<PAGE>   1


                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                              --------------------

                                    FORM 10-K

[X]  ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE 
     ACT OF 1934

     For the fiscal year ended September 30, 1997

[ ]  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES 
     EXCHANGE ACT OF 1934

                         COMMISSION FILE NUMBER 0-28182
                                                -------
 
                            TRANSITION SYSTEMS, INC.
                            ------------------------
             (Exact Name of Registrant as Specified in Its Charter)

       MASSACHUSETTS                                      04-2887598
       -------------                                      ----------
       (State or Other Jurisdiction                       (I.R.S. Employer
       of Incorporation or Organization)                  Identification Number)

       ONE BOSTON PLACE, BOSTON, MASSACHUSETTS             02108
       ---------------------------------------             -----
       (Address of Principal Executive Offices)            (Zip Code)

       Registrant's Telephone Number, including Area Code: (617) 723-4222
                                                           --------------
  
Securities registered pursuant to Section 12(b) of the Act:

                                      None

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

                     Common Stock, $.01 par value per share

        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 the 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. [ ]

        As of December 22, 1997, the aggregate market value of the voting stock
held by non-affiliates of the registrant was approximately $169,107,122, based
on the last sale price of such stock on such date, as reported by the Nasdaq
National Market. For purposes of the foregoing calculation, the Company has
assumed that each director, executive officer and beneficial owner of 5% or
more of the voting stock of the Company is an affiliate. This determination of
affiliate status is not necessarily a conclusive determination for other
purposes.

        As of December 22, 1997, there were outstanding 17,765,017 shares of
common stock, $.01 par value per share (the "Common Stock"), and 356,262 shares
of non-voting common stock, $.01 par value per share (the "Non-Voting Common
Stock").

                       DOCUMENTS INCORPORATED BY REFERENCE

        Certain portions of the registrant's Definitive Proxy Statement for its
Annual Meeting of Stockholders to be held on February 10, 1998 are incorporated
by reference into Part III of this Annual Report on Form 10-K.



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                                     PART I

ITEM 1A.   RISK FACTORS

        THIS FORM 10-K CONTAINS CERTAIN "FORWARD-LOOKING STATEMENTS" WITHIN THE
MEANING OF SECTION 27A OF THE SECURITIES ACT OF 1933, AS AMENDED (THE
"SECURITIES ACT"), AND SECTION 21E OF THE SECURITIES EXCHANGE ACT OF 1934, AS
AMENDED (THE "EXCHANGE ACT"). THESE FORWARD-LOOKING STATEMENTS REPRESENT THE
COMPANY'S BELIEFS, EXPECTATIONS AND INTENTIONS CONCERNING FUTURE EVENTS,
INCLUDING, WITHOUT LIMITATION, FINANCIAL MATTERS, PLANS AND OBJECTIVES OF
MANAGEMENT FOR FUTURE OPERATIONS, PRODUCTS AND SERVICES, THE FUTURE ECONOMIC
PERFORMANCE OF THE COMPANY, AND THE ASSUMPTIONS UNDERLYING SUCH BELIEFS,
EXPECTATIONS AND INTENTIONS. THE WORDS "EXPECT," "ANTICIPATE," "INTEND," "PLAN,"
"BELIEVE," "SEEK," "ESTIMATE" AND SIMILAR EXPRESSIONS ARE INTENDED TO IDENTIFY
SUCH FORWARD-LOOKING STATEMENTS. THIS FORM 10-K ALSO CONTAINS OTHER
FORWARD-LOOKING STATEMENTS. SUCH STATEMENTS ARE NOT GUARANTIES OF FUTURE
PERFORMANCE, AND INVOLVE CERTAIN RISKS AND UNCERTAINTIES THAT COULD CAUSE THE
COMPANY'S FUTURE RESULTS TO DIFFER MATERIALLY FROM THOSE EXPRESSED IN ANY
FORWARD-LOOKING STATEMENTS MADE BY OR ON BEHALF OF THE COMPANY. MANY OF SUCH
FACTORS ARE BEYOND THE COMPANY'S ABILITY TO CONTROL OR PREDICT. READERS ARE
ACCORDINGLY CAUTIONED NOT TO PLACE UNDUE RELIANCE ON FORWARD-LOOKING STATEMENTS.
THE COMPANY DISCLAIMS ANY INTENT OR OBLIGATION TO UPDATE PUBLICLY ANY
FORWARD-LOOKING STATEMENTS WHETHER IN RESPONSE TO NEW INFORMATION, FUTURE EVENTS
OR OTHERWISE. THESE FORWARD-LOOKING STATEMENTS ARE FURTHER QUALIFIED BY
IMPORTANT FACTORS THAT COULD CAUSE ACTUAL RESULTS TO DIFFER MATERIALLY FROM
THOSE IN THE FORWARD-LOOKING STATEMENTS, INCLUDING, WITHOUT LIMITATION, THOSE
DISCUSSED IN THE FOLLOWING RISK FACTORS.

        FLUCTUATIONS IN ANNUAL AND QUARTERLY PERFORMANCE. The Company has
experienced a seasonal pattern in its operating results, in which the first
quarter of each fiscal year typically has the lowest revenue and net income,
frequently lower than the last quarter of the previous fiscal year, and the
fourth quarter of each fiscal year typically has the highest revenue and net
income. The Company believes that this seasonal pattern is attributable in part
to its sales compensation programs, which historically have been based on the
attainment of fiscal year goals. The Company's revenue can be expected to vary
significantly as a result of changes in order backlog, cancellation or
postponement of product deliveries, fluctuations in demand for existing products
and delays in the implementation of the Company's products, whether caused by
the Company or the customer. The Company relies on sales under large contracts
of a small number of products to a small number of customers, and the sales
cycles for most of the Company's products are long and difficult to predict,
resulting in variability of its revenues. The unpredictability of revenues could
in any quarter result in a shortfall relative to quarterly expectations. A
significant portion of the Company's expenses are relatively fixed and are based
in large part on the Company's forecasts of future sales. If revenues are below
expectations in any given period, the Company's inability to adjust spending to
compensate fully for the lower revenues may magnify the adverse effect of such a
shortfall on the Company's operating results. Other factors which may contribute
to fluctuations in operating results include: the Company's ability to develop,
introduce and market new products and product enhancements and the timing and
extent of any market acceptance of such products; the Company's ability to
respond to new product introductions and price reductions by its competitors;
the timing, cancellation or rescheduling of significant orders; the availability
of third-party software provided in conjunction with the Company's products and
changes in the cost of such third-party software; the Company's ability to
attract, retain and motivate qualified personnel; the timing and amount of
research and development and other expenditures by the Company; and general
economic conditions. Delays in material payments under customer contracts could
adversely affect the availability of funds for the Company and could result in
the need for additional borrowing to fund current operations. Additionally, any
delays in the Company's performance under these contracts could have a material
adverse effect on period-to-period earnings. Accordingly, the Company believes
that period-to-period comparisons of results of operations are not necessarily
meaningful and should not be relied upon as any indication of future
performance.

        LONG SALES AND IMPLEMENTATION CYCLES. The Company's sales process is
often subject to delays associated with the lengthy approval process that
typically accompanies a customer's significant capital expenditures. During this
process, the Company expends substantial time, effort and funds demonstrating
the product, preparing a contract proposal and negotiating the contract. Any
failures by the Company to procure a signed agreement after expending
significant time, effort and funds could have a material adverse effect on the
Company's business, financial condition and results of operations. Even after an
agreement has been signed, the implementation of the Company's software products
generally requires a significant commitment of resources by the Company and by
the customer. Full implementation of the Company's software system at a customer
site typically takes from three to twelve months. 



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The length of time required to complete an implementation depends on many
factors, some of which are outside the control of the Company, including the
state of the customer's existing information systems and the customer's ability
to commit the personnel and other resources necessary to complete elements of
the implementation process for which the customer is responsible. In certain
instances, the implementation process has been prolonged substantially as a
result of delays attributable to the customer. The Company's agreements with
certain of its customers provide for a reduction in the implementation fee if,
among other things, the Company fails to meet certain implementation milestones
on a timely basis. Delays in implementation of substantial contracts have in the
past contributed, and may in the future contribute, to the Company's failure to
achieve expected revenue levels in a given quarter. The failure of the Company
to maintain timely and cost-efficient implementation procedures could have a
material adverse effect on the Company's business, financial condition and
results of operations. See "Item 1B. Business -- Sales and Marketing" and "Item
7. Management's Discussion and Analysis of Financial Condition and Results of
Operations."

        DEPENDENCE ON KEY PERSONNEL. The Company's future success depends to a
significant extent on its executive officers, including Robert F. Raco, Donald
C. Cook and Christine Shapleigh, M.D., who have been with the Company since its
inception, and certain other senior operational, technical and sales and
marketing personnel. The loss of the services of any of these individuals could
have a material adverse effect on the Company's business, financial condition
and results of operations. Although each of the three named individuals has
signed an employment agreement with the Company which includes non-competition
covenants, there can be no assurance that any of these individuals or any other
key employee will not voluntarily terminate his or her employment with the
Company. The Company believes that its future success will also depend
significantly on its ability to attract, motivate and retain additional
highly-skilled operational, technical and sales and marketing personnel.
Competition for such personnel is intense, and there can be no assurance that
the Company will be successful in attracting, assimilating and retaining the
personnel required to grow and operate profitably.

        DEPENDENCE ON A LIMITED NUMBER OF PRODUCTS. The Company expects to
derive a significant portion of its revenues in fiscal 1998 and in future years
from a limited number of products and services. Most of this revenue is expected
to derive from licenses of the Company's core Transition II system and a limited
number of other add-on products and services related to Transition II. As a
result, the reduction, delay or cancellation of orders for this product would
have a material adverse effect on the Company's business, financial condition
and results of operations.

