such persons during the fiscal year ended December 31, 1997, except that: (i)
Mr. Finn failed to file a timely Form 4 Report with respect to his
                                       23
<PAGE>   25
 
purchase of 1,500 shares of Common Stock in January 1997; (ii) Mr. Goins failed
to file timely Form 4 Reports with respect to a purchase for the benefit of his
minor son of 100 shares of Common Stock in January 1997 and a purchase for the
benefit of his minor daughter of 100 shares of Common Stock in January 1997;
(iii) Dr. McClatchey failed to file timely Form 4 Reports with respect to the
following transactions: (a) a direct purchase of 10,000 shares of Common Stock
in January 1997, (b) a purchase in January 1997 of 10,000 shares of Common Stock
by a trust for the benefit of Dr. McClatchey's wife, of which Dr. McClatchey was
then a trustee, (c) two purchases in November 1997 each of 2,000 shares of
Common Stock by a trust for the benefit of Dr. McClatchey's adult son, of which
Dr. McClatchey is trustee, (d) a purchase in November 1997 of 2,000 shares of
Common Stock by a trust for the benefit of Dr. McClatchey's minor daughter, of
which Dr. McClatchey is trustee, and (e) the termination in December 1997 of a
trust for the benefit of Dr. McClatchey's wife, of which Dr. McClatchey had been
trustee, and the resulting disposition of 10,000 shares of Common Stock to Dr.
McClatchey's wife; and (iv) Mr. Pinkas failed to file timely a Form 4 Report
with respect to his purchase of 5,000 shares of Common Stock in January 1997.
 
ITEM 11.  EXECUTIVE COMPENSATION
 
EXECUTIVE COMPENSATION
 
     The following table presents certain summary information concerning
compensation paid or accrued by the Company for services rendered in all
capacities during the fiscal year ended December 31, 1997 for the Chief
Executive Officer of the Company and the Chief Financial Officer of the Company
and for Paul A. Rodwick, former Chief Operating Officer and Executive Vice
President of the Company, who resigned those positions in October 1997. The
Chief Executive Officer and the Chief Financial Officer of the Company and Mr.
Rodwick are referred to as the "Named Executive Officers." None of the other
executive officers of the Company received total annual salary and bonus in
excess of $100,000 in 1997.
 
                           SUMMARY COMPENSATION TABLE
 
<TABLE>
<CAPTION>
                                                              YEAR ENDED DECEMBER 31, 1997
                                                              ----------------------------
NAME AND PRINCIPAL POSITIONS                                   SALARY     BONUS     OTHER
----------------------------                                  --------   -------   -------
<S>                                                           <C>        <C>       <C>
Mark A. Kaiser..............................................  $200,500   $95,000        --
  Chairman of the Board, Chief Executive Officer and
  President
Kenneth M. Goins, Jr. ......................................  $141,711   $50,000        --
  Chief Financial Officer and Executive Vice President
Paul A. Rodwick.............................................  $157,611        --   $43,848(1)
  Former Chief Operating Officer and                                               $29,166(2)
  Executive Vice President
</TABLE>
 
---------------
 
(1) Represents value realized on options exercised during 1997. See "-- Fiscal
    Year End Option Exercises and Option Values."
(2) Represents amounts paid to Mr. Rodwick for consulting services provided to
    the Company following Mr. Rodwick's resignation.
 
                                       24
<PAGE>   26
 
                          OPTION GRANTS IN FISCAL 1997
 
     The following table presents certain summary information concerning options
granted to the Named Executive Officers in the fiscal year ending December 31,
1997:
 
<TABLE>
<CAPTION>
                                                                                  POTENTIAL REALIZABLE
                                             PERCENT OF                             VALUE AT ASSUMED
                                NUMBER OF      TOTAL                              ANNUAL RATES OF STOCK
                                  SHARES     OPTIONS TO                             APPRECIATION FOR
                                UNDERLYING   EMPLOYEES                                 OPTION TERM
                                 OPTIONS         IN       EXERCISE   EXPIRATION   ---------------------
NAME                             GRANTED      1997(2)      PRICE        DATE         5%          10%
----                            ----------   ----------   --------   ----------   ---------   ---------
<S>                             <C>          <C>          <C>        <C>          <C>         <C>
Mark A. Kaiser................    32,480(1)      11%      $ 7.500      6/02/07    $153,199    $388,236
Kenneth M. Goins, Jr..........    16,240(1)       6%      $ 7.625      3/21/07    $ 81,183    $202,618
                                  26,280(1)       9%      $10.500     11/07/07    $173,537    $439,777
Paul A. Rodwick...............    64,960(1)      23%      $ 7.625      3/21/07    $324,731    $810,474
</TABLE>
 
---------------
 
(1) All options become exercisable as to 20% of the subject shares on each
    anniversary of the date of grant.
(2) Does not include options issued under the Medirisk, Inc. Non Management
    Directors Stock Option Plan.
 
               FISCAL YEAR END OPTION EXERCISES AND OPTION VALUES
 
     The following table presents certain information concerning options
exercised by the Named Executive Officers in 1997 and the fiscal year-end value
of unexercised stock options held by the Named Executive Officers.
 
<TABLE>
<CAPTION>
                                                              NUMBER OF UNEXERCISED         VALUE OF UNEXERCISED
                                                                   OPTIONS AT              IN-THE-MONEY OPTIONS AT
                                    SHARES       VALUE        DECEMBER 31, 1997(#)         DECEMBER 31, 1997($)(2)
                                  ACQUIRED ON   REALIZED   ---------------------------   ---------------------------
NAME                              EXERCISE(#)    ($)(1)    EXERCISABLE   UNEXERCISABLE   EXERCISABLE   UNEXERCISABLE
----                              -----------   --------   -----------   -------------   -----------   -------------
<S>                               <C>           <C>        <C>           <C>             <C>           <C>
Mark A. Kaiser..................        --           --      123,424        68,858       $1,317,532      $470,505
Kenneth M. Goins, Jr. ..........        --           --        6,496        68,504       $   67,289      $337,114
Paul A. Rodwick.................    12,992      $43,848           --            --               --            --
</TABLE>
 
---------------
 
(1) Calculated by determining the difference between the fair market value of
    the securities underlying the option on the date of exercise and the
    exercise price of the options exercised by the Named Executive Officer.
(2) Calculated by determining the difference between the fair market value of
    the securities underlying the option at December 31, 1997 and the exercise
    price of the Named Executive Officers' options.
 
STOCK INCENTIVE PLANS
 
     Medirisk Stock Incentive Plan.  The Board of Directors of the Company
adopted and the stockholders of the Company approved the Medirisk, Inc. 1996
Stock Incentive Plan (the "1996 Incentive Plan"). Pursuant to the 1996 Incentive
Plan, awards are permitted to be granted in the form of non-qualified stock
options, incentive stock options, stock appreciation rights and shares of
restricted stock. In addition, the 1996 Incentive Plan provides for several
types of equity-based incentive compensation awards, namely performance units,
performance shares, phantom stock, unrestricted bonus stock and dividend
equivalent rights.
 
     The 1996 Incentive Plan is administered by the Compensation Committee of
the Board of Directors. The Compensation Committee determines the persons to
whom, and the times at which, awards will be granted, the type of awards to be
granted and all other related terms and conditions of the awards, subject to
certain limitations set forth in the 1996 Incentive Plan. All officers and key
employees of the Company and its affiliates are eligible to participate in the
Incentive Plan.
 
     A total of 580,645 shares of Common Stock are reserved for issuance
pursuant to the 1996 Incentive Plan. In the event of a Change in Control of the
Company (as defined in the 1996 Incentive Plan), stock incentives will become
fully vested without regard to the exercisability of the award or any other
conditions or restrictions. In connection with the Company's initial public
offering, the Company caused all then-existing
                                       25
<PAGE>   27
 
outstanding options (which had not been issued under any plan) to be surrendered
in exchange for options with identical terms issued under the 1996 Incentive
Plan. As of March 24, 1997, there were options for 523,023 shares of Common
Stock outstanding under the 1996 Incentive Plan, and 36,080 shares of Common
Stock are reserved for future issuance under the 1996 Incentive Plan.
 
     Medirisk, Inc. 1998 Qualified Employee Stock Purchase Plan.  The Company's
Board of Directors has adopted, subject to stockholder approval at the Annual
Meeting of Stockholders to be held in May 1998, the Medirisk, Inc. 1998
Qualified Employee Stock Purchase Plan (the "ESPP"). If approved by the
stockholders at the Company's Annual Meeting of Stockholders to be held in May
1998, the ESPP will be effective as of its adoption by the stockholders, and
payroll deductions under the ESPP will begin on July 1, 1998. The purpose of the
ESPP is to encourage employees of the Company and any participating subsidiaries
to acquire a proprietary interest, or to increase their existing proprietary
interest, in the Company. The ESPP will be administered by the Compensation
Committee.
 
     The total number of shares of Common Stock for which options may be granted
under the ESPP is 200,000 shares, subject to adjustment in accordance with the
ESPP. The ESPP permits participating employees to purchase shares of Common
Stock through payroll deduction for the lesser of (i) 85% of the fair market
value of the Common Stock on the first business day of an applicable purchase
period, or (ii) 85% of the fair market value of the Common Stock on the last
business day of the purchase period. Applicable purchase periods are the
calendar quarters of each fiscal year of the Company.
 
     Each employee of the Company and each employee of any designated subsidiary
corporation of the Company that has adopted the ESPP for the benefit of its
employees (the Company and each such other corporation being referred to herein
as a "Participating Company") is eligible to participate in the ESPP, provided
such employee: (i) is regularly scheduled to work at least 20 hours each week
and at least five months in the calendar year, and (ii) immediately after the
grant of an option to him under the ESPP would own less than five percent of the
total combined voting power or value of all classes of stock of the Company or
any of its subsidiaries. As of March 24, 1998, there were approximately 200
employees eligible to participate in the ESPP, but no shares or options had been
issued under the ESPP.
 
     Medirisk Non-Management Directors' Stock Option Plan.  The Medirisk, Inc.
Non-Management Directors' Stock Option Plan provides for the issuance of
non-qualified stock options to directors of the Company who are not employed by
or otherwise affiliated with the Company. A total of 100,000 shares of Common
Stock are reserved for issuance pursuant to the Directors' Plan. The effective
date of the Directors' Plan was January 28, 1997, the effective date of the
Company's initial public offering. As of March 24, 1997, there were options for
75,000 shares of Common Stock outstanding under the Incentive Plan.
 
     Medirisk, Inc. 1998 Long-Term Incentive Plan.  The Board of Directors of
the Company has adopted, subject to stockholder approval at the Company's Annual
Meeting of Stockholders to be held in May, 1998, the Medirisk, Inc. 1998
Long-Term Incentive Plan (the "Long-Term Incentive Plan"). If approved by the
stockholders at the Annual Meeting, the Long-Term Incentive Plan will be
effective as of its adoption by the stockholders, and awards may be made at any
time following such approval, although it is the Company's intention to grant
awards with respect to shares remaining available under the 1996 Incentive Plan
before granting awards under the Long-Term Incentive Plan. Pursuant to the
Long-Term Incentive Plan, awards are permitted to be granted in the form of
non-qualified stock options, incentive stock options, stock appreciation rights
and shares of restricted stock. In addition, the Long-Term Incentive Plan
provides for several types of equity-based incentive compensation awards, namely
performance units, performance shares, phantom stock, unrestricted bonus stock
and dividend equivalent rights.
 
     The Long-Term Incentive Plan will be administered by the Compensation
Committee of the Board of Directors. The Compensation Committee determines the
persons to whom, and the times at which, awards will be granted, the type of
awards to be granted and all other related terms and conditions of the awards,
subject to certain limitations set forth in the Long-Term Incentive Plan. All
directors, officers and key employees of the Company and its affiliates are
eligible to participate in the Long-Term Incentive Plan.
 