        DEPENDENCE ON NEW PRODUCTS; TECHNOLOGICAL OBSOLESCENCE. The Company's
success has depended and will continue to depend on its ability to develop and
introduce new products and enhanced versions of existing products in response to
rapidly changing demand for technologically-advanced decision support systems
for the health care industry. The development of new and enhanced products for
this market is a complex and uncertain process requiring high levels of
innovation and accurate anticipation of technological and market trends. There
can be no assurance that the Company will be able to innovate, develop or market
new products and product enhancements successfully, that any new products or
product enhancements will gain market acceptance or that the Company will be
able to respond effectively to technological changes or product announcements by
competitors. The Company's failure to do any of these things could have a
material adverse effect on the Company's business, financial condition and
results of operations.

        INTENSELY COMPETITIVE MARKET. The market for health care information
systems and services is intensely competitive and rapidly evolving. The Company
competes directly with vendors of decision support systems for health care
providers, a number of which are larger than the Company. Other vendors of
health care information systems, including vendors currently targeting decision
support systems for payors, may enter the markets in which the Company competes.
The Company also faces competition from internal management information systems
departments of large hospital networks, some of which have developed or may
develop financial and clinical outcomes management systems or other cost control
solutions. The Company believes that the principal competitive factors
influencing the market for its products include vendor and product reputation,
product architecture, functionality and features, ease of use, rapidity of
implementation, quality of customer support, product performance and price.
There can be no assurance that the Company will be able to compete successfully
with respect to any of these factors. Moreover, many of the Company's current
and prospective competitors have substantially greater financial, technical,
managerial, sales, marketing and other resources than the Company and may be
able to respond more effectively to new or emerging technologies and changes in
customer requirements, initiate or withstand significant price decreases or
devote greater resources to the development, promotion and sale of their
products than the Company. In addition, current and potential competitors have
established or may establish cooperative relationships among themselves or with
third parties to increase their ability to offer products that address the needs
of the Company's customers. New competitors or new alliances among competitors
may emerge and quickly acquire market share. Competition may result in
significant price reductions, decreased gross margins, loss of market share and
reduced acceptance of the Company's products. The Company has on occasion
experienced price pressure attributable to competition. There can be no
assurance that the Company will be able to compete successfully in the future or
that competition will not have a material adverse effect on the 




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Company's business, financial condition and results of operations. See "Item 1B.
Business -- Research and Product Development" and " -- Competition."

        CONSOLIDATION AND UNCERTAINTY IN THE HEALTH CARE INDUSTRY. Many health
care providers are consolidating to create larger health care delivery
enterprises with greater regional market power. Such consolidation could erode
the Company's target market. In addition, the resulting enterprises could have
greater bargaining power, which could erode the price of the Company's products
and services. The reduction in the size of the Company's target market or the
failure of the Company to maintain adequate price levels could have a material
adverse effect on the Company's business, financial condition and results of
operations. The health care industry is also subject to changing political,
economic and regulatory influences that may affect the procurement practices and
operations of participants in the health care industry. During the past several
years, the United States health care industry has been subject to an increase in
governmental regulation and reform proposals. These reforms, if enacted, may
increase governmental involvement in health care, lower reimbursement rates and
otherwise change the operating environment for the Company's customers. Health
care industry participants may react to these proposals and the uncertainty
surrounding them by curtailing or deferring investments, including those for the
Company's products and services. The Company cannot predict with any certainty
what impact, if any, such legislative or market-driven reforms could have on its
business, financial condition and results of operations. See "Item 1B. Business
-- Industry Background."

        RISKS ASSOCIATED WITH SIGNIFICANT GOVERNMENT CONTRACT. The Company
derived approximately 5.7%, 7.0% and 5.2% of its revenues in fiscal 1995, 1996
and 1997, respectively, from a single contract, with subsequent modifications,
entered into with the United States Department of Veterans Affairs (the "VA").
There can be no assurance that the VA will continue to purchase the Company's
products and services in similar amounts. Changes in the VA's procurement
priorities or significant reductions or delays in procurement of the Company's
products could have a material adverse effect on the Company's business,
financial condition and results of operations. Moreover, the VA cannot make all
the payments required under the contract without the appropriation of the
necessary funds through the Congressional budget process. Shutdowns of the
United States government could lead to delays in the procurement process and
could contribute to a failure to appropriate funds. There can be no assurance
that the VA will not exercise its contractual right to terminate the contract at
will or that the necessary funds will be appropriated.

        QUALITY ASSURANCE AND PRODUCT ACCEPTANCE. Although the Company devotes
substantial resources to producing highly reliable software, the Company's
software and third-party software offered by the Company may from time to time
contain errors. Any such error could result in a loss of valid data, delay in
installation or delay in product releases. Because the reliability of the
Company's products is important to its customers, such errors or delays could
have a material adverse effect on the continued market acceptance of the
Company's products, could expose the Company to claims from customers and third
parties and could result in a material adverse effect on the Company's business,
financial condition and results of operations. Although the Company's license
agreements with customers contain contractual limitations on liability, there
can be no assurance that such contractual provisions will provide adequate
protection against claims that may be asserted against the Company.

        DEPENDENCE ON PROPRIETARY TECHNOLOGY; RISK OF INFRINGEMENT. The
Company's ability to compete effectively depends to a significant extent on its
ability to protect its proprietary information. The Company relies primarily on
copyright and trade secret laws, confidentiality procedures and licensing
arrangements to protect its intellectual property rights. The Company has not
filed any patent applications with respect to its intellectual property. The
Company generally enters into confidentiality agreements with its consultants
and employees and generally limits access to and distribution of its technology,
software and other proprietary information. Although the Company intends to
defend its intellectual property, there can be no assurance that the steps taken
by the Company to protect its proprietary information will be adequate to
prevent misappropriation of its technology or that the Company's competitors
will not independently develop technologies that are substantially equivalent or
superior to the Company's technology. The Company is also subject to the risk of
alleged infringement by it of intellectual property rights of others. Although
the Company is not currently aware of any material infringement claims with
respect to the Company's current or future products, there can be no assurance
that third parties will not assert such claims. Any such claims could require
the Company to enter into license arrangements or could result in protracted and
costly litigation, regardless of the merits of such claims. No assurance can be
given that any necessary licenses will be available or that, if available, such
licenses can be obtained on commercially reasonable terms. Furthermore,
litigation may be necessary to enforce the Company's intellectual property
rights, to protect the Company's trade secrets, to determine the validity and
scope of the proprietary rights of others or to defend against claims of
infringement. Such litigation could result in substantial costs and diversion of
resources and could have a material adverse effect on the Company's business,
financial condition and results of operations. See "Item 1B. Business
Intellectual Property."

        DEPENDENCE ON THIRD-PARTY TECHNOLOGY LICENSES. The Company's products
are dependent upon licenses from a number of third-party vendors, including
Computer Corporation of America (CCA), Oracle Corporation, Sterling Software
(United 




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States of America), Inc., HealthVISION, Inc. and HCIA Inc. ("HCIA") and Premier,
Inc. with respect to certain database management systems ("DBMSs"), other
software components and clinical benchmarking data. Most of these licenses
expire within one to four years, can be renewed only by mutual consent and may
be terminated if the Company breaches the terms of the license and fails to cure
the breach within a specified period of time. There can be no assurance that
such licenses will continue to be available to the Company on commercially
reasonable terms, if at all. The loss of or inability to maintain any of these
licenses could result in the discontinuation of, or delays or reductions in,
product shipments unless and until equivalent technology is identified, licensed
and integrated with the Company's software. Any such discontinuation, delay or
reduction would have a material adverse effect on the Company's business,
financial condition and results of operations. Most of the Company's third-party
licenses, including its license from New England Medical Center, Inc. ("NEMC")
for the original version of the Transition I software, are non-exclusive, and
there can be no assurance that the Company's competitors will not obtain
licenses to and utilize such technology in competition with the Company. There
can be no assurance that the vendors of technology utilized in the Company's
products will continue to support such technology in its current form, nor can
there be any assurance that the Company will be able to modify its own products
to adapt to changes in such technology. In addition, there can be no assurance
that financial or other difficulties that may be experienced by such third-party
vendors will not have a material adverse effect upon the technologies
incorporated in the Company's products, or that, if such technologies become
unavailable, the Company will be able to find suitable alternatives.

        RISK OF PRODUCT LIABILITY CLAIMS. Certain of the Company's products
provide applications that relate to patient medical histories and treatment
plans. Any failure by the Company's products to provide accurate and timely
information could result in product liability claims against the Company by its
customers or their patients. A successful claim brought against the Company
could have a material adverse effect on the Company's business, financial
condition and results of operations. Even unsuccessful claims could result in
the expenditure of funds in litigation, as well as diversion of management time
and resources. To date, no product liability claims have been made against the
Company. Nonetheless, there can be no assurance that the Company will not be
subject to such claims.

        RISKS ASSOCIATED WITH IDENTIFYING AND INTEGRATING ACQUISITIONS. The
Company intends to grow, in part, through acquisitions of complementary
products, technologies and businesses. The Company's ability to expand
successfully through acquisitions depends on many factors, including the
successful identification and acquisition of products, technologies or
businesses and management's ability to integrate and operate the acquired
products, technologies or businesses effectively. There is significant
competition for acquisition opportunities in the health care information systems
industry, which may intensify due to consolidation in the industry. The Company
will compete for acquisition opportunities with other companies that have
significantly greater financial and managerial resources. There can be no
assurance that the Company will be successful in acquiring any complementary
products, technologies or businesses or that the Company will be able to
integrate successfully any acquired products, technologies or businesses into
its current business and operations. The failure to integrate successfully any
significant products, technologies or businesses could have a material adverse
effect on the Company's business, financial condition and results of operations.

        RISKS ASSOCIATED WITH GOVERNMENT REGULATORY PROPOSALS. The United States
Food and Drug Administration (the "FDA") has promulgated a draft policy for the
regulation of certain computer products as medical devices under the 1976
Medical Device Amendments to the Federal Food, Drug and Cosmetic Act (the "FDC
Act"). To the extent that particular computer software is determined to be a
medical device under the policy, developers and vendors of such software could
be required, depending on the product, to: (i) register and list their products
with the FDA; (ii) notify the FDA and demonstrate substantial equivalence to
other products on the market before marketing such products; or (iii) obtain FDA
approval by demonstrating safety and effectiveness before marketing a product.
In addition, such products would be subject to the FDC Act's general controls,
including those relating to good manufacturing practices and adverse experience
reporting. Although it is not possible to anticipate the final form of the FDA's
policy, the Company expects that, whether or not the draft is finalized, the FDA
is likely to become increasingly active in regulating computer software that is
intended for use in health care settings. The FDA, if it chooses to regulate
such software, can impose extensive requirements governing pre- and post-market
conditions such as device investigation, approval, labeling and manufacturing.
Compliance with such requirements, if imposed, could be burdensome,
time-consuming and expensive. There can be no assurance that such further
regulation, if adopted, will not have a material adverse effect on the Company's
business, financial condition and results of operations.