                                       26
<PAGE>   28
 
     A total of 500,000 shares of Common Stock will be reserved for issuance
pursuant to the Long-Term Incentive Plan. In the event of a Change in Control of
the Company (as defined in the Long-Term Incentive Plan), stock incentives will
become fully vested without regard to the exercisability of the award or any
other conditions or restrictions. As of March 24, 1997, there were no options or
other awards outstanding under the Long-Term Incentive Plan.
 
EMPLOYMENT AGREEMENT
 
     Mr. Mark A. Kaiser is a party to an employment agreement dated as of May
31, 1996 with Medirisk pursuant to which he serves as Chairman of the Board of
Directors, President and Chief Executive Officer of the Company. The agreement
is for an initial term of three years from the date of the agreement with
automatic one-year renewals thereafter, unless either party gives 60 days'
advance notice of nonrenewal. The agreement provides for an initial annual base
salary of $190,000, which may be increased annually at the discretion of the
Compensation Committee, and an annual target bonus equal to 50% of his base
salary for the applicable year, determined based upon Medirisk's performance
with respect to goals established by the Compensation Committee. Mr. Kaiser's
annual base salary was increased to $202,000 for 1997. Mr. Kaiser is also
entitled to participate in all of the Company's employee benefit plans. In
addition, under the agreement Mr. Kaiser was granted options to purchase up to
32,480 shares of Common Stock at $0.64 per share in 1996 and an additional
32,480 shares of Common Stock at $7.50 per share in May 1997. The agreement
provides that the Company shall grant Mr. Kaiser additional options to purchase
32,480 shares on May 31, 1998. These subsequent options will have an exercise
price equal to the fair market value of the Common Stock on May 31, 1998. All of
the options granted under the agreement vest ratably over five years from the
date of grant or immediately upon the sale or other change of control involving
the Company. Mr. Kaiser's agreement contains a nondisclosure covenant, as well
as covenants not to divert business or employees from the Company for one year
following termination. In the event Mr. Kaiser terminates his employment for
good reason, as defined in the agreement (which includes a voluntary termination
by Mr. Kaiser one year after a change of control involving the Company), or if
Medirisk terminates his employment other than for good cause, as defined in the
agreement, Mr. Kaiser shall be entitled to continue to receive his base salary
and all benefits until the later of May 31, 1999, or one year from the date of
termination.
 
COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION
 
     James K. Murray, III, a member of the Company's Board of Directors, who was
a member of the Compensation Committee from January 1, 1997 until February 7,
1997, is also an Executive Vice President and Chief Financial Officer of Sykes
HealthPlan Services, Inc., a joint venture between Health Plan Services
Corporation and Sykes Enterprises, Incorporated. Prior to Mr. Murray's joining
the Board of Directors, the Company and HPSC entered into a Securities Purchase
Agreement, (the "Securities Purchase Agreement") pursuant to which the Company
issued to HPSC 280,623 shares of Series B Convertible Preferred Stock for $2.0
million and Senior Subordinated Notes in an original principal amount equal to
$6.9 million at par. At that time, the Company and HPSC entered into a
Registration Rights Agreement giving HPSC certain demand and piggyback
registration rights, a Shareholders' Agreement and Warrant Agreement. In
February 1998 HPSC exercised its warrants under the Warrant Agreement and
obtained 298,150 shares of Common Stock for a nominal purchase price upon such
exercise. Pursuant to the Securities Purchase Agreement, HPSC has the right to
name one person to be nominated to the Company's Board of Directors so long as
HPSC owns or has the right to acquire at least 162,400 shares of Common Stock.
In connection with the Company's initial public offering, during 1997 the
Company paid $6.9 million to HPSC in repayment of the HPSC Senior Subordinated
Notes, and the Series B Convertible Preferred Stock was automatically converted
into 182,292 shares of Common Stock.
 
COMPENSATION OF DIRECTORS
 
     During 1997, each member of the Board of Directors who was not an employee
of the Company received (i) an annual retainer of $5,000; (ii) a fee of $1,000
for each meeting of the Board of Directors that he attended in person; (iii) a
fee of $250 for each meeting of the Board of Directors that he attended by
 
                                       27
<PAGE>   29
 
telephone; and (iv) a fee of $250 for each meeting of a committee of the Board
of Directors that he attended in person or by telephone.
 
ITEM 12.  SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT
 
     The following table sets forth certain information regarding the beneficial
ownership of the Company's Common Stock as of March 24, 1998: (i) by each person
known to the Company to beneficially own more than five percent of the
outstanding Common Stock; (ii) by each executive officer and director of the
Company; and (iii) by all executive officers and directors of the Company as a
group. Unless otherwise indicated, the business address of each person listed
below is care of Medirisk, Inc., Two Piedmont Center, Suite 400, 3565 Piedmont
Road, N.E., Atlanta, Georgia 30305.
 
<TABLE>
<CAPTION>
                                                                BENEFICIAL OWNERSHIP
                                                              -------------------------
NAME                                                           NUMBER     PERCENTAGE(1)
----                                                          ---------   -------------
<S>                                                           <C>         <C>
Brantley Venture Partners II, L.P...........................    522,745(2)     11.4%
  20600 Chagrin Boulevard
  Suite 1150 Tower East
  Cleveland, Ohio 44122
HealthPlan Services Corporation.............................    330,443         7.4
  3501 Frontage Road
  Tampa, Florida 33607
Mark A. Kaiser..............................................    396,022(3)      8.6
Kenneth M. Goins, Jr........................................     39,176(4)        *
Keith O. Cowan..............................................      4,333(5)        *
Michael J. Finn.............................................    527,728(6)     11.5
William M. McClatchey, M.D..................................     45,333(7)      1.0
James K. Murray, III........................................    333,776(8)      7.4
Robert P. Pinkas............................................    531,078(9)     11.5
Thomas C. Kuhn III..........................................      3,199(10)      *
O.B. Rawls..................................................         --          *
Laurence Powell.............................................    270,921         6.0
  P.O. Box 501085
  Atlanta, Georgia 31150
Robert Fleming Inc..........................................    287,600         6.4
  320 Park Avenue, 11th Floor
  New York, New York 10022
All directors and executive officers as a group (10
  members)..................................................  1,358,598        28.7
</TABLE>
 
---------------
 
   * Less than one percent.
 (1) Applicable percentages of ownership are based on 4,492,802 shares of Common
     Stock outstanding on March 24, 1998, adjusted as required by rules
     promulgated by the Securities and Exchange Commission (the "SEC"). This
     table is based upon information supplied by officers, directors and
     principal stockholders and Schedules 13D and 13G (if any) filed with the
     SEC. Unless otherwise indicated in the Footnotes to this table and subject
     to community property laws where applicable, the Company believes that each
     of the stockholders named in this table has sole voting and investment
     power with respect to the shares indicated as beneficially owned. Any
     security that any person named above has the right to acquire within 60
     days is deemed to be outstanding for purposes of calculating the percentage
     ownership of such person, but is not deemed to be outstanding for purposes
     of calculating the ownership percentage of any other person.
 (2) Includes warrants to purchase 97,440 shares of Common Stock.
 (3) Includes options to purchase 126,022 shares of Common Stock.
 (4) Includes (i) options to purchase 6,496 shares of Common Stock; and (ii) 200
     shares held by Mr. Goins' minor children.
 
                                       28
<PAGE>   30
 
 (5) Includes options to purchase 3,333 shares of Common Stock.
 (6) Includes (i) options to purchase 3,333 shares of Common Stock, (ii) 522,745
     shares owned by Brantley Venture Partners II, L.P. ("Brantley"). Mr. Finn
     is a partner of a partnership which is itself a general partner of Brantley
     and, as such, may be deemed to share voting and investment power with
     respect to the shares owned by Brantley. See Note 2 above.
 (7) Includes (i) options to purchase 3,333 shares of Common Stock; (ii) 10,000
     shares owned by Dr. McClatchey's wife; (iii) 4,000 shares owned by a trust
     for the benefit of Dr. McClatchey's adult child, of which Dr. McClatchey is
     trustee; and (iv) 2,000 shares owned by a trust for the benefit of Dr.
     McClatchey's minor child, of which Dr. McClatchey is trustee.
 (8) Includes (i) options to purchase 3,333 shares of Common Stock and (ii)
     330,443 shares owned by HealthPlan Services Corporation ("HPSC"). Mr.
     Murray was an executive officer of HPSC during a portion of 1997 and is
     currently an executive officer of an affiliate of HPSC and, as such, may be
     deemed to share voting and investment power with respect to the shares
     owned by HPSC.
 (9) Includes (i) options to purchase 3,333 shares of Common Stock, (ii) 522,745
     shares owned by Brantley Venture Partners II, L.P. ("Brantley"). Mr. Pinkas
     is a partner of a partnership which is itself a general partner of Brantley
     and, as such, may be deemed to share voting and investment power with
     respect to the shares owned by Brantley. See Note 2 above.
(10) Includes options to purchase 1,299 shares of Common Stock.
 
ITEM 13.  CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS
 
     See the section above entitled "Compensation Committee Interlocks and
Insider Participation."
 
                                    PART IV
 
ITEM 14.  EXHIBITS, FINANCIAL STATEMENT SCHEDULES AND REPORTS ON FORM 8-K
 
     (a) Documents incorporated by reference or filed with this report:
 
          (1) Financial Statements.
 
              The Financial Statements of the Company are listed in Item 8 of
              Part II. (See Section F.)
 
          (2) Financial Statement Schedules.
 
              Independent Auditors' Report
              Schedule II -- Valuation and Qualifying Accounts
              (See Section S)
 
          (3) Exhibits Incorporated by Reference or Filed with this Report.
 
     The exhibits listed below are filed with or incorporated by reference into
this Annual Report on Form 10-K. The exhibits that are identified with an
asterisk (*) were previously filed as part of, and are hereby incorporated by
reference from, the Company's Registration Statement on Form S-1 (No. 333-12311)
filed with the Commission on September 19, 1996 and effective on January 28,
1997. Unless otherwise indicated the exhibit number corresponds to the exhibit
number incorporated by reference. ITEMS LISTED IN BOLDFACE CONSTITUTE MANAGEMENT
CONTRACTS OR COMPENSATORY PLANS OR ARRANGEMENTS.
 
<TABLE>
<CAPTION>
EXHIBIT
NUMBER                           DESCRIPTION OF EXHIBITS
-------                          -----------------------
<C>       <C>  <S>
  2.1      --  Agreement and Plan of Merger dated as of August 27, 1996,
               between Medirisk, Inc., a Florida corporation and Medirisk,
               Inc., a Delaware corporation.*
  2.2      --  Stock Purchase Agreement dated as of November 22, 1995,
               between the Company and Pamella L. Leiter*
  2.3      --  Stock Purchase Agreement dated as of March 8, 1996, between
               the Company, Joseph E. Thomure, Susan P. Brandt, David
               Rollins and Samuel E. Brandt.*
</TABLE>
 
                                       29
<PAGE>   31
 
<TABLE>
<CAPTION>
EXHIBIT
NUMBER                           DESCRIPTION OF EXHIBITS
-------                          -----------------------
<C>       <C>  <S>
  2.4      --  Stock Purchase Agreement dated June 24, 1997, by and among
               the Company, CIVS, Inc. and the Shareholders of CIVs,
               Inc.(1)
  2.5      --  Stock Purchase Agreement dated August 28, 1997, by and among
               the Company and the shareholders of CareData Reports,
               Inc.(2)
  3.1      --  Certificate of Incorporation of the Company.*
  3.2      --  Bylaws of the Company.(4)
  4.1      --  See Articles IV, VI, VII and IX of the Certificate of
               Incorporation filed as Exhibit 3.1 and Articles I, II, III,
               VI and VII of the Bylaws filed as Exhibit 3.2.
  4.2      --  Specimen Stock Certificate of the Common Stock of the
               Registrant.*
 10.1      --  Securities Purchase Agreement dated January 8, 1996, between
               the Company and HealthPlan Services Corporation (For
               Exhibits F, G, J and E to the Securities Purchase Agreement,
               see Exhibits 10.6, 10.7, 10.8 and 10.9 hereto).*
 10.1.1    --  Amendment No. 1 to Securities Purchase Agreement.*
 10.1.2    --  Amendment No. 2 to Securities Purchase Agreement.*
 10.1.3    --  Amendment No. 3 to Securities Purchase Agreement.*
 10.2      --  EMPLOYMENT AGREEMENT DATED AS OF MAY 31, 1996, BETWEEN THE
               COMPANY AND MARK A. KAISER.*
 10.3      --  INTENTIONALLY OMITTED
 10.4      --  INTENTIONALLY OMITTED
 10.5      --  License and Services Agreement dated as of December 19,
               1997, between Medirisk of Illinois, Inc. and HEALTHSOUTH
               Corporation.(4)++
 10.6      --  Registration Rights Agreement dated as of January 9, 1996,
               between the Company and Pamella L. Leiter.*
 10.7      --  INTENTIONALLY OMITTED
 10.8      --  INTENTIONALLY OMITTED
 10.9      --  INTENTIONALLY OMITTED
 10.10     --  Registration Rights Agreement dated as of January 9, 1996,
               between the Company and Health Plan Services Corporation*
 10.11     --  Form of Indemnification Agreement between the Company and
               each of its officers and directors.*
 10.12     --  Form of Employee Shareholder Agreement.*
 10.13     --  Medirisk, Inc. 1996 Stock Incentive Plan.*
 10.14     --  Medirisk, Inc. 1996 Non-Management Directors Stock Option
               Plan.*
 10.15     --  Registration Agreement dated as of October 28, 1996, between
               the Company, Brantley Venture Partners II, L.P., Chase
               Manhattan Bank N.A., as Trustee, and Laurence H. Powell.*
 10.16     --  Credit Agreement, dated as of March 28, 1997, between the
               Company, as borrower, and NationsBank, N.A. (South), as
               lender.(3)
 11.1      --  Statements of computation of pro forma net loss per share of
               common stock (unaudited).(4)
 21.1      --  List of Subsidiaries of the Registrant.(4)
 23.1      --  Consent of KPMG Peat Marwick LLP.(5)
 24.1      --  Powers of Attorney (See page 53)
 27.1      --  Financial Data Schedule - Medirisk, Inc. (for SEC use
               only).(4)
 27.2      --  Restated Financial Data Schedule - Medirisk, Inc. (for SEC
               use only).(4)
</TABLE>
 
---------------
 
(1) Incorporated by reference from the Company's Current Report on Form 8-K
    filed with the Commission on July 9, 1997.
(2) Incorporated by reference from the Company's Current Report on Form 8-K
    filed with the Commission on September 15, 1997.
(3) Incorporated by reference from the Company's Annual Report on Form 10-K
    filed with the Commission on March 31, 1997.
(4) Previously filed.
 
                                       30
<PAGE>   32
 
(5) Filed herewith.
 ++ Confidential Treatment pursuant to 17 CFR sec.sec. 200.80 and 240.24b-2 has
    been requested regarding certain portions of the indicated Exhibit, which
    portions have been separately filed with the Commission.
 
     (b) Reports on Form 8-K
 
     No Current Reports on Form 8-K were filed by the Registrant during the
fourth quarter of the fiscal year ended December 31, 1997.
 
                                       31
<PAGE>   33
 
                                   SECTION F
 
                       CONSOLIDATED FINANCIAL STATEMENTS
 
                                       32
<PAGE>   34
 
                                   FORM 10-K
 
                        MEDIRISK, INC. AND SUBSIDIARIES
                          YEAR ENDED DECEMBER 31, 1997
 
                   LIST OF CONSOLIDATED FINANCIAL STATEMENTS
 
<TABLE>
<CAPTION>
                                                              PAGE
                                                              ----
<S>                                                           <C>
Medirisk, Inc. and Subsidiaries
  Independent Auditors' Report..............................   34
  Consolidated Balance Sheets as of December 31, 1997 and
     1996...................................................   35
  Consolidated Statements of Operations for the years ended
     December 31, 1997, 1996 and 1995.......................   36
  Consolidated Statements of Stockholders' Equity (deficit)
     for the years ended December 31, 1997, 1996 and 1995...   37
  Consolidated Statements of Cash Flows for the years ended
     December 31, 1997, 1996 and 1995.......................   38
  Notes to Consolidated Financial Statements................   39
</TABLE>
 
                                       33
<PAGE>   35
 
                          INDEPENDENT AUDITORS' REPORT
 
The Board of Directors and Stockholders
  Medirisk, Inc.:
 
     We have audited the accompanying consolidated balance sheets of Medirisk,
Inc. and subsidiaries as of December 31, 1997 and 1996, and the related
consolidated statements of operations, stockholders' equity (deficit), and cash
flows for each of the years in the three-year period ended December 31, 1997.
These consolidated financial statements are the responsibility of the Company's
management. Our responsibility is to express an opinion on these consolidated
financial statements based on our audits.
 
     We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.
 
     In our opinion, the consolidated financial statements referred to above
present fairly, in all material respects, the financial position of Medirisk,
Inc. and subsidiaries as of December 31, 1997 and 1996, and the results of their
operations and their cash flows for each of the years in the three-year period
ended December 31, 1997, in conformity with generally accepted accounting
principles.
 
                                               /s/ KPMG PEAT MARWICK LLP
 
Atlanta, Georgia
February 6, 1998
 
                                       34
<PAGE>   36
 
                        MEDIRISK, INC. AND SUBSIDIARIES
 
                          CONSOLIDATED BALANCE SHEETS
 
<TABLE>
<CAPTION>
                                                                      DECEMBER 31,
                                                              ----------------------------
                                                                  1997            1996
                                                              ------------     -----------
<S>                                                           <C>              <C>
                                     ASSETS (NOTE 4)
Current assets:
  Cash and cash equivalents.................................  $  3,515,931     $   447,257
  Accounts receivable, less allowances for doubtful accounts
    of $147,557 and $97,439, at December 31, 1997 and 1996,
    respectively............................................     3,802,241       1,428,191
  Prepaid expenses..........................................       697,485         920,727
  Note receivable from officer (note 10)....................        22,500          22,500
  Other current assets......................................       451,513         152,184
                                                              ------------     -----------
        Total current assets................................     8,489,670       2,970,859
                                                              ------------     -----------
Property and equipment (note 3).............................     3,083,466       1,736,408
  Less accumulated depreciation and amortization............     1,444,489         893,601
                                                              ------------     -----------
    Property and equipment, net.............................     1,638,977         842,807
                                                              ------------     -----------
Excess of cost over net assets of businesses acquired, less
  accumulated amortization of $537,218 and $180,493 at
  December 31, 1997 and 1996, respectively (note 2).........     7,555,902       3,128,347
Other intangible assets, less accumulated amortization of
  $409,362 and $89,417 at December 31, 1997 and 1996,
  respectively (note 2).....................................     1,793,680         430,583
Software development costs, less accumulated amortization of
  $96,508 and $19,911 at December 31, 1997 and 1996,
  respectively..............................................     1,008,398         101,058
Note receivable from officer, excluding current portion
  (note 10).................................................        67,500          90,000
Other assets................................................       104,139         892,307
                                                              ------------     -----------
                                                              $ 20,658,266     $ 8,455,961
                                                              ============     ===========
                      LIABILITIES AND STOCKHOLDERS' EQUITY (DEFICIT)
Current liabilities:
  Current installments of long-term debt and obligations
    under capital leases (notes 4, 5, and 6)................  $    168,493     $ 1,842,074
  Accounts payable..........................................       257,723         639,002
  Accrued expenses..........................................       757,975         448,749
  Income taxes payable (note 7).............................       815,791              --
  Deferred revenue..........................................     2,308,610       2,536,283
                                                              ------------     -----------
        Total current liabilities...........................     4,308,592       5,466,108
                                                              ------------     -----------
Long-term debt and obligations under capital leases,
  excluding current installments, principally related party
  debt at December 31, 1996 (notes 4, 5, and 6).............       165,251       7,194,897
Dividends payable (notes 8(b) and 8(d)).....................            --         618,010
                                                              ------------     -----------
        Total liabilities...................................     4,473,843      13,279,015
                                                              ------------     -----------
Stockholders' equity (deficit) -- (note 8):
  Preferred stock, $0.001 par value; 1,000,000 shares
    authorized; none outstanding............................            --              --
  Series A convertible preferred stock, $0.001 par value
    (estimated unaccrued aggregate involuntary liquidation
    preference $3,461,000 at December 31, 1996); no shares
    authorized, issued, or outstanding at December 31, 1997;
    3,000,000 shares authorized; 1,292,359 issued and
    outstanding shares at December 31, 1996.................            --           1,292
  Series B convertible preferred stock, $0.001 par value
    (estimated unaccrued aggregate involuntary liquidation
    preference $1,967,000 at December 31, 1996); no shares
    authorized, issued, or outstanding at December 31, 1997;
    400,000 shares authorized; 280,623 issued and
    outstanding shares at December 31, 1996 (note 5)........            --             281
  Common stock, $0.001 par value; 20,000,000 shares
    authorized; 4,193,346 and 709,943 issued and outstanding
    shares at December 31, 1997 and 1996, respectively......         4,193             710
  Additional paid-in capital................................    28,559,279       4,971,644
  Accumulated deficit.......................................   (12,379,049)     (9,796,981)
                                                              ------------     -----------
                                                                16,184,423      (4,823,054)
Commitments and contingencies (notes 6 and 8)...............            --              --
                                                              ------------     -----------
                                                              $ 20,658,266     $ 8,455,961
                                                              ============     ===========
</TABLE>
 
          See accompanying notes to consolidated financial statements.
 
                                       35
<PAGE>   37
 
                        MEDIRISK, INC. AND SUBSIDIARIES
 
                     CONSOLIDATED STATEMENTS OF OPERATIONS
 
<TABLE>
<CAPTION>
                                                                  YEARS ENDED DECEMBER 31,
                                                           --------------------------------------
                                                              1997          1996          1995
                                                           -----------   -----------   ----------
<S>                                                        <C>           <C>           <C>
Revenue (note 9).........................................  $16,748,839   $ 8,904,133   $3,654,692
Salaries, wages, and benefits............................    7,909,600     6,092,792    2,577,416
Other operating expenses.................................    4,373,954     2,314,654      956,097
Depreciation and amortization............................    1,304,155       786,849      193,399
Acquired in-process research and development costs and
  integration costs (note 2).............................    4,575,025     6,180,000           --
                                                           -----------   -----------   ----------
          Operating loss.................................   (1,413,895)   (6,470,162)     (72,220)
Interest income (expense), net...........................      344,973      (703,542)     (65,433)
Other expense, net.......................................           --       (57,073)          --
                                                           -----------   -----------   ----------
          Loss before income taxes and extraordinary
            item.........................................   (1,068,922)   (7,230,777)    (137,653)
Provision for income taxes (note 7)......................     (707,000)           --           --
                                                           -----------   -----------   ----------
          Loss before extraordinary item.................   (1,775,922)   (7,230,777)    (137,653)
Extraordinary item -- loss on early extinguishment of
  debt (note 5)..........................................     (806,146)           --           --
                                                           -----------   -----------   ----------
          Net loss.......................................   (2,582,068)   (7,230,777)    (137,653)
Accretion of discount on Series A convertible preferred
  stock..................................................           --            --      (92,580)
Convertible preferred stock dividend requirement.........      (24,673)     (201,608)    (201,608)
                                                           -----------   -----------   ----------
          Net loss attributable to common stock..........  $(2,606,741)  $(7,432,385)  $ (431,841)
                                                           ===========   ===========   ==========
Net loss per share of common stock -- basic and
  diluted:...............................................
  Loss per share before extraordinary item...............  $     (0.46)  $     (4.84)  $    (0.30)
  Loss per share -- extraordinary item...................        (0.21)           --           --
                                                           -----------   -----------   ----------
          Net loss per share of common stock.............  $     (0.67)  $     (4.84)  $    (0.30)
                                                           ===========   ===========   ==========
Weighted average number of common shares used in
  calculating net loss per share of common stock -- basic
  and diluted............................................    3,918,347     1,536,159    1,427,080
                                                           ===========   ===========   ==========
</TABLE>
 
          See accompanying notes to consolidated financial statements.
 