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        POSSIBLE VOLATILITY OF STOCK PRICE. The market price of the Common Stock
has been, and could in the future be, subject to wide fluctuations in response
to quarterly variations in operating results, announcements of technological
innovations or new products by the Company or its competitors, trends in, or
changes in priorities with respect to health care spending in the United States
and certain other countries and other events or factors. In addition, the stock
market has experienced extreme price and volume fluctuations that have
particularly affected the market prices for many high technology companies.
These broad market fluctuations may adversely affect the market price of the
Common Stock. See "Item 5. Market for Registrant's Common Equity and Related
Stockholder Matters--Price Range of Common Stock."

        EFFECT OF CERTAIN CHARTER AND BY-LAW PROVISIONS AND ANTI-TAKEOVER
PROVISIONS; POSSIBLE ISSUANCES OF PREFERRED STOCK. The Company's Articles of
Organization, its By-Laws and certain Massachusetts laws contain provisions that
may discourage acquisition bids for the Company and that may reduce the
temporary fluctuations in the trading price of the Common Stock which are caused
by accumulations of stock, thereby depriving stockholders of certain
opportunities to sell their stock at temporarily higher prices. The Company's
Articles of Organization permit the issuance of shares of Preferred Stock
without stockholder approval and upon such terms as the Board of Directors may
determine. The rights of the holders of Common Stock will be subject to, and may
be adversely affected by, the rights of the holders of any Preferred Stock that
may be issued in the future. The issuance of Preferred Stock could have the
effect of making it more difficult for a third party to acquire, or of
discouraging a third party from acquiring, a majority of the outstanding stock
of the Company. The Company has no present plans to issue any shares of
Preferred Stock.

        ABSENCE OF DIVIDENDS. The Company does not anticipate paying cash
dividends on the Common Stock in the foreseeable future. See "Item 5. Market for
Registrant's Common Equity and Related Stockholder Matters--Dividends."





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ITEM 1B.   BUSINESS

        Transition Systems, Inc. provides management information technology to
hospitals, integrated delivery networks, physician groups and other healthcare
organizations. Using TSI products, these organizations are able to increase
efficiency, improve quality of care and lower the cost of care delivery. TSI
product lines span the health care organization's information technology needs,
providing data integration services, master person identifier solutions, disease
management products and a clinical data repository as well as enterprise wide
financial, operational and clinical decision support in a real time environment.

INDUSTRY BACKGROUND

        Pressure by employers, health insurers and government payors to control
health care costs is driving a movement towards managed care and new forms of
reimbursement for health care providers. These new managed care reimbursement
models, including capitation, case rates, per diems and other fixed payment
arrangements, are shifting the financial risk of providing care from payors to
providers. Payors are also demanding that providers differentiate their services
by demonstrating quality of care. These and other pressures are leading to
industry consolidation and the formation of multi-entity provider networks,
including integrated delivery networks ("IDNs").

        These changes have altered the information needs of health care
providers trying to compete in this new environment. Institutions must
understand their costs in order to manage the profitability of their clinical
processes and their many types of managed care contracts. Institutions also need
to be able to compare practice patterns and outcomes of different clinicians or
affiliated providers and to monitor utilization and outcomes on a continuous
basis. Further, systems must be put in place that help clinicians translate
their new understanding of improved care delivery into daily clinical
operations. Information tools are required at the point of care that help
clinicians improve their overall productivity as well as insure quality and cost
effective care.

        The existing information systems installed in most provider
organizations were developed to meet the needs of providers in a fee-for-service
environment. These systems are typically transaction-based departmental systems
(e.g., laboratory, pharmacy, radiology and nursing) focused on recording billing
information for a single department. They are suitable primarily for collecting
financial data, rather than for analyzing clinical and operational information.
Existing departmental systems generally have been designed to operate as stand-
alone systems and typically are limited in their ability to share data. Because
these legacy systems do not integrate clinical, operational and financial data
across the enterprise, they do not provide the information the Company believes
is necessary for managers or clinicians to evaluate the cost of care by patient,
clinical specialty or episode of care. Further, these systems were designed
mainly to capture charges in a fee-for-service environment, rather than to lower
costs, improve utilization and demonstrate quality.

THE TSI SOLUTION

        All TSI products extend the core concepts of management information,
accountability and control. These products are based on the foundation of
providing information technology tools that enable healthcare organizations to:
analyze past clinical, operational and financial practices; model new approaches
for the future; transform those models into actionable plans; and, measure
actual practice against those plans. Recent additions to the TSI product lines
have extended these capabilities to include disease-specific tools that focus on
improving the day to day efficiency and effectiveness of care providers as well
as the real-time measurement of clinical protocols. TSI products have also
expanded to include clinical data repository technology.

        The focus of TSI products is to empower the enterprise with information
that can be used to change and improve the clinical and financial performance of
the organization. More than 1,000 healthcare organizations in the United States
and abroad have chosen TSI as their information technology solution to support
their ongoing improvement efforts.

        TSI's products are based on an open, three-tiered client/server
architecture, providing high flexibility and ease-of-use. TSI's products run in
a Windows client environment and support multiple server platforms, including
mainframes, AS/400s and UNIX-based systems.

PRODUCTS

        TSI's initial product, Transition I, was introduced in 1985. Since 1985,
TSI has developed new products on a regular basis. The 



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Company's current product offerings are as follows:

        TRANSITION II. At the core of the Transition family of products is
Transition II, an integrated decision support system designed to provide the
clinical, operational and financial information that is needed to manage and
improve the delivery of care. Together, the clinical and financial components of
Transition II enable an organization to: (i) delineate responsibility and
accountability for managing costs; (ii) control resource utilization and reduce
costs; (iii) measure variances from rules-based protocols on a daily basis; (iv)
manage a mix of complex reimbursement contracts by case or member; (v) analyze
and measure quantifiable improvements in the patient care process; and (vi)
develop clinical and departmental budgets and variance analyses that adjust for
actual volume and mix.

        Transition II creates a clinical and financial data repository by
integrating data from across the enterprise. The system gathers information from
the many departmental information systems within the organization through
interfaces that enable concurrent updating of distributed data. Transition II
analyzes this data in order to determine the patient-level costs of care and
identify areas for improvement. This information allows the organization to
evaluate its cost structure, make changes in clinical processes to reduce costs
and accurately price reimbursement contracts on a profitable basis. Transition
II also analyzes and measures clinical process and outcomes data, identifying
the practice patterns that most consistently result in the highest quality at
the lowest cost. In addition, the system includes capabilities for case mix,
reimbursement and utilization management, cost and profitability analysis,
strategic planning, modeling and forecasting.

        ENTERPRISE MANAGER SERIES, formerly known as Transition II for
Integrated Delivery Systems. Contains several different components that meet the
needs of emerging integrated delivery networks. This product incorporates the
functionality of Transition II and extends it across multiple entities. It also
adds capabilities designed to meet the special needs of integrated delivery
networks, such as analyses focusing on groups of patient-members and their
associated health care activities. Different types of members can be
categorized, for example, by disease type, age, sex, insurance product or
employer.

        Enterprise Manager Series includes tools to: (i) measure and monitor the
cost and quality of care longitudinally and determine where in a provider
network appropriate care can be provided most cost effectively; (ii) manage the
financial risks of capitation; (iii) provide risk pool accounting and management
both centrally and to physician groups; (iv) manage physician panels and
determine panel sizing and (v) centrally identify and consolidate multiple
patient identifiers across an enterprise and resolve them to a common master
patient index.

        TRANSITION IV. Co-developed with HealthVISION, Inc. This product brings
together the HealthVISION real time clinical data repository with the financial
and clinical decision support capabilities in Transition II. Transition IV
extends the capabilities of Transition II by providing very detailed clinical
data on which to base the analysis, clinical plans and performance measurements.
The system offers user-defined real time alerts that enable intervention to
redirect care. Benefits include: reduction of clinical re-work, more clinically
meaningful analysis, real time measurements, incorporation of financial
information. The objective of Transition IV is to enhance the quality of care by
providing real time information to guide patient care decisions.

        TRANSITION FOR QUALITY. TSI's Transition for Quality product offers
tools that complement the analytical power of Transition II's clinical component
and provides on-line case management. With Transition for Quality, an
organization can define a broad range of quality issues and identify cases for
review and follow up based on outcome measures and variance from critical paths.
Using this information, the organization can concurrently monitor the progress
and outcomes of cases and intervene in response to automatic alerts. In
addition, Transition for Quality provides healthcare organizations with
compliance tools to comply with the Joint Commission on Accreditation of
Healthcare Organization's Oryx initiative.

        TRANSITION PERSPECTIVE AND CLINICAL ABCs. These benchmarking products
offered in conjunction with Premier Inc. and HCIA, Inc., respectively enable
Transition II customers to use external benchmarking data to further support
their process improvement efforts.

        VITAL ONCOLOGY. This product which has been co-developed with the
Company's newly acquired entity, Vital Software, automates the clinical
processes unique to medical oncology while enhancing the quality of care. Vital
Oncology significantly increases the productivity of physicians and nurses,
reduces the likelihood for error, and improves patient care.

SERVICES AND SUPPORT

        IMPLEMENTATION ASSISTANCE. Almost all new sales of products and many
sales of add-on products include implementation assistance. Implementation is
carried out by a team of specialists who oversee the process on-site.
Implementation of Transition II typically takes from three to twelve months.




                                       8

<PAGE>   9


        SOFTWARE MAINTENANCE CONTRACTS. TSI offers software maintenance
contracts for all software products. Under these contracts, TSI provides ongoing
support, including updates and enhancements to the software modules and
telephone access to a Help Desk staffed by an experienced team of support
professionals.

        CONSULTING SERVICES. TSI also offers post-implementation consulting
services intended to assist customers in maximizing the benefits available
through the use of the Transition family of products. TSI's staff can assess
performance of the customer's system and advise the customer on its growing
needs. While these services do not currently constitute a major source of
revenue, the Company believes they have the potential to grow in importance.

        INTEGRATION SERVICES. TSI offers data extraction services to develop the
conversion protocols necessary to obtain data feeds from an organization's
source systems, so as to enable data from these source systems to be integrated
with data from TSI applications. Typical extractions are from general ledger,
payroll, admission/discharge/transfer, medical records abstracting, patient
billing and various departmental systems.

CUSTOMERS

        TSI's customers include a broad range of hospitals, integrated delivery
networks, managed care organizations and physician practices in the United
States and around the world. The Company's products are installed at more than
1,000 customer sites.

TECHNOLOGY

        TSI has products deployed on both two-tier client/server and three-tier
client/server/server architectures. Each of the products utilizes the
architecture strategy best suited for the data access requirements inherent to
each product. This enables the Company to provide the power and flexibility of
distributed data and processing combined with a wide range of user platforms.
For example Transition II comprises a broad range of integrated applications
that draw from a central repository of patient-level clinical and financial
data. It features an open, three-tiered client/server/server architecture that
includes, at the client level, a Microsoft Windows-compliant point-and-click
interface. The Company believes these features differentiate Transition II from
other available decision support products.

        MULTIPLE PLATFORMS. TSI's products are designed to operate with a
variety of hardware platforms, operating systems and database management
systems. This strategy enables the Company to provided a practical and
affordable solution for small and mid-size group health plans and community
hospitals as well as large teaching hospitals and vertically-integrated health
care delivery networks. Microsoft Windows (3.1, 95 and NT) is the client
standard for all products. Transition II host tier options include IBM 370/390
mainframes running the Model 204 DBMS, IBM AS/400s with DB2/400 and UNIX servers
(Hewlett-Packard HP9000 and IBM RS/6000) running the Oracle DBMS. The
application tier requires an Intel based processor. The Enterprise Manager
Series of products utilizes the Transition II architecture with a SQL Server
component for specific population studies. Transition for Quality is offered on
both the HP9000 and the RS/6000 running either Oracle or Sybase. Transition IV
repository options include UNIX servers (HP9000, RS/6000) running either the
Oracle, Sybase or Informix DBMS. The Transition IV application tier is an Intel
processor running NT with the SQL Server DBMS. Vital Oncology is an Intel
processor running NT with the SQL Server DBMS.

        THREE-TIERED CLIENT/SERVER/SERVER ARCHITECTURE. Transition II together
with the Enterprise Manager Series and benchmarking employs a three-tiered
computing architecture in which workstations (clients) and host-servers share
the work of managing and processing information. This client/server environment
allows a user to realize greater processing efficiency at a lower cost than
traditional terminal/host or PC-LAN configurations.

        The Data Server tier pulls data from an organization's disparate
transaction system databases and other data sources and batch processes it daily
into a value-added data repository. This tier performs the processing necessary
to calculate unit costs, reimbursement, quality indicators and critical path
variances. The system incorporates a variety of communications protocols,
together with data interfaces developed during the system implementation
process, to extract data from the disparate databases throughout an organization
in which transactional cost, process and outcomes information is stored,
allowing the organization to preserve its existing investment in information
technology.

        The Application Server, the middle tier, performs the value-added data
integration, storage and access required to support the clinical and financial
analysis of the data. This tier currently runs on file servers compatible with a
variety of UNIX and Windows NT 



                                       9
<PAGE>   10

platforms. This tier relies on direct data feeds from the Data Server tier and
provides SQL-compliant database structures to integrate other data sources and
to handle ad-hoc queries among all tiers of the architecture.

        The Client tier performs on-line clinical and financial analysis through
a Microsoft Windows-compliant point-and-click interface. The Transition II
application was developed using Microsoft's Visual C++ development environment
and is compatible with Windows 3.1, 3.11, Windows `95, Windows NT and other
operating environments supported by the Microsoft Foundation Classes. The
architecture has been expanded to incorporate a Visual Basic rapid development
strategy exploiting Microsoft's ActiveX, COM/DCOM and Web enabling directions.
With Transition II, there is no need to layer a separate executive information
system on top of the application. Instead, Transition II provides a graphical,
mouse-driven user interface which allows even inexperienced users to navigate
through intuitive screens and windows of information, to select the information
to be reviewed at various levels of detail and to transform numerical data into
charts and graphs. The system can be customized to set user preferences, display
styles and sorting parameters, enabling users to develop their own objects and
applications.

        The system provides tightly coupled interfaces to CCA Model 204, DB2/400
and Oracle databases. Additionally, the Transition II system integrates external
data through compliance with the ODBC (Open Database Connectivity) and OLE 2.0
(Object Linking and Embedding) protocols. ODBC provides standard SQL
connectivity to a variety of SQL-compliant relational and non-relational
databases, while the OLE 2.0 protocol provides a display, update and editing
environment for Windows programs such as Microsoft Excel, Microsoft Word and PC
SAS. As a result, additional data from a customer's legacy systems can be used
in its native form without the need for data import.

        DECISION SUPPORT OBJECTS. To facilitate use throughout an organization
of the information made available by Transition II, the Company has developed
Decision Support Objects. Decision Support Objects are graphical, Windows-based
mini-applications that simplify the task of navigating through the wealth of
data available from the Company's system by selecting, retrieving and analyzing
relevant information and presenting it in readily usable graphical, tabular or
narrative form. Each Decision Support Object is designed to guide the user
through the analysis of a particular clinical, operational or financial issue or
problem, without the need to master complex commands or data structures. For
example, the Decision Support Object for Physician Analysis enables a clinical
manager with limited computer training to examine the resource utilization of
groups of physicians at the departmental level or to review practice patterns of
individual doctors.

        TSI believes that its Decision Support Objects provide an important
competitive advantage. Other vendors have relied upon executive information
system ("EIS") solutions that are separate from the underlying decision support
system. EIS products typically extract and summarize data and present it in a
graphical format. Because the data is filtered, it is disconnected from the
source data, and the user has no control over the level of detail that is
accessible. By contrast, with TSI's Decision Support Objects, all data in the
system, not just a selected summary, may be accessed. As questions occur to the
user, he or she can navigate to any related information, "drill down" through
levels of detail to individual transactions, perform statistical analysis and
modeling on the data and generate reports in a variety of formats. There are no
artificially imposed "walls" to limit the information available to the user.


SALES AND MARKETING

        At September 30, 1997, TSI had a direct sales force of nineteen,
consisting of fourteen direct sales persons and five sales management executives
organized in three geographic regions covering the United States and Canada. The
Company's direct sales and sales management personnel are compensated through
salaries plus commissions based on quarterly and annual quotas. TSI also sells
through distributors based in New Zealand, Australia, Sweden and the
Netherlands. Distributors provide local support for implementations and ongoing
maintenance support.

        In order to better exploit its market opportunities, the Company assigns
to each direct sales person responsibility either for new account sales or for
add-on sales to the Company's existing client base. The Company believes that
dividing the new sales and add-on sales functions has enabled it more
effectively to generate revenue from both target market segments. New account
sales tend to be more complex and have a longer sales cycle, averaging six to
twelve months, while add-on sales typically have a shorter sales cycle but may
require more detailed and specific product knowledge.

        The Company uses periodic newsletters and press releases, participation
in trade shows, direct mail and telemarketing to generate and pursue leads.
Company employees also speak at health care industry conferences and publish
case studies and articles. The Company sponsors annual user group conferences at
which customers can learn about the Company's new product offerings and exchange
information about their own experiences with TSI's products. The Company's May
1997 user group conference attracted approximately 1,300 attendees.




                                       10
<PAGE>   11
BACKLOG

        At September 30, 1996 and 1997, the Company's backlog was $16.4 million
and $17.5 million, respectively. The Company includes in backlog all
unrecognized revenue attributable to signed contracts for software sales and
implementation and deferred revenue associated with maintenance contracts. The
Company had $6.0 million and $7.1 million of deferred revenue associated with
maintenance contracts at September 30, 1996 and 1997, respectively. Of its
backlog of $17.5 million at September 30, 1997, the Company estimates that
approximately 90% will be recognized as revenue during the twelve-month period
following such date. There can be no assurance, however, that orders included in
backlog will generate revenues in the amount estimated or that such revenues
will be recognized during the specified twelve-month period.

COMPETITION

        The market for health care information systems and services is intensely
competitive and rapidly evolving. The Company competes directly with other
vendors of decision support systems to health care providers. Other vendors of
health care information systems, including vendors currently targeting decision
support systems for payors, may enter the markets in which the Company competes.
The Company also faces competition from internal management information systems
departments of large hospital networks, many of which have developed or may
develop financial and clinical outcomes management systems or other cost control
solutions. The Company believes that the principal competitive factors
influencing the market for its products include vendor and product reputation,
product architecture, functionality and features, ease of use, rapidity of
implementation, quality of customer support, product performance and price.
Competition may result in significant price reductions, decreased gross margins,
loss of market share and lack of acceptance of the Company's products. There can
be no assurance that the Company will be able to compete successfully in the
future or that competition will not have a material adverse effect on the
Company's business, financial condition and results of operations. See "Item 1A.
Risk Factors--Competition."

RESEARCH AND PRODUCT DEVELOPMENT

        The Company's products consist primarily of internally-developed
software. In addition, the Company has incorporated in its products DBMSs,
graphical user interfaces, and other software developed by third-party vendors.
The Company believes that the timely development of new products and
enhancements to existing products is essential to maintaining its competitive
position in the market and positioning itself as an innovator. Since the
Company's inception in 1985, TSI has developed and released functionality
upgrades as well as new products on a yearly basis.