                                       36
<PAGE>   38
 
                        MEDIRISK, INC. AND SUBSIDIARIES
 
           CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT)
                 YEARS ENDED DECEMBER 31, 1997, 1996, AND 1995
<TABLE>
<CAPTION>
                                                    SERIES B
                         SERIES A CONVERTIBLE      CONVERTIBLE
                           PREFERRED STOCK       PREFERRED STOCK       COMMON STOCK      ADDITIONAL
                         --------------------   -----------------   ------------------     PAID-IN     ACCUMULATED
                           SHARES     AMOUNT     SHARES    AMOUNT    SHARES     AMOUNT     CAPITAL       DEFICIT
                         ----------   -------   --------   ------   ---------   ------   -----------   ------------
<S>                      <C>          <C>       <C>        <C>      <C>         <C>      <C>           <C>
Balance at December 31,
 1994..................          --   $    --         --   $  --      649,730   $  650   $   492,330   $ (2,335,971)
Accretion of discount
 on Series A
 convertible preferred
 stock (note 8(b)).....          --        --         --      --           --       --            --        (92,580)
Issuance of common
 stock.................          --        --         --      --        6,496        6         1,944             --
Repayment of note
 receivable from
 stockholder (note
 8(e)).................          --        --         --      --           --       --            --             --
Accrued dividend
 payable (note 8(b))...          --        --         --      --           --       --      (201,608)            --
Net loss...............          --        --         --      --           --       --            --       (137,653)
                         ----------   -------   --------   -----    ---------   ------   -----------   ------------
Balance at December 31,
 1995..................          --        --         --      --      656,226      656       292,666     (2,566,204)
Issuance of Series B
 convertible preferred
 stock, net of issuance
 costs of $220,556
 (notes 5 and 8).......          --        --    280,623     281           --       --     1,779,163             --
Conversion of Series A
 convertible preferred
 stock from redeemable
 to nonredeemable (note
 8(b)).................   1,292,359     1,292         --      --           --       --     2,301,179             --
Issuance of common
 stock, primarily in
 acquisitions (note
 2)....................          --        --         --      --      118,677      119       137,283             --
Repayment of note
 receivable from
 stockholder (note
 8(e)).................          --        --         --      --           --       --            --             --
Forgiveness of note
 receivable from
 stockholder (note
 8(c)).................          --        --         --      --           --       --            --             --
Discount on issuance of
 debt arising from
 stock purchase
 warrants (note 5).....          --        --         --      --           --       --       573,111             --
Stock option
 compensation expense..          --        --         --      --           --       --        99,585             --
Accrued dividend
 payable (note 8(b))...          --        --         --      --           --       --      (201,608)            --
Cancellation of
 treasury stock........          --        --         --      --      (64,960)     (65)       (9,735)            --
Net loss...............          --        --         --      --           --       --            --     (7,230,777)
                         ----------   -------   --------   -----    ---------   ------   -----------   ------------
Balance at December 31,
 1996..................   1,292,359     1,292    280,623     281      709,943      710     4,971,644     (9,796,981)
Common stock issued in
 initial public
 offering (note
 8(h)).................          --        --         --      --    2,300,000    2,300    22,623,371             --
Conversion of Series A
 and Series B
 convertible preferred
 stock into common
 stock (note 8(h)).....  (1,292,359)   (1,292)  (280,623)   (281)   1,021,800    1,022           551             --
Dividends paid on
 Series A and Series B
 convertible preferred
 stock (note 8(h)).....          --        --         --      --           --       --       (24,673)            --
Issuance of common
 stock in acquisitions
 (note 2)..............          --        --         --      --      143,682      144       901,023             --
Stock option
 exercises.............          --        --         --      --       20,243       20       101,929             --
Common stock
 repurchased and
 canceled..............          --        --         --      --       (2,331)      (3)      (14,566)            --
Net loss...............          --        --         --      --           --       --            --     (2,582,068)
                         ----------   -------   --------   -----    ---------   ------   -----------   ------------
Balance at December 31,
 1997..................          --   $    --         --   $  --    4,193,346   $4,193   $28,559,279   $(12,379,049)
                         ==========   =======   ========   =====    =========   ======   ===========   ============
 
<CAPTION>
 
                                                NOTE           TOTAL
                          TREASURY STOCK     RECEIVABLE    STOCKHOLDERS'
                         -----------------      FROM          EQUITY
                         SHARES    AMOUNT    STOCKHOLDER     (DEFICIT)
                         -------   -------   -----------   -------------
<S>                      <C>       <C>       <C>           <C>
Balance at December 31,
 1994..................   64,960   $(9,800)   $(75,000)     $(1,927,791)
Accretion of discount
 on Series A
 convertible preferred
 stock (note 8(b)).....       --        --          --          (92,580)
Issuance of common
 stock.................       --        --          --            1,950
Repayment of note
 receivable from
 stockholder (note
 8(e)).................       --        --      25,000           25,000
Accrued dividend
 payable (note 8(b))...       --        --          --         (201,608)
Net loss...............       --        --          --         (137,653)
                         -------   -------    --------      -----------
Balance at December 31,
 1995..................   64,960    (9,800)    (50,000)      (2,332,682)
Issuance of Series B
 convertible preferred
 stock, net of issuance
 costs of $220,556
 (notes 5 and 8).......       --        --          --        1,779,444
Conversion of Series A
 convertible preferred
 stock from redeemable
 to nonredeemable (note
 8(b)).................       --        --          --        2,302,471
Issuance of common
 stock, primarily in
 acquisitions (note
 2)....................       --        --          --          137,402
Repayment of note
 receivable from
 stockholder (note
 8(e)).................       --        --      14,000           14,000
Forgiveness of note
 receivable from
 stockholder (note
 8(c)).................       --        --      36,000           36,000
Discount on issuance of
 debt arising from
 stock purchase
 warrants (note 5).....       --        --          --          573,111
Stock option
 compensation expense..       --        --          --           99,585
Accrued dividend
 payable (note 8(b))...       --        --          --         (201,608)
Cancellation of
 treasury stock........  (64,960)    9,800          --               --
Net loss...............       --        --          --       (7,230,777)
                         -------   -------    --------      -----------
Balance at December 31,
 1996..................       --        --          --       (4,823,054)
Common stock issued in
 initial public
 offering (note
 8(h)).................       --        --          --       22,625,671
Conversion of Series A
 and Series B
 convertible preferred
 stock into common
 stock (note 8(h)).....       --        --          --               --
Dividends paid on
 Series A and Series B
 convertible preferred
 stock (note 8(h)).....       --        --          --          (24,673)
Issuance of common
 stock in acquisitions
 (note 2)..............       --        --          --          901,167
Stock option
 exercises.............       --        --          --          101,949
Common stock
 repurchased and
 canceled..............       --        --          --          (14,569)
Net loss...............       --        --          --       (2,582,068)
                         -------   -------    --------      -----------
Balance at December 31,
 1997..................       --   $    --    $     --      $16,184,423
                         =======   =======    ========      ===========
</TABLE>
 
          See accompanying notes to consolidated financial statements.
                                       37
<PAGE>   39
 
                        MEDIRISK, INC. AND SUBSIDIARIES
 
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
 
<TABLE>
<CAPTION>
                                                                    YEARS ENDED DECEMBER 31,
                                                              -------------------------------------
                                                                 1997          1996         1995
                                                              -----------   -----------   ---------
<S>                                                           <C>           <C>           <C>
Cash flows from operating activities:
  Net loss..................................................  $(2,582,068)  $(7,230,777)  $(137,653)
  Adjustments to reconcile net loss to net cash (used in)
    provided by operating activities:
    Acquired in-process research and development costs......    4,375,000     6,180,000          --
    Depreciation and amortization...........................    1,304,155       786,849     193,399
    Loss due to early extinguishment of debt................      806,146            --          --
    Other...................................................           --       135,585          --
    Decrease (increase) in:
      Accounts receivable...................................   (1,925,277)     (447,120)   (273,620)
      Other assets..........................................      137,848      (846,014)     (5,339)
    Increase (decrease) in:
      Accounts payable......................................     (870,028)      353,520      83,456
      Accrued expenses and other liabilities................     (175,425)      151,405      78,152
      Deferred revenue......................................   (1,766,992)      154,158      76,921
                                                              -----------   -----------   ---------
        Net cash (used in) provided by operating
          activities........................................     (696,641)     (762,394)     15,316
                                                              -----------   -----------   ---------
Cash flows from investing activities:
  Acquisition of businesses, net of cash acquired...........   (7,386,208)   (6,925,393)         --
  Purchases of property and equipment.......................     (948,833)     (138,792)         --
  Additions to software development costs...................     (983,937)     (120,969)         --
  Repayment of (loan to) officer............................       22,500      (112,500)         --
                                                              -----------   -----------   ---------
        Net cash used in investing activities...............   (9,296,478)   (7,297,654)         --
                                                              -----------   -----------   ---------
Cash flows from financing activities:
  Proceeds from issuance of common stock and stock option
    exercises...............................................   22,727,620        15,084       1,950
  Common stock repurchased and canceled.....................      (14,569)           --          --
  Proceeds from issuance of Series B convertible preferred
    stock...................................................           --     2,000,000          --
  Payments for Series B convertible preferred stock issuance
    costs...................................................           --      (220,556)         --
  Payment of preferred stock dividends......................     (642,683)           --          --
  Proceeds from issuance of long-term debt, principally
    related party...........................................           --     7,407,086          --
  Payments for debt issuance costs..........................           --      (345,000)         --
  Payments on long-term debt and obligations under capital
    leases..................................................   (9,008,575)     (652,147)   (167,053)
  Repayment of note receivable from stockholder.............           --        14,000      25,000
                                                              -----------   -----------   ---------
        Net cash provided by (used in) financing
          activities........................................   13,061,793     8,218,467    (140,103)
                                                              -----------   -----------   ---------
        Net increase (decrease) in cash and cash
          equivalents.......................................  $ 3,068,674   $   158,419   $(124,787)
Cash and cash equivalents at beginning of period............      447,257       288,838     413,625
                                                              -----------   -----------   ---------
Cash and cash equivalents at end of period..................  $ 3,515,931   $   447,257   $ 288,838
                                                              ===========   ===========   =========
Supplemental disclosure of cash flow information -- cash
  paid during the period for interest.......................  $   129,771   $   736,432   $  65,433
                                                              ===========   ===========   =========
Supplemental disclosures of noncash activities:
  Purchase of computer and office equipment under capital
    lease arrangements......................................  $        --   $   332,035   $ 191,563
                                                              ===========   ===========   =========
  Discount on issuance of debt arising from stock purchase
    warrants................................................  $        --   $   573,111   $      --
                                                              ===========   ===========   =========
  Accrual of dividend payable on Series A convertible
    preferred stock.........................................  $        --   $   201,608   $ 201,608
                                                              ===========   ===========   =========
Acquisitions of businesses:
  Fair value of assets acquired.............................  $ 8,249,588   $ 4,909,167   $      --
  Acquired in-process research and development costs........    4,375,000     6,180,000          --
  Fair value of liabilities assumed.........................   (3,600,535)   (2,961,849)         --
  Common stock issued.......................................     (901,167)     (122,318)         --
  Debt issued...............................................           --    (1,076,000)         --
                                                              -----------   -----------   ---------
        Total cash paid for acquisitions....................    8,122,886     6,929,000          --
Cash acquired...............................................     (736,678)       (3,607)         --
                                                              -----------   -----------   ---------
        Net cash paid for acquisitions......................  $ 7,386,208   $ 6,925,393   $      --
                                                              ===========   ===========   =========
</TABLE>
 
          See accompanying notes to consolidated financial statements.
 
                                       38
<PAGE>   40
 
                        MEDIRISK, INC. AND SUBSIDIARIES
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                       DECEMBER 31, 1997, 1996, AND 1995
 
(1) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
  (a) Description of Business
 
     Medirisk, Inc. (the "Company") is a provider of proprietary database
products, decision-support software and analytical services to the health care
industry. The Company's products and services enable its customers to make
objective comparisons of the financial costs and clinical outcomes of physician
services to customer-specific and industry benchmarks, assess patient
satisfaction with specific managed care plans, and obtain information concerning
the background and credentials of physicians. These capabilities assist health
care industry participants in measuring the performance of health care payors
and providers.
 
     Applications of Medirisk's products include pricing managed care contracts,
evaluating physician fee schedules and utilization of physician services,
comparing provider outcomes and health plan performance, credentialing and
recruiting physicians, developing health care delivery networks, and marketing
health care services. The Company actively sells its products to leading health
plans, insurers, hospitals, large multi-specialty physician groups, physician
practice management companies, employers, and pharmaceutical companies, as well
as smaller customers, including single-specialty physician groups.
 
  (b) Basis of Financial Statement Presentation
 
     The consolidated financial statements have been prepared in conformity with
generally accepted accounting principles. In preparing the consolidated
financial statements, management is required to make estimates and assumptions
that affect the reported amounts of assets and liabilities as of the date of the
balance sheet, income and expenses for the period, and disclosure of contingent
assets and liabilities. Actual results could differ from those estimates.
 
     The consolidated financial statements include the accounts of Medirisk,
Inc. and its subsidiaries. All significant intercompany balances and
transactions have been eliminated in consolidation.
 
  (c) Cash Equivalents
 
     Cash equivalents at December 31, 1997 and 1996 included amounts of
$2,106,963 and $145,897, respectively, invested in money market accounts with a
major brokerage firm. For purposes of the statement of cash flows, the Company
considers all highly liquid debt instruments with original maturities of three
months or less to be cash equivalents.
 
  (d) Revenue Recognition
 
     The Company provides services and licenses its products primarily pursuant
to single- and multi-year contracts that provide for the payment of
nonrefundable annual fees, often in advance of use or shipment, or of quarterly
fees generally billed in advance of service delivery. The products are
segregated into three types: market performance, clinical performance, and
physician credentials products. The market performance products provide
customers with information from the Company's market performance product
databases. Revenue on these sales is recognized upon the delivery of the data.
The Company also licenses the exclusive rights to market the results of its
managed care consumer satisfaction surveys. Revenue from the licenses of
disease-specific customized surveys to the pharmaceutical industry is recognized
as the related costs of producing the survey are incurred, and revenues from
noncustomized data licensing is recognized upon delivery. The clinical
performance products revenues relate to the delivery of services and are
recognized over the contract terms as the services are provided. The physician
credentials products consist of (i) data and services provided to customers over
time, for which revenue is recognized ratably over the life of the contract, and
(ii) credentials reports that validate physicians' education, training, and
other matters, for which revenue is recognized upon delivery of the completed
reports. Customer service revenues are recognized ratably over
 
                                       39
<PAGE>   41
 
the service contract period. All other revenue, including fees for training,
consulting fees, and other miscellaneous services, is recognized upon the
performance of the applicable services.
 
  (e) Deferred Revenue
 
     Deferred revenue represents accounts receivable and payments to the Company
by customers in advance of revenue recognition.
 
  (f) Accounts Receivable
 
     The Company enters into multi-year, non-cancelable subscription contracts,
for which the associated receivables are recorded as accounts receivable and
deferred revenue when they become due. The contract balances are due at the
beginning of their respective annual anniversary dates.
 
  (g) Property and Equipment
 
     Property and equipment are stated at cost, less accumulated depreciation
and amortization. Depreciation is provided on the straight-line method over the
estimated useful lives of the assets ranging from three to seven years.
Amortization of assets acquired under capital lease arrangements not
transferring ownership or without a bargain purchase option is recorded using
the straight-line method over the estimated useful lives of the assets or the
lease term, whichever is shorter.
 
  (h) Excess of Cost Over Net Assets of Businesses Acquired
 
     The excess of cost over net assets of businesses acquired (goodwill) is
being amortized using the straightline method over a period of 15 years. The
amortization period is based on, among other things, the nature of the products
and markets, the competitive position of the acquired companies, and the
adaptability to changing market conditions of the acquired companies. At each
balance sheet date, the Company assesses the recoverability of this intangible
asset by determining whether the amortization of the goodwill balance over its
remaining life can be recovered through undiscounted future operating cash flows
of the acquired operation. The amount of goodwill impairment, if any, is
measured based on projected discounted future operating cash flows using a
discount rate equal to the rate of return that would be required by the Company
for a similar investment with like risks.
 
  (i) Other Intangible Assets
 
     Other intangible assets are comprised mainly of acquired products and
acquired customer contracts. The costs of acquired products and acquired
customer contracts from business acquisitions are derived using a fair value
method of allocation. Other intangible assets are being amortized using the
straight-line method over five years. The Company makes an ongoing assessment of
the recoverability of its intangible assets by comparing the amount capitalized
for each asset to the estimated future cash flows expected to result from the
use of the asset and its eventual disposition. If the sum of the future cash
flows is less than the amount capitalized, a write-down to fair value is
recorded.
 
  (j) Research and Development Costs and Software Development Costs
 
     Research and development costs are expensed as incurred. Amounts expensed
for research and development for the years ended December 31, 1997, 1996, and
1995, were $2,149,155, $951,645, and $221,943, respectively.
 
     The Company capitalizes software development costs by project, commencing
when technological feasibility for the respective product is established and
concluding when the product is ready for general release to customers. The
Company makes an ongoing assessment of the recoverability of its capitalized
software projects by comparing the amount capitalized for each product to the
estimated NRV of the product. If the NRV is less than the amount capitalized, a
write-down to NRV is recorded. The Company capitalized computer software
development costs of $983,937 and $120,969 for the years ended December 31, 1997
and
 
                                       40
<PAGE>   42
 
1996, respectively. Capitalized computer software development costs are being
amortized ratably based on the projected revenue associated with the software
products or the straight-line method over five years, whichever method results
in a higher level of amortization. Amortization expense was $76,597 and $19,911
for the years ended December 31, 1997 and 1996, respectively.
 
  (k) Stock Option Plans
 
     Prior to January 1, 1996, the Company accounted for its stock option plans
in accordance with the provisions of Accounting Principles Board ("APB") Opinion
No. 25, Accounting for Stock Issued to Employees, and related interpretations.
As such, compensation expense to be recognized over the related vesting period
would generally be determined on the date of grant only if the current market
price of the underlying stock exceeded the exercise price. On January 1, 1996,
the Company adopted Statement of Financial Accounting Standards No. 123,
Accounting for Stock-Based Compensation ("SFAS 123"), which permits entities to
recognize as expense over the vesting period the fair value of all stock-based
awards on the date of grant. Alternatively, SFAS 123 also allows entities to
continue to apply the provisions of APB Opinion No. 25 and provide pro forma net
income (loss) and pro forma income (loss) per share disclosures for employee
stock option grants made in 1995 and future years as if the fair-value-based
method defined in SFAS 123 had been applied. The Company has elected to continue
to apply the provisions of APB Opinion No. 25. The pro forma effects of SFAS 123
for 1997 and 1996 are presented in footnote 8(c). The effects of SFAS 123 for
1995 are not material to the Company's consolidated financial statements and,
therefore, the pro forma and other disclosure requirements have not been
presented.
 
  (l) Net Loss Per Share of Common Stock
 
     On December 31, 1997, the Company adopted Statement of Financial Accounting
Standards No. 128, Earnings Per Share ("SFAS 128"), which prescribes the
calculation methodology and financial reporting requirements for basic and
diluted earnings per share. Basic earnings (loss) per common share available to
common shareholders is based on the weighted-average number of common shares
outstanding. Diluted earnings (loss) per common share available to common
shareholders is based on the weighted-average number of common shares
outstanding and dilutive potential common shares, such as dilutive stock
options.
 
     Retroactive restatement has been made to share and per share amounts for
the reverse stock split (see note 8(g)) and conversion of all of the Company's
Series A convertible preferred stock and Series B convertible preferred stock
into common stock which occurred upon consummation of the Company's initial
public offering in January 1997 (see note 8(h)). Weighted average number of
shares of common stock outstanding through December 31, 1996 has been calculated
pursuant to Securities and Exchange Commission Staff Accounting Bulletin No. 98
("SAB 98") whereby common stock, options, warrants, or other potentially
dilutive instruments that are issued for nominal consideration ("nominal
issuances") during the periods covered by statements of operations included in
the Registration Statement for an initial public offering are reflected in
earnings per share calculations in a manner similar to a stock split or stock
dividend for which retroactive restatement is required. The Company had nominal
issuances in the periods covered by its Registration Statement for its initial
public offering. The computation of diluted net loss per share of common stock
was antidilutive in each of the periods presented; therefore, the amounts
reported for basic and diluted net loss per share are the same.
 
     All prior period net loss per share data presented in these consolidated
financial statements have been restated to conform to the provisions of SFAS 128
and SAB 98.
 
  (m) Impairment of Long-Lived Assets and for Long-Lived Assets to be Disposed
of
 
     The Company adopted the provisions of SFAS No. 121, Accounting for the
Impairment of Long-Lived Assets and for Long-Lived Assets to be Disposed of, on
January 1, 1996. This statement requires that long-lived assets be reviewed for
impairment whenever events or changes in circumstances indicate that the
carrying amount of an asset may not be recoverable. Recoverability of assets to
be held and used is measured by a comparison of the carrying amount of an asset
to future net cash flows expected to be generated by the asset. If such assets
are considered to be impaired, the impairment to be recognized is measured by
the
 
                                       41
<PAGE>   43
 
amount by which the carrying amount of the assets exceed the fair value of the
assets. Assets to be disposed of are reported at the lower of the carrying
amount or fair value less costs to sell.
 
  (n) Income Taxes
 
     Deferred income tax assets and liabilities are recognized for the future
tax consequences attributable to differences between financial statement
carrying amounts of existing assets and liabilities and their respective tax
bases and operating loss carryforwards. Deferred income tax assets and
liabilities are measured using enacted tax rates expected to apply to taxable
income in the years in which those temporary differences are expected to be
recovered or settled. The effect on deferred income tax assets and liabilities
of a change in tax rates is recognized in income in the period that includes the
enactment date.
 
(2) BUSINESS ACQUISITIONS
 
1997 ACQUISITIONS
 
  Staff-Link, Inc. ("Staff-Link")
 
     In May 1997, the Company acquired substantially all of the assets of
Staff-Link of St. Louis, Missouri, a provider of a physician database and
related software utilities designed to assist health care organizations with
their in-house recruiting efforts. The Company purchased Staff-Link, Inc. for
$300,000 in cash and the assumption of net assets of $251,000. The total
purchase price paid to the seller in the transaction was $250,000. The
acquisition was accounted for using the purchase method of accounting with the
results of operations of the business acquired included from the effective date
of the acquisition. The acquisition resulted in acquired customer contracts of
approximately $527,000 and excess of cost over net assets acquired of
approximately $49,000.
 