        The Company's current research and development efforts include expanding
the capabilities of Transition IV and expanding the Vital Oncology product to
additional disease specific applications. In addition, enhancements are planned
for the core Transition II and Transition for Quality products. A key strategic
initiative focus on the incorporation of OLAP based analytical reporting
throughout the suite of products.

        The Company's research and development activities are conducted in its
Boston office. As of September 30, 1997, its research and development staff
consisted of 51 employees. The Company's total research and development
expenditures were $3.6 million, $4.0 million and $4.6 million in fiscal 1995,
1996 and 1997, respectively. Capitalized software as a percentage of total
research and development expenditures has declined from 19.7% in 1995 to 17.5%
in 1996 and 15.3% in 1997. In each of fiscal 1995, 1996 and 1997, the Company
capitalized $0.7 million of software development costs while amortization of
capitalized development costs in such years amounted to $0.8 million, $0.8
million and $0.7 million respectively.

INTELLECTUAL PROPERTY

        The Company's ability to compete effectively depends to a significant
extent on its ability to protect its proprietary information. The Company relies
primarily on trade secret laws, confidentiality procedures and licensing
arrangements to protect its intellectual property rights.

        The Company generally enters into confidentiality agreements with its
consultants, key employees and sales representatives and generally controls
access to and distribution of its software and other proprietary information.
Despite these precautions, it may be possible for a third party to copy or
otherwise obtain and use the Company's products or technology without
authorization or to develop similar technology independently. Although the
Company intends to defend its intellectual property, there can be no 




                                       11
<PAGE>   12


assurance that the steps taken by the Company to protect its proprietary
information will be adequate to prevent misappropriation of its intellectual
property or that the Company's competitors will not independently develop
software that is substantially equivalent or superior to the Company's software.

        The Company is subject to the risk of alleged infringement by it of the
intellectual property rights of others. Although the Company is not currently
aware of any material infringement claims with respect to the Company's current
or future products, there can be no assurance that third parties will not assert
such claims or that any such claims will not require the Company to enter into
license arrangements or result in protracted and costly litigation, regardless
of the merits of such claims. No assurance can be given that any necessary
licenses will be available or that, if available, such licenses can be obtained
on commercially reasonable terms. Furthermore, litigation may be necessary to
enforce the Company's intellectual property rights, to protect the Company's
trade secrets, to determine the validity and scope of the proprietary rights of
others or to defend against claims of infringement. Such litigation could result
in substantial costs and diversion of resources and could have a material
adverse effect on the Company's business, financial condition and results of
operations. See "Item 1A. Risk Factors -- Dependence on Proprietary Technology;
Risk of Infringement."

EMPLOYEES

        As of September 30, 1997, the Company had 192 full-time employees,
including 90 in operations, 51 in research and development, 34 in sales and
marketing and 17 in general administration and finance.

        The Company believes its future success will depend in large part upon
the continued service of its key technical and senior management personnel and
upon the Company's continuing ability to attract and retain highly-qualified
technical and managerial personnel. Competition for highly-qualified personnel
is intense and there can be no assurance that the Company will be able to retain
its key managerial and technical employees or that it will be able to attract
and retain additional highly-qualified technical and managerial personnel in the
future. None of the Company's employees is represented by a labor union. The
Company has not experienced any work stoppage and considers its relationships
with its employees to be good.

ITEM 2.   PROPERTIES

        The Company's principal offices occupy approximately 27,000 square feet
of office space in Boston, Massachusetts under a lease expiring in August 2000.
The Company also leases space for sales offices in Arizona, California, Georgia,
Illinois, Pennsylvania and Texas. The Company believes that its existing
facilities will be adequate to meet its currently anticipated requirements and
that, if additional space is needed, such space will be available on acceptable
terms.

ITEM 3.   LEGAL PROCEEDINGS

        The Company is not a party to any material litigation, and is not aware
of any pending or threatened litigation that would have a material adverse
effect on the Company or its business.

ITEM 4.   SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

        No matters were submitted to a vote of the Company's stockholders during
the fourth quarter of the fiscal year ended September 30, 1997.




                                       12
<PAGE>   13

                                     PART II

ITEM 5.   MARKET FOR REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDER MATTERS

PRICE RANGE OF COMMON STOCK

        Since April 18, 1996, the Company's Common Stock has been publicly
traded on the Nasdaq National Market under the symbol "TSIX." The following
table sets forth, for the quarterly periods indicated, the high and low sale
price per share of Common Stock as reported on the Nasdaq National Market:

<TABLE>
<CAPTION>
                                                           HIGH       LOW
                                                           ----       ---
Fiscal Year ended September 30, 1997:

    <S>                                                   <C>        <C>   
    First Quarter                                         $22.00     $ 8.25

    Second Quarter                                        $16.63     $11.75

    Third Quarter                                         $18.25     $ 9.00

    Fourth Quarter                                        $21.75     $16.88

</TABLE>


HOLDERS OF RECORD

        As of December 16, 1997, there were 36 holders of record of the Common
Stock and one holder of record of the Non-Voting Common Stock. The number of
record holders of the Common Stock is not representative of the number of
beneficial holders because many shares are held by depositories, brokers or
other nominees.

DIVIDENDS

        The Company has never declared or paid any cash dividends on its Common
Stock. The Company's bank line of credit generally prohibits the payment of cash
dividends to stockholders. Also, the Company currently intends to retain its
earnings, if any, to fund its business and therefore does not anticipate paying
cash dividends in the foreseeable future.

RECENT SALES OF UNREGISTERED SECURITIES

        The following information is furnished with regard to all securities
sold by the Company during the fiscal year ended September 30, 1997 which were
not registered under the Securities Act:

        On September 19, 1997, in conjunction with the Company's acquisition of
Vital, the Company issued to the stockholders of Vital an aggregate of 252,003
shares of Common Stock. The issuance was made in reliance on the exemption from
registration set forth in Section 4(2) of the Securities Act of 1933, as
amended, relating to the sales by an issuer not involving a public offering.




                                       13
<PAGE>   14

ITEM 6.   SELECTED FINANCIAL DATA

        The selected consolidated financial data of the Company set forth below
have been derived from the Company's consolidated financial statements for the
periods indicated. This selected consolidated financial data should be read in
conjunction with "Item 7. Management's Discussion and Analysis of Financial
Condition and Results of Operations" and the Company's consolidated financial
statements and the notes thereto included elsewhere in this Form 10-K.

                      SELECTED CONSOLIDATED FINANCIAL DATA
                     (IN THOUSANDS EXCEPT PER SHARE AMOUNTS)

<TABLE>
<CAPTION>
                                                                               FISCAL YEAR ENDED
                                                    -------------------------------------------------------------------------
                                                    SEPTEMBER 30,  September 30,  September 30,  September 24,  September 25,
                                                             1997           1996           1995           1994           1993
                                                    -------------------------------------------------------------------------
<S>                                                 <C>            <C>            <C>            <C>              <C>    
Revenue                                                   $44,565        $34,269        $27,386        $24,497        $16,884
Income before income taxes and extraordinary items         12,948         10,611          9,975          8,521          2,363
Provision for income taxes                                  7,629          4,324          4,349          3,407            945
Net income before extraordinary item                        5,319          6,287          5,626          5,114          1,418
Extraordinary item:                                                                                             
Loss on early extinguishment of debt                            -          2,149              -              -              -
Net income                                                  5,319          4,138          5,626          5,114          1,418
Series A non-voting preferred stock dividends                   -            593              -              -              -
Net income allocable to common stockholders               $ 5,319         $3,545        $ 5,626        $ 5,114        $ 1,418
                                                          -------        -------        -------        -------        -------
Total assets                                              $89,819        $74,284        $27,737        $20,274        $17,040
Working capital                                            63,568         55,672         14,207          8,207          6,082
Long-term debt                                                  -             21              -              -          1,000
Stockholders' equity                                      $73,519        $60,633        $16,192        $10,566        $ 6,923
                                                                                                                
</TABLE>

(1)     The Company has never declared or paid cash dividends on the Common
        Stock.

                                       14
<PAGE>   15

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

        THIS DISCUSSION AND ANALYSIS CONTAINS CERTAIN FORWARD-LOOKING
STATEMENTS. THESE FORWARD-LOOKING STATEMENTS REPRESENT THE COMPANY'S BELIEFS,
EXPECTATIONS AND INTENTIONS CONCERNING FUTURE EVENTS, INCLUDING, WITHOUT
LIMITATION, FINANCIAL MATTERS, PLANS AND OBJECTIVES OF MANAGEMENT FOR FUTURE
OPERATIONS, PRODUCTS AND SERVICES, THE FUTURE ECONOMIC PERFORMANCE OF THE
COMPANY, AND THE ASSUMPTIONS UNDERLYING SUCH BELIEFS, EXPECTATIONS AND
INTENTIONS. SUCH STATEMENTS ARE NOT GUARANTIES OF FUTURE PERFORMANCE, AND
INVOLVE CERTAIN RISKS AND UNCERTAINTIES THAT COULD CAUSE THE COMPANY'S FUTURE
RESULTS TO DIFFER MATERIALLY FROM THOSE EXPRESSED IN ANY FORWARD-LOOKING
STATEMENTS MADE BY OR ON BEHALF OF THE COMPANY. MANY OF SUCH FACTORS ARE BEYOND
THE COMPANY'S ABILITY TO CONTROL OR PREDICT. READERS ARE ACCORDINGLY CAUTIONED
NOT TO PLACE UNDUE RELIANCE ON FORWARD-LOOKING STATEMENTS. THE COMPANY
DISCLAIMS ANY INTENT OR OBLIGATION TO UPDATE PUBLICLY ANY FORWARD-LOOKING
STATEMENTS WHETHER IN RESPONSE TO NEW INFORMATION, FUTURE EVENTS OR OTHERWISE.
THESE FORWARD-LOOKING STATEMENTS ARE FURTHER QUALIFIED BY IMPORTANT FACTORS
THAT COULD CAUSE ACTUAL RESULTS TO DIFFER MATERIALLY FROM THOSE IN THE
FORWARD-LOOKING STATEMENTS, INCLUDING, WITHOUT LIMITATION, THOSE DISCUSSED IN
"ITEM 1A. RISK FACTORS" ON THE COMPANY'S ANNUAL REPORT ON FORM 10-K FILED WITH
THE SECURITIES AND EXCHANGE COMMISSION FOR THE YEAR ENDED SEPTEMBER 30, 1997.