  CIVS, Inc. ("CIVS")
 
     Effective June 1, 1997, the Company acquired all of the outstanding shares
of CIVS of Rockville, Maryland, a leading national provider of credentialing
services to hospitals and managed care organizations for approximately
$3,500,000 in cash and 129,166 shares of the Company's common stock (valued at
$792,000) and the assumption of net assets of $76,000. The total purchase price
paid to the sellers in the transaction was $4,300,000. The acquisition was
accounted for using the purchase method of accounting with the results of
operations of the business acquired included from the effective date of the
acquisition. The acquisition resulted in purchased in-process research and
development costs of approximately $3,100,000, acquired products of
approximately $415,000, and excess of cost over net assets acquired of
approximately $1,100,000. If the acquired business exceeds certain performance
goals, contingent consideration will be paid by the Company based upon a
multiple of CIVS's operating income over a predetermined amount through 1999.
These payments could be significant. Contingent consideration ultimately paid
will be added to excess cost over net assets acquired and amortized
prospectively.
 
  CareData Reports, Inc. ("CareData")
 
     Effective August 1, 1997, the Company acquired all of the outstanding
shares of CareData of New York, New York, which creates reports analyzing
consumer satisfaction with more than 150 aspects of managed health care plans
and ranks specific health plans accordingly. CareData's products are used by
managed care plans to assess their competitive position and quality of care, by
employers to evaluate health plans and by pharmaceutical companies to target
potential markets for their products. The Company purchased CareData for
approximately $4,100,000 in cash and 14,516 shares of Medirisk common stock
(valued at $109,379) and the assumption of net assets of $376,000.The total
purchase price paid to the sellers in the transaction was $4,200,000. The
acquisition was accounted for using the purchase method of accounting with the
results of operations of the business acquired included from the effective date
of the acquisition. The acquisition resulted in in-process research and
development costs of approximately $975,000, acquired products of approximately
$200,000, and excess of cost over net assets acquired of approximately
$2,900,000. If the acquired business exceeds certain performance goals,
contingent consideration will be paid by the Company based upon a
 
                                       42
<PAGE>   44
 
multiple of CareData's operating income over a predetermined amount through
1999. These payments could be significant. Contingent consideration ultimately
paid will be added to excess cost over net assets acquired and amortized
prospectively.
 
  Medsource, Inc. ("Medsource")
 
     In November 1997, the Company acquired all of the outstanding shares of
Medsource of St. Paul, Minnesota, which licenses databases of physician
information for use in recruiting physicians, developing health care networks,
and marketing hospitals. The Company purchased Medsource for $250,000 in cash
and the assumption of net liabilities of $805,000. The total purchase price paid
to the sellers in the transaction was $250,000. The acquisition was accounted
for using the purchase method of accounting with the results of operations of
the business acquired included from the effective date of the acquisition. The
acquisition resulted in purchased in-process research and development costs of
approximately $300,000, acquired products of approximately $125,000, and excess
of cost over net assets acquired of approximately $755,000. If the acquired
business exceeds certain performance goals, contingent consideration will be
paid by the Company based upon a multiple of Medsource's operating income over a
predetermined amount through 1999. These payments could be significant.
Contingent consideration ultimately paid will be added to excess cost over net
assets acquired and amortized prospectively.
 
  Integration Activities
 
     The Company incurred approximately $200,000 of integration costs during
1997 for these 1997 acquisitions.
 
1996 ACQUISITIONS
 
  Formations in HealthCare, Inc. ("Formations")
 
     In January 1996, the Company acquired Formations of Chicago, Illinois for
approximately $1,475,000 in cash, 99,466 shares of the Company's common stock,
and options to purchase 28,947 shares of the Company's common stock at an
exercise price of $0.64 per share. Formations provides clinical performance
products that allow customers to measure outcomes across a range of care within
a variety of medical specialties. These products also enable both payers and
providers to measure clinical outcomes and apply that information to attract and
retain managed care arrangements and to improve quality of clinical care. The
acquisition was accounted for using the purchase method of accounting with the
results of operations of the business acquired included from the effective date
of the acquisition. The acquisition resulted in purchased in-process research
and development costs of approximately $1,040,000, acquired products of
approximately $170,000, and excess of cost over net assets acquired of
approximately $422,000.
 
  PracticeMatch, Inc. ("PracticeMatch")
 
     In March 1996, the Company acquired PracticeMatch of St. Louis, Missouri
for approximately $5,454,000 in cash and $1,076,000 in promissory notes and
assumed net liabilities of $1,897,002. PracticeMatch offers a database
containing detailed information concerning physicians who are candidates for new
practice affiliations. The Company licenses its physician database products to
assist customers in cost-effective in-house recruiting of physicians. The
acquisition was accounted for using the purchase method of accounting with the
results of operations of the business acquired included from the effective date
of the acquisition. The acquisition resulted in purchased in process research
and development costs of approximately $5,140,000, acquired products of
approximately $350,000, and excess of cost over net assets acquired of
approximately $2,887,000.
 
                                       43
<PAGE>   45
 
PRO FORMA RESULTS
 
     Unaudited pro forma results of operations as if the above acquisitions
occurred on January 1, 1996 are as follows:
 
<TABLE>
<CAPTION>
                                                               YEAR ENDED DECEMBER 31,
                                                              -------------------------
                                                                 1997          1996
                                                              -----------   -----------
<S>                                                           <C>           <C>
Revenues....................................................  $19,767,000   $15,167,000
                                                              ===========   ===========
Net income (loss)...........................................  $   134,000   $(2,216,000)
                                                              ===========   ===========
Net income (loss) per share.................................  $      0.03   $     (1.32)
                                                              ===========   ===========
</TABLE>
 
     The pro forma results include the historical accounts of the Company and
the acquired entities adjusted to reflect the effects of the depreciation and
amortization of the acquired identifiable tangible and intangible assets based
on the new cost basis of the assets acquired, additional interest expense
related to notes payable issued in connection with the acquisitions, and the
reversal of the nonrecurring acquired in-process research and development costs
recorded in connection with the acquisitions. The pro forma results are not
necessarily indicative of actual results which might have occurred had the
operations and management of the Company and the acquired entities been combined
in 1997 and 1996.
 
(3) PROPERTY AND EQUIPMENT
 
     Property and equipment are summarized as follows:
 
<TABLE>
<CAPTION>
                                                                   DECEMBER 31,
                                                              -----------------------
                                                                 1997         1996
                                                              ----------   ----------
<S>                                                           <C>          <C>
Furniture and fixtures......................................  $  354,744   $  344,365
Computer and office equipment...............................   2,523,240    1,329,294
Leasehold improvements......................................     205,482       62,749
                                                              ----------   ----------
                                                              $3,083,466   $1,736,408
                                                              ==========   ==========
</TABLE>
 
     Included in property and equipment is equipment under capital lease
arrangements with a cost of $967,929 and $937,020 and accumulated amortization
of $671,563 and $533,983 at December 31, 1997 and 1996, respectively.
 
     Amortization of equipment held under capital lease arrangements is included
in depreciation expense.
 
                                       44
<PAGE>   46
 
(4) LONG-TERM DEBT AND OBLIGATIONS UNDER CAPITAL LEASES
 
     Long-term debt and obligations under capital leases are summarized as
follows:
 
<TABLE>
<CAPTION>
                                                                  DECEMBER 31,
                                                              ---------------------
                                                                1997        1996
                                                              --------   ----------
<S>                                                           <C>        <C>
10% unsecured senior subordinated note payable; paid off in
  1997 (see note 5).........................................  $     --   $6,900,000
10% unsecured notes payable resulting from PracticeMatch
  acquisition; paid off in 1997.............................        --    1,076,000
Unsecured line of credit payable to bank; paid off in
  1997......................................................        --      507,086
9% unsecured note payable to related party; paid off in
  1997......................................................        --      137,228
Obligations under capital leases, due in monthly
  installments expiring at various dates through February
  2001, at varying interest rates, secured by property and
  equipment (note 6(a)).....................................   214,631      416,657
Other debt assumed in an acquisition with varying interest
  rates and maturity dates..................................   119,113           --
                                                              --------   ----------
                                                               333,744    9,036,971
Less current installments...................................   168,493    1,842,074
                                                              --------   ----------
          Total long-term debt and obligations under capital
            leases, excluding current installments..........  $165,251   $7,194,897
                                                              ========   ==========
</TABLE>
 
     Future minimum debt payments and obligations under capital leases are as
follows:
 
<TABLE>
<CAPTION>
YEARS ENDING DECEMBER 31,
-------------------------
<S>                                                           <C>
1998........................................................  $168,493
1999........................................................   153,081
2000........................................................    10,483
2001........................................................     1,687
                                                              --------
                                                              $333,744
                                                              ========
</TABLE>
 
     Based on the borrowing rates currently available to the Company for debt
with similar terms and average maturities, the fair value of long-term debt
approximates its carrying value.
 
     On March 28, 1997, the Company entered into a two-year $10,000,000 line of
credit agreement (the "Credit Agreement") with a commercial bank. Borrowings
under the Credit Agreement accrue interest at either prime or LIBOR plus 1.65%
to 2.25%, depending on interest rate elections made by the Company and certain
financial ratio positions as defined in the Credit Agreement. Interest on
borrowings is payable monthly and principal is due at expiration of the Credit
Agreement, March 28, 1999. Borrowings under the Credit Agreement are subject to
certain customary financial covenants and dividend restrictions and are secured
by substantially all of the Company's assets. There were no borrowings under the
Credit Agreement during 1997.
 
(5) HEALTHPLAN SERVICES SECURITIES PURCHASE AGREEMENT (SEE NOTE 8(H))
 
     On January 8, 1996, for the purpose of financing the Company's ongoing
acquisition program and working capital needs, the Company and HealthPlan
Services Corporation ("HPSC"), entered into a Securities Purchase Agreement (the
"Agreement"). Under the Agreement, HPSC purchased 280,623 shares of the
Company's Series B convertible preferred stock for $2,000,000 (see note 8) and
agreed to purchase up to $10,000,000 in original principal amount of senior
subordinated notes. In addition, HPSC would be issued warrants to purchase up to
432,101 shares of the Company's common stock for $0.015 per share, based upon
the amount of senior subordinated debt purchased. HPSC's obligation to purchase
senior subordinated notes under the Agreement terminated upon the earliest to
occur of (i) an initial public offering of the Company; (ii) a change of control
of the Company; (iii) an event of default; (iv) January 8, 1999; or (v) the
death or termination of employment of the Company's Chairman and Chief Executive
Officer.
 
                                       45
<PAGE>   47
 
     On March 13, 1996, the Company sold a $6,900,000 senior subordinated note
to HPSC. The note bore interest at 10% payable quarterly and was due upon the
earliest to occur of (i) an initial public offering by the Company; (ii) a
change of control of the Company; or (iii) at maturity on January 8, 2003.
Warrants to purchase 298,150 shares of the Company's common stock were issued to
HPSC in connection with issuance of this note. The proceeds received were
allocated to the notes and the warrants based on their relative fair values
resulting in a discount of $573,111 on the note, which was being amortized over
the life of the note.
 
     On January 31, 1997, the Company consummated an initial public offering
(see note 8(h)). As a result, the Agreement was terminated and the $6,900,000
note payable to HPSC was repaid. The Company recorded a charge of $806,146 for
early extinguishment of debt relating to the unamortized note discount and
related deferred financing costs.
 
(6) COMMITMENTS
 
  (a) Leases
 
     The Company has entered into noncancelable capital and operating lease
agreements for office space, furniture and fixtures, and computer and office
equipment. Future minimum payments under all such noncancelable capital and
operating leases as of December 31, 1997 are as follows:
 
<TABLE>
<CAPTION>
                                                                               CAPITAL
YEAR ENDING DECEMBER 31,                                      OPERATING       (NOTE 4)
------------------------                                      ----------   ---------------
<S>                                                           <C>          <C>
1998........................................................  $  932,949      $170,403
1999........................................................     631,256        58,305
2000........................................................     538,818        11,558
2001........................................................     402,299         1,925
2002 and thereafter.........................................      24,150            --
                                                              ----------      --------
                                                              $2,529,472      $242,191
                                                              ==========
Less amount representing interest and sales taxes...........                    27,560
                                                                              --------
                                                                              $214,631
                                                                              ========
</TABLE>
 
     Rental expense for noncancelable operating leases was $661,302, $412,407,
and $212,547 for the years ended December 31, 1997, 1996, and 1995,
respectively.
 
  (b) Employment Agreement
 
     The Company has entered into an Employment Agreement (the "Employment
Agreement") with the Company's Chairman and Chief Executive Officer (the "CEO").
The Employment Agreement provides for a base salary subject to annual increases
at the discretion of the compensation committee, annual performance bonuses
based upon attaining certain goals established by the compensation committee,
minimum annual stock option grants, and certain severance benefits in the event
of termination. The Employment Agreement expires on May 31, 1999 and is
automatically renewable for one-year terms thereafter, subject to termination by
the Company or the CEO upon 60 days' notice.
 
  (c) Employee Benefit Plan
 
     The Company maintains a 401(k) plan (the "Plan") for the benefit of all
eligible employees. The Plan provides for employer matching contributions at the
discretion of the Company's management. The Company has not paid or accrued an
amount for matching contributions since the inception of the Plan.
 
(7) INCOME TAXES
 
     Income tax expense for the year ended December 31, 1997 was $707,000. All
of the $707,000 is current; $640,000 is federal and $67,000 is state tax
expense.
 
                                       46
<PAGE>   48
 
     Because of operating losses, net operating loss carryforwards, and other
factors, the Company did not provide any income tax expense for the years ended
December 31, 1996, and 1995. A reconciliation of the expected income tax
(benefit) expense (based on a U.S. Federal statutory tax rate of 34%) to the
actual income taxes is as follows:
 
<TABLE>
<CAPTION>
                                                          YEARS ENDED DECEMBER 31,
                                                     -----------------------------------
                                                        1997         1996         1995
                                                     ----------   -----------   --------
<S>                                                  <C>          <C>           <C>
Computed "expected" tax (benefit) expense..........  $ (363,433)  $(2,458,464)  $(46,802)
In-process research and development costs expensed
  for financial accounting purposes, not deductible
  for tax purposes.................................   1,706,250            --         --
Benefit of operating loss carryforward.............    (429,000)           --         --
Increase (decrease) in the valuation allowance for
  deferred income taxes, excluding benefit of
  operating loss carryforward......................    (139,217)    2,774,215     43,101
State income taxes, net of Federal income tax
  effect...........................................     (93,753)     (361,539)    (6,883)
Other..............................................      26,153        45,788     10,584
                                                     ----------   -----------   --------
Actual income taxes................................  $  707,000   $        --   $     --
                                                     ==========   ===========   ========
</TABLE>
 
     The tax effects of temporary differences and carryforwards which give rise
to deferred income tax assets and liabilities are presented below:
 
<TABLE>
<CAPTION>
                                                                   DECEMBER 31,
                                                              -----------------------
                                                                 1997         1996
                                                              ----------   ----------
<S>                                                           <C>          <C>
Deferred income tax assets:
  Acquired in-process research and development costs........  $2,116,682   $2,277,362
  Net operating loss carryforwards..........................     737,990    1,049,990
  Deferred revenue..........................................      99,510      201,276
  Property and equipment depreciation differences...........     182,845       97,006
  Other.....................................................     392,685       29,766
                                                              ----------   ----------
          Total gross deferred income tax assets............   3,529,712    3,655,400
Less valuation allowance....................................   2,540,121    3,108,338
                                                              ----------   ----------
          Deferred income tax assets, net of valuation
            allowance.......................................     989,591      547,062
                                                              ----------   ----------
Deferred income tax liabilities:
  Intangible assets.........................................     462,186      547,062
  Capitalized software costs................................     527,405           --
                                                              ----------   ----------
          Net deferred income tax asset and liability.......  $       --   $       --
                                                              ==========   ==========
</TABLE>
 
     The net change in the valuation allowance for the years ended December 31,
1997 and 1996 was a (decrease) increase of $(568,217) and $2,774,215,
respectively. Deferred income tax assets and liabilities are initially
recognized for differences between the financial statement carrying amount and
the tax bases of assets and liabilities which will result in future deductible
or taxable amounts and operating loss and tax credit carryforwards. A valuation
allowance is then established to reduce the deferred income tax asset to the
level at which it is "more likely than not" that the tax benefits will be
realized. Realization of tax benefits of deductible temporary differences and
operating loss or credit carryforwards depends on having sufficient taxable
income of an appropriate character within the carryback and carryforward
periods. Sources of taxable income that may allow for the realization of tax
benefits include: (1) taxable income in the current year or prior years that is
available through carryback; (2) future taxable income that will result from the
reversal of existing taxable temporary differences; and (3) taxable income
generated by future operations.
 
     The valuation allowance at December 31, 1997 includes approximately $1.0
million that will reduce goodwill if and when the tax benefits from an acquired
net operating loss are subsequently recognized.
 
     At December 31, 1997, the Company had net operating loss carryforwards of
approximately $1.9 million, which expire beginning in 2006 through 2011. Under
Internal Revenue Code Section 382, the Company's use of net operating loss
carryforwards is limited to approximately $1,100,000 per year as a result of the
 
                                       47
<PAGE>   49
 
Company's initial public offering completed in January 1997 (see note 8(h)).
Approximately $1.0 million of the net operating loss at December 31, 1997
relates to loss carryforwards acquired in connection with the 1997 Acquisitions.
Accordingly, such losses are limited to income generated by the acquired entity
as well as substantial annual limitations.
 
(8) STOCKHOLDERS' EQUITY (DEFICIT)
 
  (a) Articles of Incorporation
 
     On January 8, 1996, the Company's articles of incorporation were amended to
increase the number of authorized shares of common stock from 5,000,000 shares
to 20,000,000 shares and to establish 400,000 authorized shares of Series B
convertible preferred stock. On that same date, the Company's articles of
incorporation were amended to remove the redeemable feature from the Company's
Series A convertible preferred stock.
 
     In September 1996, the Company was reincorporated in Delaware, and in
connection with such reincorporation, the Company's treasury stock was canceled
and an additional 1,000,000 shares of preferred stock were authorized. In
addition, the Company's articles of incorporation were amended such that the
Company's Series A and Series B convertible preferred stock would be canceled
and no longer authorized upon completion of an initial public offering (see note
8(h)).
 
  (b) Series A and Series B Convertible Preferred Stock (see note 8(h))
 
     Until January 1996, the Series A convertible preferred stock (Series A
"CPS") carried a mandatory redemption feature pursuant to a Stockholders'
Agreement which required the Company to redeem all outstanding shares of Series
A CPS on the seventh anniversary of the original issue date (April 5, 1998) at a
price equivalent to the liquidation price of $1.95. In January 1996, the
redemption feature was eliminated and the balance related to this security was
reclassified to stockholders' equity.
 
     The holders of the Company's Series A CPS were entitled to dividends on a
cumulative basis at 8% which began on April 5, 1994. The holders of the
Company's Series B convertible preferred stock (Series B "CPS") were entitled to
dividends on a cumulative basis at 8% beginning on January 8, 1997. The Series A
CPS and Series B CPS were convertible at the option of the holder at any time
into common stock at a ratio of 0.6496 share for one share, subject to
adjustment in certain circumstances, and the holders of the Series A CPS and
Series B CPS carried voting power equivalent to the number of common shares into
which their preferred shares could be converted. Furthermore, the Company was
restricted from paying dividends on the Company's common stock until all unpaid
dividends on the Series A CPS and Series B CPS were paid. In no event could the
Series A CPS and Series B CPS dividends be paid until payment in full of the
senior subordinated note payable. These dividends payable were classified as
noncurrent at December 31, 1996 (see note 8(h)).
 
     In the event of liquidation, holders of the Series A CPS and Series B CPS
were entitled to the sum of (a) $1.95 per preferred share for Series A CPS and
$7.13 per preferred share for Series B CPS, (b) all accrued and unpaid
dividends, and (c) the portion of the fair market value of the assets and
liabilities of the Company attributable to the Series A CPS and Series B CPS
holders determined by the number of common shares that would be held by the
Series A CPS and Series B CPS holders upon conversion to common stock.
Additionally, the Series A CPS and Series B CPS would automatically convert upon
the occurrence of certain future events such as an initial public offering, as
defined, and the Company was required to obtain prior approval of the holders of
the Series A CPS and Series B CPS to effect certain transactions. The holders of
the Series A CPS and Series B CPS also carried certain other rights and
privileges, as further defined in the agreements.
 
     During 1994 notes payable of $300,000 and accrued interest of $18,000 were
converted into 318,000 shares of the Company's Series A CPS at a conversion
price of $1.00 per share. Until January 1996, the discount of $302,100 resulting
from the 1994 conversion, and the discount associated with the original issuance
of the Series A CPS of $96,450, representing the difference between the recorded
value of the Series A CPS
 
                                       48
<PAGE>   50
 
and the redemption value, were being accreted using the straight-line method
from issuance date through April 5, 1998, the first date that the holders could
have required redemption.
 
     As a result of the Company's initial public offering in January 1997, the
Series A CPS and Series B CPS were converted into 1,021,809 shares of common
stock of the Company.
 
  (c) Stock Options
 
     The Company periodically grants stock options to encourage stock ownership
by, and retain the services of, certain key employees. Options granted are
determined at the discretion of the Board of Directors. All options granted are
earned over a five-year vesting period at 20% per year, and expire at the
earlier of three months after termination of employment or ten years from date
of grant.
 
     In October 1996, the Board of Directors of the Company adopted the
Medirisk, Inc. 1996 Stock Incentive Plan (the "Incentive Plan") and the
Medirisk, Inc. Non-Management Directors' Stock Option Plan (the "Directors'
Plan"). A total of 580,645 shares of common stock have been reserved for
issuance under the Incentive Plan and 100,000 shares of common stock have been
reserved for issuance under the Directors' Plan.
 
     The Company has elected to follow APB Opinion No. 25 and related
interpretations in accounting for its stock options. Under APB Opinion No. 25,
because the exercise price of the Company's employee stock options equals the
market price of the underlying stock on the date of grant, no compensation
expense is recognized. However, SFAS 123 requires presentation of pro forma net
earnings (loss) and pro forma earnings (loss) per share as if the Company had
accounted for its employee stock options granted subsequent to December 31, 1994
under the fair value method of that statement. The pro forma effect for 1995 is
not material. For purposes of pro forma disclosure, the estimated fair value of
the options is amortized to expense over the vesting period. Under the fair
value method, the Company's net loss and loss per share would have been
increased as follows:
 
<TABLE>
<CAPTION>
                                                               1997           1996
                                                            -----------    -----------
<S>                                                         <C>            <C>
Net loss..................................................  $(3,062,437)   $(7,239,628)
Loss per share............................................  $     (0.78)   $     (4.71)
</TABLE>
 
     Because SFAS 123 is applicable only to options granted subsequent to
December 31, 1994, and the options generally have a five-year vesting period,
the pro forma effect will not be fully reflected until 1999.
 