OVERVIEW

        The Company provides management information technology to hospitals,
integrated delivery networks, physician groups and other health care
organizations. The Company's product lines span the health care organization's
information technology needs, providing enterprise-wide financial and clinical
decision support, data integration services, disease management products and
master person identifier solutions as well as a clinical data repository. The
Company was founded in 1985 and has been profitable in each fiscal year since
1987.

        The Company's revenues are derived from sales of software licenses and
related implementation services and of software maintenance. The software and
implementation revenues associated with the licensing and installation of the
Company's products at an individual customer site typically range from $0.1
million to $1.2 million. Software maintenance contracts are sold separately at
the time of the initial software license sale and are generally renewable
annually. Annual software maintenance fees range from 15% to 18% of the initial
software license fee for the product and provide a source of recurring revenue
for the Company.

        Software and implementation revenues are accounted for using the
percentage of completion method, and revenue is recognized as contract
milestones are reached. The implementation process generally takes from three
to twelve months. The length of time required to complete an implementation
depends on many factors outside the control of the Company, including the state
of the customer's existing information systems and the customer's ability to
commit the personnel and other resources necessary to complete elements of the
implementation process for which the customer is responsible. Revenue
attributable to a contract milestone is recognized upon certification by the
customer that the milestone has been met. As a result, the Company may be
unable to predict accurately the amount of revenue it will recognize in any
period in connection with the sale of its products. The payment terms of a
contract may provide that the amount of the contract price that the Company is
entitled to bill upon achievement of a milestone is less than the revenue
recognized by the Company in connection with the achievement of that milestone.
In such cases, the excess of the revenue recognized over the amount billed is
included in accounts receivable as an "unbilled account receivable." Software
maintenance fees, which are generally received annually in advance, are
recorded as deferred revenue on the Company's balance sheet and are recognized
as revenue ratably over the life of the contract. See Notes 2 and 3 of Notes to
Consolidated Financial Statements.

        Cost of software and implementation revenue consists primarily of the
cost of third-party software that is resold by the Company or included in the
Company's products; personnel costs, the cost of related benefits, travel and
living expenses, costs of materials and other costs related to the installation
and implementation of the Company's products; and amortization of capitalized
software development costs. Cost of maintenance revenue consists primarily of
maintenance fees payable by the Company associated with the third-party
software included in the Company's products and personnel costs incurred in
providing maintenance and technical support services to the Company's
customers.

                                      15
<PAGE>   16
        The Company's research and development expenses consist primarily of
personnel-related costs, including employee salaries and benefits and payments
to consultants. The Company capitalizes certain software development costs in
accordance with Statement of Financial Accounting Standards ("SFAS") No. 86,
"Accounting for the Costs of Computer Software to be Sold, Leased or Otherwise
Marketed." Capitalized software costs are amortized over the life of the
product (generally three years) and amounts amortized are included in cost of
software and implementation revenue. Capitalized software as a percentage of
total research and development expense has declined from 19.7% in fiscal 1995
to 17.6% in fiscal 1996 and 15.3% in fiscal 1997. In each of fiscal 1995, 1996
and 1997 the Company capitalized $0.7 million of software development costs,
while amortization of capitalized software development costs in such years
amounted to $0.8 million, $0.8 million and $0.7 million respectively.

        In January 1996, the Company repurchased from New England Medical
Center and the other stockholders of the Company 87.4% of the shares of common
stock then issued and outstanding on a fully diluted basis for an aggregate
purchase price of approximately $111.4 million (the "Recapitalization"). The
principal purpose of this transaction was to provide liquidity for the existing
stockholders of the Company while permitting them to retain an ownership
interest in the Company. The transaction has been accounted for by the Company
as a leveraged recapitalization. To finance the repurchase of these shares, the
Company issued to Warburg, Pincus Ventures, L.P. and NationsBank Investment
Corporation ("NIC") shares of preferred stock for an aggregate of $55.0
million. The Company also issued to NIC Senior Subordinated Notes in the
aggregate principal amount of $10.0 million and a related warrant and made
borrowings of $40.0 million under a term loan and a revolving credit facility.
In April 1996, the Company completed an initial public offering of 6,900,000
shares of its common stock, which generated net proceeds of $114.4 million. The
outstanding balance of these borrowings was repaid in full and all outstanding
Series A non-voting preferred stock was redeemed upon the closing of the
initial public offering.
        
        On July 22, 1996, the Company acquired substantially all of the
outstanding stock and a note held by a selling principal of Enterprising
HealthCare, Inc. ("Enterprising HealthCare"), based in Tucson, Arizona, for a
total purchase price of approximately $1.8 million in cash. Enterprising
HealthCare provides system integration products and services for the health
care market. The acquisition was accounted for under the purchase method with
the results of Enterprising HealthCare included from July 22, 1996. Purchased
technology costs of $1.6 million are being amortized on a straight-line basis
over seven years. Pro forma results of operations have not been presented, as
the effect of this acquisition on the financial statements was not material.

        On January 31, 1997 the Company acquired a 19.5% ownership interest in
HealthVISION, Inc. ("HealthVISION") for $6 million in cash. HealthVISION, is a
provider of electronic medical record software based in Santa Rosa, California.
The Company holds an option to purchase the remaining outstanding shares of
HealthVISION. This option expires on December 31, 1998.

        On September 19, 1997, the Company acquired all outstanding shares of
Vital Software Inc. ("Vital"), a privately held developer of products that
automate the clinical processes unique to medical oncology. The purchase price
was approximately $6.3 million, which was comprised of $2.7 million in cash and
252,003 shares of the Company's common stock with a value of $3.6 million.

        The purchase price was allocated entirely to purchased research and
development. The purchased research and development, which had not reached
technological feasibility and which had no alternative future use, was valued
using a risk adjusted cash flow model, under which expected future cash flows
associated with in-process research and development were discounted considering
risks and uncertainties related to the viability of and potential changes in
future target markets and to the completion of the products that will be
ultimately marketed by the Company. Purchased research and development, which
is not deductible for tax purposes, was charged to operations at the
acquisition date. Vital's operating results have not been included in the
consolidated financial statements from the date of acquisition due to
immateriality.

        The Company changed its fiscal year end from the last Saturday of
September of each year to September 30. The change was effective with the three
months ended June 30, 1996.

                                      16
<PAGE>   17
RESULTS OF OPERATIONS

        The following table sets forth certain revenue and expense data as a
percentage of the Company's total revenues for each period presented:

<TABLE>
<CAPTION>
                                 SEPTEMBER    SEPTEMBER   SEPTEMBER
                                  30, 1997     30, 1996    30, 1995
-------------------------------------------------------------------------------
<S>                              <C>          <C>         <C>  
Revenues:
  Software and implementation         74.1%        72.5%       72.6%
  Maintenance                         25.9         27.5        27.4
                                     -----        -----       -----
    Total revenues                   100.0        100.0       100.0
                                     -----        -----       -----
Cost of revenues:                                            
  Software and implementation         23.2         21.4        22.7
  Maintenance                          6.4          9.2         8.5
Research and development               8.7          9.7        10.5
Sales and marketing                   15.5         13.2        14.8
General and administrative             8.7          6.9         8.6
Compensation charge                      -          8.8           -
                                                             
Acquired in-process research                                 
   and development                    14.1           -            -
                                     -----        -----       -----
      Total operating expenses        76.6         69.2        65.1
                                     -----        -----       -----
Income from operations                23.4         30.8        34.9
Net interest income                    5.6          0.2         1.5
                                     -----        -----       -----
Income before income taxes                                   
   and extraordinary item             29.0         31.0        36.4
Provision for income taxes            17.1         12.6        15.9
                                     -----        -----       -----
Net income before                                            
   extraordinary item                 11.9         18.4        20.5
Extraordinary item:                                          
  Loss on early extinguishment                               
     of debt, net of taxes               -          6.3           -
                                     -----        -----       -----
    Net income                        11.9         12.1        20.5
  Series A non-voting                                        
     preferred stock dividends           -          1.7           -
                                     -----        -----       -----
Net income allocable to                                      
   common stockholders                11.9%        10.4%       20.5%
                                     =====        =====       =====
</TABLE>
FISCAL YEARS ENDED SEPTEMBER 30, 1997 AND SEPTEMBER 30, 1996

        Revenues. The Company's total revenues increased 30.0% to $44.6 million
in 1997, from $34.3 million in 1996. Software and implementation revenues grew
32.8% to $33.0 million in 1997, compared to $24.9 million in 1996. The growth
in software and implementation revenue is primarily due to sales to new TSI
customers, increased consolidation among existing customers which resulted in
the sale of additional site licenses, and the expansion of TSI's product line
which resulted in increased product sales to existing customers. Maintenance
revenue grew 22.7% to $11.5 million in 1997, compared to $9.4 million in 1996,
due to continued growth in the Company's installed base of customers.

        Cost of revenues. Cost of software and implementation revenue increased
40.5% to $10.3 million (or 31.2% of software and implementation revenue) in
1997, from $7.3 million (or 29.5% of software and implementation revenue) in
1996. The dollar increase is primarily due to costs associated with additional
implementation staff and professional consultants as well as increased royalty
costs for third-party software. Cost of maintenance revenue decreased 10.4% to
$2.8 million (or 24.6% of maintenance revenue) in 1997 from $3.2 million (or
33.6% of maintenance revenue) in 1996. The decrease in cost of maintenance
revenue is primarily due to the reduced technical support necessary on mature
products.

        Research and development. Research and development expenses increased
17.0% to $3.9 million in 1997 from $3.3 million in 1996. The increase in
spending is primarily a result of organizational changes which resulted in a
net increase in the number of staff assigned to research and development roles.
Research and development expenses as a percent of total revenue decreased
slightly to 8.7% in 1997, compared to 9.7% in 1996. The decrease is primarily
due to increased productivity from investments in technologies made in prior
years and maturing of the core product lines. The Company expects that research
and development expenses will increase as a percentage of revenue in future
periods as new development projects are undertaken.