     The per share weighted-average fair values of stock options granted during
1997 and 1996 were $7.02 and $0.25, respectively, on the date of grant using the
Black-Scholes option-pricing model with the following assumptions:
 
<TABLE>
<CAPTION>
                                                               1997      1996
                                                              -------   -------
<S>                                                           <C>       <C>
Expected volatility.........................................    66%       0%
Expected dividend yield.....................................   none      none
Risk-free interest rate.....................................    6%        6%
Expected life of options....................................  7 years   7 years
</TABLE>
 
                                       49
<PAGE>   51
 
     The following table summarizes option plan activity for the years ended
December 31, 1997, 1996, and 1995:
 
<TABLE>
<CAPTION>
                                                                OPTION PRICE PER SHARE
                                                              --------------------------
                                                                                WEIGHTED
                                                    SHARES         RANGE        AVERAGE
                                                    -------   ---------------   --------
  <S>                                               <C>       <C>               <C>
  Options outstanding at December 31, 1994........  197,382   $0.30 - 0.64143   $0.33428
  Granted.........................................   63,661           0.64143    0.64143
  Exercised.......................................   (6,496)             0.30       0.30
  Canceled........................................  (37,027)   0.30 - 0.64143    0.36068
                                                    -------
  Options outstanding at December 31, 1995........  217,520    0.30 - 0.64143    0.42070
  Granted.........................................  176,731           0.64143    0.64143
  Exercised.......................................  (11,693)   0.30 - 0.64143    0.58452
  Canceled........................................  (63,630)   0.30 - 0.64143    0.57471
                                                    -------
  Options outstanding at December 31, 1996........  318,928    0.30 - 0.64143    0.50628
  Granted.........................................  335,877       7.625-11.00    9.45027
  Exercised.......................................  (20,243)     0.30 - 7.625    5.03626
  Canceled........................................  (60,240)     0.30 - 7.625    6.66576
                                                    -------
  Options outstanding at December 31, 1997........  574,322      0.30 - 11.00    4.93386
                                                    =======
  Options exercisable at December 31, 1997........  160,196   $0.30 - 0.64143   $0.39429
                                                    =======   ===============   ========
</TABLE>
 
     The following table summarizes information about options outstanding and
exercisable at December 31, 1997:
 
<TABLE>
<CAPTION>
                                 OPTIONS OUTSTANDING                        OPTIONS EXERCISABLE
                  -------------------------------------------------   -------------------------------
                      NUMBER          WEIGHTED-                           NUMBER
                  OUTSTANDING AT       AVERAGE         WEIGHTED-      EXERCISABLE AT     WEIGHTED-
   RANGE OF        DECEMBER 31,       REMAINING         AVERAGE        DECEMBER 31,       AVERAGE
EXERCISE PRICES        1997        CONTRACTUAL LIFE  EXERCISE PRICE        1997        EXERCISE PRICE
---------------   --------------   ----------------  --------------   --------------   --------------
<C>               <C>              <S>               <C>              <C>              <C>
$ 0.30 -  5.00       303,405       78 months           $ 0.51019         160,196          $0.39429
  5.00 - 10.00        64,960       113                   7.56250              --                --
 10.00 - 15.00       205,957       118                  10.62138              --                --
                     -------       ----------------    ---------         -------          --------
                     574,322       96 months           $ 4.93386         160,196          $0.39429
                     =======       ================    =========         =======          ========
</TABLE>
 
  (d) Stockholders' Agreement (see note 8(h))
 
     The Company is party to a Stockholders' Agreement (the "Stockholders'
Agreement") among all preferred and common stockholders of the Company which
includes restrictions and requirements, certain of which are disclosed below.
The Stockholders' Agreement establishes the composition of the Company's Board
of Directors and provides for restrictions on the transfer of the Company's
shares. Additionally, the Stockholders' Agreement provided for a one-time
dividend to Series A CPS holders equivalent to 4% of the original purchase price
of the Series A CPS. The dividend was cumulative and accrued from April 5, 1993
to April 5, 1994. In no event could the Series A CPS onetime dividend be paid
until payment in full of the senior subordinated note payable. This dividend
payable was classified as noncurrent at December 31, 1996.
 
     The Company was required to reserve at all times common shares sufficient
to satisfy the exercise of all outstanding stock options and warrants, and to
satisfy the conversion of all Series A CPS and Series B CPS.
 
     As a result of the Company's initial public offering in January 1997, the
Stockholders' Agreement was terminated and the dividend payable was paid (see
note 8(h)).
 
                                       50
<PAGE>   52
 
  (e) Certain Common Stock Transactions
 
     In July 1994, 116,928 shares of common stock held in treasury were issued
to a stockholder in exchange for an unsecured promissory note of $75,000. The
note bore interest at 8.25% and was payable in three annual installments of
$25,000 each through 1997. A total of $39,000 was repaid on the note and the
remaining balance of $36,000 was forgiven in 1996 as consideration for entering
into a new employment agreement.
 
  (f) Warrants
 
     In 1993, the Company obtained $300,000 in financing through the issuance of
6% convertible unsecured promissory notes with attached warrants to acquire the
Company's common stock. Because the exercise price of the attached warrants
exceeded the fair value of the common stock, the Company allocated the $300,000
of proceeds to notes payable. The notes were convertible into the Company's
Series A CPS at a conversion price of $1.00 per share. In 1994, the notes
payable of $300,000 and accrued interest of $18,000 were converted into 318,000
shares of the Company's Series A CPS. The common stock purchase warrants give
the holders the right to acquire 194,880 shares of the Company's common stock at
an exercise price of $1.54 per share. The common stock purchase warrants expire
on June 23, 1998.
 
     Also, as discussed in note 5, in March 1996, the Company issued to HPSC
warrants to purchase 298,150 shares of the Company's common stock at an exercise
price of $.015 per share. The common stock purchase warrants were exercised
subsequent to December 31,1997.
 
  (g) Common Stock Reverse Split
 
     In December 1996, the Company's Board of Directors approved an amendment to
its certificate of incorporation which effected a 0.6496-for-one reverse stock
split. All references to common stock, stock options, and warrants in these
consolidated financial statements have been adjusted to reflect this amendment
as if it had occurred prior to January 1, 1995.
 
  (h) Initial Public Offering
 
     On January 31, 1997, the Company sold 2,300,000 shares of its common stock
in an initial public offering in which it received approximately $22,626,000,
net of offering expenses of approximately $750,000. As a result of the
consummation of the offering, the Series A CPS and Series B CPS were converted
into 1,021,809 shares of common stock of the Company, the HPSC Agreement was
terminated, and the Stockholders' Agreement was terminated. In addition, all of
the Company's dividends payable and debt, excluding obligations under capital
leases, were repaid.
 
(9) MAJOR CUSTOMER
 
     For the years ended December 31, 1997, 1996 and 1995, one customer
accounted for approximately 16%, 15%, and 9%, respectively, of total revenues.
 
(10) NOTE RECEIVABLE FROM OFFICER
 
     In June 1996, the Company loaned $112,500 to an officer of the Company in
the form of an unsecured promissory note. The note is to be repaid in five equal
annual installments of $22,500 each, due and payable on the first through fifth
anniversaries of the date of the note. Interest accrues at a rate of 8.25% per
annum and is due and payable by the officer on the date each principal payment
is due. The first annual installment of $22,500 was paid in June 1997.
 
                                       51
<PAGE>   53
 
                                   SECTION S
 
                         FINANCIAL STATEMENT SCHEDULES
 
                                       52
<PAGE>   54
 
                                                                     SCHEDULE II
 
                          INDEPENDENT AUDITORS' REPORT
 
The Board of Directors and Shareholders
Medirisk, Inc.
 
     Under date of February 6, 1998, we reported on the consolidated balance
sheets of Medirisk, Inc. and subsidiaries as of December 31, 1997 and 1996, and
the related consolidated statements of operations, stockholders' equity
(deficit), and cash flows for each of the years in the three-year period ended
December 31, 1997, as contained in the annual report on Form 10-K for the year
1997. In connection with our audits of the aforementioned consolidated financial
statements, we also audited the related consolidated financial statement
schedule included in the annual report on Form 10-K for the year 1997. This
financial statement schedule is the responsibility of the Company's management.
Our responsibility is to express an opinion on this financial statement schedule
based on our audits.
 
     In our opinion, such financial statement schedule, when considered in
relation to the basic consolidated financial statements taken as a whole,
presents fairly, in all material respects, the information set forth therein.
 
                                          /s/  KPMG PEAT MARWICK LLP
 
Atlanta, Georgia
February, 6, 1998
 
                                       53
<PAGE>   55
 
                                                                     SCHEDULE II
 
                        MEDIRISK, INC. AND SUBSIDIARIES
 
                       VALUATION AND QUALIFYING ACCOUNTS
 
<TABLE>
<CAPTION>
                                                                 ADDITIONS
                                                        ---------------------------
                                           BALANCE AT                    CHARGES TO
                                           BEGINNING      CHARGES TO     COSTS AND       NET        BALANCE AT
DESCRIPTION                                OF PERIOD    OTHER ACCOUNTS    EXPENSES    DEDUCTIONS   END OF PERIOD
-----------                                ----------   --------------   ----------   ----------   -------------
<S>                                        <C>          <C>              <C>          <C>          <C>
December 31, 1995
  Allowance for doubtful accounts........        --             --             --           --             --
December 31, 1996
  Allowance for doubtful accounts........        --         47,439(1)      50,000           --         97,439
December 31, 1997
  Allowance for doubtful accounts........    97,439        150,000(1)      92,000      191,882        147,557
</TABLE>
 
---------------
 
(1) Represents beginning balance in allowance for doubtful accounts of acquired
    companies.
 
                                       54
<PAGE>   56
 
                                   SIGNATURES
 
     Pursuant to the requirements of Section 13 or 15(d) of the Securities
Exchange Act of 1934, the Registrant has duly caused this report to be signed on
its behalf by the undersigned, thereunto duly authorized, on May 20, 1998.
 
                                          MEDIRISK, INC.
 
                                          By:   /s/ KENNETH M. GOINS, JR.
                                            ------------------------------------
                                                   Kenneth M. Goins, Jr.
                                                  Executive Vice President
 
                               POWER OF ATTORNEY
 
     Pursuant to the requirements of the Securities Exchange Act of 1934, this
Report on Form 10-K/A has been signed by the following persons on behalf of the
Registrant in the capacities and on May 20, 1998.
 
<TABLE>
<CAPTION>
                      SIGNATURE                                     TITLE                    DATE
                      ---------                                     -----                    ----
<C>                                                    <S>                              <C>
                          *                            Chairman, Chief Executive        March 26, 1998
-----------------------------------------------------    Officer, President (principal
                   Mark A. Kaiser                        executive officer) and
                                                         Director
 
              /s/ KENNETH M. GOINS, JR.                Chief Financial Officer,         March 26, 1998
-----------------------------------------------------    Executive Vice President
                Kenneth M. Goins, Jr.                    (principal financial officer)
 
               /s/ THOMAS C. KUHN III                  Vice President -- Finance and    March 26, 1998
-----------------------------------------------------    Administration and Controller
                 Thomas C. Kuhn III                      (principal accounting
                                                         officer)
 
                          *                            Director                         March 26, 1998
-----------------------------------------------------
                   Keith O. Cowan
 
                          *                            Director                         March 26, 1998
-----------------------------------------------------
                   Michael J. Finn
 
                          *                            Director                         March 26, 1998
-----------------------------------------------------
             William M. McClatchey, M.D.
 
                          *                            Director                         March 26, 1998
-----------------------------------------------------
                James K. Murray, III
 
                          *                            Director                         March 26, 1998
-----------------------------------------------------
                  Robert P. Pinkas
 
           *By: /s/ KENNETH M. GOINS, JR.
----------------------------------------------------
                  Attorney-in-Fact
</TABLE>
 
                                       55