        Sales and Marketing. Sales and marketing expenses increased 53.6% to
$6.9 million in 1997, from $4.5 million in 1996. Sales and marketing expenses
as a percent of total revenue also increased to 15.5% in 1997 from 13.2% in
1996. The increase in spending is primarily due to additional staff and
marketing programs as well as increased commission expense directly related to
the growth in revenue.

                                      17
<PAGE>   18
        General and Administrative. General and administrative expenses
increased 64.2% to $3.9 million in 1997, from $2.4 million in 1996. General and
administrative expenses as a percent of total revenue also increased to 8.7% in
1997 from 6.9% in 1996. The increase in spending is primarily due to
professional services and other costs associated with becoming a publicly traded
company as well as additional administrative expenses related to Enterprising
HealthCare, which was acquired in July 1996.

        Acquired In-Process Research and Development. Acquired in-process
research and development expense includes a charge for purchased research and
development of $6.3 million relating to the acquisition of Vital in September
1997.

        Net Interest Income. Net interest income increased to $2.5 million in
1997 from $0.1 million in 1996. The increase in net interest income is primarily
due to the repayment out of the proceeds of the Company's initial public
offering in April 1996 of debt incurred in the January 1996 Recapitalization and
interest earned on cash balances generated from operations and the balance of
the proceeds of the Company's initial public offering.

        Provision for Income Taxes. The Company's effective income tax rate
increased to 58.9% in 1997 from 40.6% in 1996, primarily due to the effect of
the charge for in-process research and development associated with the
acquisition of Vital, which is not deductible for tax purposes. The tax rate for
1997 without the effect of the charge for in-process research and development
was 39.7%.

FISCAL YEARS ENDED SEPTEMBER 30, 1996 AND SEPTEMBER 30, 1995

        Revenues. The Company's total revenues increased 25.1%, from 
$27.4 million in fiscal 1995 to $34.3 million in fiscal 1996. Software and
implementation revenue increased 25.1%, from $19.9 million in fiscal 1995 to
$24.9 million in fiscal 1996. The increase in software and implementation
revenue was due primarily to growth in sales to integrated delivery systems and
increased penetration of the small hospital market through sales of the
Company's AS/400 and UNIX products. Maintenance revenue increased 25.3%, from
$7.5 million in fiscal 1995 to $9.4 million in fiscal 1996, due to continued
growth in the Company's installed base.

        Cost of Revenues. Cost of software and implementation revenue increased
18.1%, from $6.2 million (or 31.3% of software and implementation revenue) in
fiscal 1995 to $7.3 million (or 29.5% of software and implementation revenue) in
fiscal 1996. The increase in cost of software and implementation revenue was
attributable to higher royalty costs associated with third-party software, due
to a greater proportion of revenue generated from the AS/400, UNIX and Clinical
ABCs products, which have a higher content of third-party software, and to
growth in the Company's implementation staff. Cost of maintenance revenue
increased 35.3%, from $2.3 million (or 31.1% of maintenance revenue) in fiscal
1995 to $3.2 million (or 33.6% of maintenance revenue) in fiscal 1996. The
increase was attributable to higher third-party software maintenance costs and
to growth in the Company's support staff.

        Research and Development. Research and development expense increased
15.6%, from $2.9 million (or 10.5% of total revenues) in fiscal 1995 to
$3.3 million (or 9.7% of total revenues) in fiscal 1996. The increase in expense
relates to the Company's continued development of its current products and to
the development of new products.

        Sales and Marketing. Sales and marketing expense increased 10.9%, from
$4.1 million (or 14.8% of total revenues) in fiscal 1995 to $4.5 million (or
13.2% of total revenues) in fiscal 1996. The increase was primarily related to
the increased costs associated with larger sales and sales support staffs and
commission expenses resulting from higher sales levels.

        General and Administrative. General and administrative expenses remained
relatively unchanged at $2.4 million in each of fiscal 1995 and fiscal 1996
(8.6% and 6.9% of total revenues in such years, respectively). As a percentage
of revenue, general and administrative expenses declined in 1996 due to reduced
accruals for bonuses and continued control over spending.

        Other Operating Expenses. Other operating expenses in fiscal 1996
included a compensation charge of $3.0 million arising from the acquisition by
the Company, in connection with the January 1996 Recapitalization, of shares of
common stock issued to certain executive officers pursuant to the exercise of
options.

        Net Interest Income. Net interest income decreased from $0.4 million in
fiscal 1995 to $0.1 million in fiscal 1996. The decrease in net interest income
was due to the increase in interest expense attributable to the indebtedness
incurred in the Recapitalization, prior to its repayment in April 1996, which
offset the interest income earned on the net proceeds generated by the Company's
initial public offering.

        Provision for Income Taxes. The Company's effective income tax rate
decreased from 43.6% in fiscal 1995 to 40.6% in fiscal 1996 due to certain
provisions taken in the prior year.

        Extraordinary Item. During fiscal 1996 the Company incurred an
extraordinary loss of $2.1 million representing the after-tax effect of the
write-off of $3.6 million of unamortized capitalized financing costs
attributable to indebtedness

                                      18
<PAGE>   19
incurred in the Recapitalization that was repaid out of the proceeds of the
Company's initial public offering.

        Preferred Stock Dividend. The holders of the Series A preferred stock
issued in connection with the Recapitalization were entitled to receive, when
and as declared by the Board of Directors, out of funds legally available
therefore, preferential cumulative dividends at the rate of 12% per annum. The
Company was not obligated to pay dividends prior to the redemption of the Series
A preferred stock, and no dividends were declared by the Board. The Series A
preferred stock was subject to mandatory redemption, provided funds were legally
available therefore, upon the closing of an initial public offering, or the sale
of the Company, but in no event later than January 2006. Upon the closing of the
Company's initial public offering, at which time funds became legally available
for the redemption of the Series A preferred stock and payment of dividends, the
Company redeemed in full the Series A preferred stock and accrued and paid
dividends thereon from the date of the Recapitalization.

LIQUIDITY AND CAPITAL RESOURCES

        At September 30, 1997, the Company had cash and cash equivalents of
$58.5 million, an increase of $7.0 million from the amount at September 30,
1996. The Company's working capital at September 30, 1997 was $63.6 million, an
increase of $7.9 million from the amount at September 30, 1996. The increase in
working capital is primarily attributable to the increase in cash of $7.0
million.

        The increase in cash and cash equivalents was comprised primarily of net
cash provided by operating activities of $16.2 million offset by net cash used
by investing activities of $10.5 million. Net cash provided by operating
activities in fiscal 1997 was generated primarily from net income before the
charge for in-process research and development of $6.3 million associated with
the acquisition of Vital. The net cash used by investing activities was
attributable primarily to two transactions made by the Company during 1997. On
January 31, 1997, the Company acquired a 19.5% equity interest in HealthVISION
for $6.0 million in cash. On September 19, 1997, the Company acquired all
outstanding shares of Vital. The purchase price was approximately $6.3 million,
which was comprised of $2.7 million in cash and 252,003 shares of the Company's
common stock with a value of $3.6 million.

        The Company has an unsecured revolving line of credit in the amount of
$15 million. The credit facility contains covenants setting minimum net worth,
maximum leverage ratio and minimum net income requirements for the Company.
There have been no amounts drawn on this line. Advances under the revolving line
of credit bear interest, at the Company's election, either at a "base rate" or
at a "eurodollar rate." The base rate is a floating rate equal to the greater of
(a) the prime rate or (b) the federal funds effective rate plus one-half of one
percent (.50%). The eurodollar rate is equal to the sum of (x) a rate determined
by reference to the then-current interbank offered rate for dollar-denominated
eurodollar deposits, with certain adjustments, plus (y) one percent (1.0%).

        The Company believes available funds, cash generated from operations and
its unused line of credit of $15 million will be sufficient to finance the
Company's operations and planned capital expenditures for at least the next
twelve months. There can be no assurance, however, that the Company will not
require additional financing during that time or thereafter.

        Recent Accounting Pronouncements. In 1997, the Financial Accounting
Standards Board ("FASB") released the Statement of Financial Accounting
Standards No. 128 ("SFAS 128"), "Earnings Per Share." SFAS 128 simplifies the
standards for computing earnings per share ("EPS") and makes them comparable to
international EPS standards. It replaces the presentation of primary EPS with a
presentation of basic EPS. It also requires dual presentation of basic and
diluted EPS on the face of the income statement for all entities with complex
capital structures and requires a reconciliation of the numerator and
denominator of the basic EPS computation to the numerator and denominator of the
diluted EPS computation. SFAS 128 is effective for financial statements issued
for periods ending after December 15, 1997, including interim periods. SFAS 128
requires restatement of all prior-period EPS data presented. Management has not
yet determined the impact of SFAS 128 on the Company's statements.

        In October 1997, the Accounting Standards Executive Committee of the
American Institute of Certified Public Accountants issued Statement of Position
("SOP") 97-2, "Software Revenue Recognition" which supersedes SOP 91-1,
"Software Revenue Recognition." This SOP provides guidance on applying generally
accepted accounting principles in recognizing revenue on software transactions.
This SOP is effective for transactions entered into in fiscal years beginning
after December 15, 1997. The Company does not believe this statement will have a
material effect on the Company's financial position or results of operations.

                                      19
<PAGE>   20
ITEM 8.   FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

CONSOLIDATED FINANCIAL STATEMENTS

        The Company's Consolidated Financial Statements and Notes thereto as of
September 30, 1997 and 1996 and for each of the three years in the period ended
September 30, 1997 are listed in the Index to Financial Statements in Items
14(a)(1) and 14(a)(2) of this Form 10-K and appear at pages F-1 to F-14.


QUARTERLY RESULTS

        The following table presents selected quarterly statement of operations
data for each of the eight quarters in the period ended September 30, 1997. This
data is unaudited but, in the opinion of the Company's management, reflect all
adjustments that the Company considers necessary for a fair presentation of
these data in accordance with generally accepted accounting principles. The
quarterly results presented below are not necessarily indicative of future
results of operations.

                        SELECTED QUARTERLY FINANCIAL DATA
                    (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
                                   (UNAUDITED)
<TABLE>
<CAPTION>
                                                                                                                
                                                                                        THREE MONTHS ENDED      
                                                                    ---------------------------------------------------------
                                                                    December 31,      March 31,       June 30,  September 30,
STATEMENT OF OPERATIONS DATA                                                1996           1997           1997           1997
                                                                    ---------------------------------------------------------
<S>                                                                 <C>               <C>             <C>        <C>    
Revenue                                                                   $8,486         $9,819        $12,570        $13,690
Income before income taxes                                                 2,965          3,645          5,936            402
Provision for income taxes                                                 1,186          1,458          2,374          2,611
Net income (loss)                                                          1,779          2,187          3,562         (2,209)
Net income (loss) per share                                               $ 0.09         $ 0.11         $ 0.17       $  (0.12)
</TABLE>


<TABLE>
<CAPTION>
                                                                                        THREE MONTHS ENDED
                                                                    --------------------------------------------------------
                                                                    December 30,     March 31,       June 30,  September 30,
STATEMENT OF OPERATIONS DATA                                                1995          1996           1996           1996
                                                                    --------------------------------------------------------
<S>                                                                 <C>              <C>             <C>       <C>    
Revenue                                                                  $ 6,558       $ 7,518        $10,102        $10,091
Income (loss) before income taxes and extraordinary items                  1,999        (1,542)         4,864          5,290
Provision (benefit) for income taxes                                         820          (632)         1,994          2,142
Net income (loss) before extraordinary item                                1,179          (910)         2,870          3,148
Extraordinary item:                                                                                            
Loss on early extinguishment of debt                                           -             -          2,149              -
Net income                                                                 1,179          (910)           721          3,148
Series A non-voting preferred stock dividends                                  -             -            593              -
Net income (loss) allocable to common stockholders                         1,179          (910)           128          3,148
Net income (loss) per share                                               $ 0.08       $ (0.07)        $ 0.01         $ 0.15
</TABLE>

ITEM 9.  CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND 
         FINANCIAL DISCLOSURE

        Not applicable.



                                      20
<PAGE>   21

                                    PART III

ITEM 10.   DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

        The information set forth under the captions "Directors and Executive
Officers" and "Section 16(a) Beneficial Ownership Reporting Compliance" in the
Company's definitive Proxy Statement for the Annual Meeting of Stockholders to
be held on February 10, 1998, which will be filed with the Securities and
Exchange Commission not later than 120 days after the end of the Company's
fiscal year ended September 30, 1997 (the "Definitive Proxy Statement"), is
incorporated herein by reference.

ITEM 11.   EXECUTIVE COMPENSATION

        The information set forth under the caption "Remuneration of Directors
and Executive Officers" in the Company's Definitive Proxy Statement is
incorporated herein by reference.

ITEM 12.   SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

        The information set forth under the caption "Security Ownership of
Certain Beneficial Owners and Management" in the Company's Definitive Proxy
Statement is incorporated herein by reference.

ITEM 13.   CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

        The information set forth under the caption "Certain Transactions" in
the Company's Definitive Proxy Statement is incorporated herein by reference.




                                       21
<PAGE>   22
                                     PART IV

ITEM 14.   EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS ON FORM 8-K

(a)     The following documents are filed as a part of this Report:

        (1)     Consolidated Financial Statements                           Page

         Report of Independent Accountants.................................  F-1
         Consolidated Balance Sheets as of September 30, 1997 and 1996.....  F-2
         Consolidated Statements of Operations for the years ended 
           September 30, 1997, 1996 and 1995 ..............................  F-3
         Consolidated Statements of Cash Flows for the years ended 
           September 30, 1997, 1996 and 1995 ..............................  F-4
         Consolidated Statements of Stockholders' Equity for the 
           years ended September 30, 1997, 1996 and 1995 ..................  F-5
         Notes to Consolidated Financial Statements........................  F-7

        (2)     Financial Statement Schedules

        Financial statement schedules are omitted because they are not
applicable or the required information is shown in the Consolidated Financial
Statements and Notes thereto.

        (3)     Exhibits

        The documents listed below, except for documents identified by
asterisks, are being filed as exhibits herewith. Documents identified by
asterisks are not being filed herewith and, pursuant to Rule 12b-32 of the
General Rules and Regulations promulgated by the Commission under the Exchange
Act, reference is made to such documents as previously filed as exhibits with
the Commission. The Company's file number under the Exchange Act is 0-28182.

        *3.2    Form of Amended and Restated Articles of Organization

        *3.4    Amended and Restated By-Laws

        *3.5    Articles of Amendment to the Articles of Organization, as filed
                with the Secretary of State of the Commonwealth of Massachusetts
                on April 3, 1996

        *4.1    Specimen certificate for Common Stock

      *+10.1    Transition Systems, Inc. 1995 Incentive and Non-Statutory Stock
                Option Plan

      *+10.2    1996 Employee Stock Purchase Plan

       *10.3    Recapitalization Agreement, dated as December 8, 1995, among the
                Company, Warburg, Pincus Ventures, L.P. and the Stockholders of
                the Company

       *10.4    Amendment No. 1 to the Recapitalization Agreement dated as of
                December 8, 1995, among the Company, Warburg, Pincus Ventures,
                L.P. and the Stockholders of the Company, dated as of January
                23, 1996, among the Company, Warburg, Pincus Ventures, L.P. and
                the Stockholders of the Company

       *10.5    Joinder Agreement, dated as of January 24, 1996, among the
                Company, Warburg, Pincus Ventures, L.P., New England Medical
                Center, Inc. and NationsBank Investment Corporation

       *10.6    Registration Rights Agreement, dated as of January 24, 1996,
                between the Company and certain Investors

      *+10.7    Employment Agreement, dated as of January 24, 1996, between the
                Company and Donald C. Cook

      *+10.8    Employment Agreement, dated as of January 24, 1996, between the
                Company and Christine Shapleigh, M.D.

      *+10.9    Employment Agreement, dated as January 24, 1996, between the
                Company and Robert F. Raco

     *+10.10    Non-Competition Agreement, dated as of January 24, 1996,
                between the Company and Jerome H. Grossman, M.D.

      *10.11    Credit Agreement, dated January 24, 1996, among the Company,
                NationsBank, N.A., as Agent and as Lender, and certain Lenders
                party thereto from time to time

      *10.13    Promissory Note (Revolving Loan) of Transition Systems, Inc.,
                dated January 24, 1996, in favor of NationsBank, N.A. in the
                principal amount of $6 million

      *10.15    Promissory Note (Revolving Loan) of Transition Systems, Inc.,
                dated January 24, 1996, in favor of the First National Bank of
                Boston in the principal amount of $4.5 million

      *10.17    Promissory Note (Revolving Loan) of Transition Systems, Inc.,
                dated January 24, 1996, in favor of Fleet Bank of Massachusetts,
                N.A. in the principal amount of $4.5 million

      *10.18    Subordinated Note and Warrant Purchase Agreement, dated as of
                January 24, 1996, between the Company and 

                                       22
<PAGE>   23
                NationsBank Investment Corporation 

      *10.20    Non-Voting Common Stock Purchase Warrant, dated January 24,
                1996, granted by the Company to NationsBank Investment
                Corporation

      *10.21    Software License Agreement, dated as December 3, 1985, between
                the Company and New England Medical Center Hospitals, Inc.

      *10.23    OEM Software License Agreement, dated as of June 30, 1986,
                between the Company and Praxis International, Inc. (formerly
                Computer Corporation of America), as amended (confidential
                treatment granted for certain portions pursuant to Rule 406)

      *10.24    Letter Agreement, dated October 20, 1995, between the Company
                and HCIA Inc.

      *10.25    Sublease, dated as of March 17, 1992, between the Company and
                Ernst & Young, for office space in One Boston Place, Boston,
                Massachusetts

      *10.26    Transition Systems, Inc. Amended and Restated 1995 Incentive and
                Non-Statutory Stock Option Plan

      *10.27    First Amendment, dated April 1, 1996, to Non-Voting Common Stock
                Purchase Warrant granted by the Company to NationsBank
                Investment Corporation

      *10.28    Addendum to License Agreement between Computer Corporation of
                America and the Company (confidential treatment granted for
                certain portions pursuant to Rule 406)

      **10.1    Credit Agreement dated April 26, 1996 between the Company and
                NationsBank, N.A. as Agent and the Lenders party thereto
                (Exhibits B through I and all Schedules omitted)

   ***+10.29    Employment Agreement, dated as of July 19, 1996, among the
                Company, Enterprising HealthCare, Inc. and Anthony R. Fonze

        11.1    Computation of Earnings Per Share 

        21.1    List of Subsidiaries of the Company

        23.1    Consent of Coopers & Lybrand L.L.P.

        24.1    Power of Attorney (included on the signature page to this Form
                10-K)

        27.1    Financial Data Schedule for September 30, 1997 and year then
                ended

*       Incorporated by reference to the similarly numbered exhibit filed with
        the Company's Registration Statement on Form S-1, File No. 333-01758.

**      Incorporated by reference to the similarly numbered exhibit filed with
        the Company's Quarterly Report on Form 10-Q for the quarter ended March
        30, 1996.

***     Incorporated by reference to the similarly numbered exhibit filed with
        the Company's Annual Report on Form 10-K for the year ended September
        30, 1996.

+       Management contract or compensatory plan, contract or arrangement in
        which a director or Named Executive Officer participates.

        The Company will furnish a copy of any of the foregoing exhibits to any
stockholder who so requests in writing at the rate of $0.35 per page, plus
shipping and handling, upon payment of such fee by bank check or money order
payable to the Company. Please submit any such written request to Ms. Paula
Malzone, CFO and Treasurer, Transition Systems, Inc., One Boston Place, Boston,
Massachusetts 02108.

(b)     Reports on Form 8-K

        No Reports on Form 8-K were filed by the Company during the fourth
quarter of the fiscal year ended September 30, 1997.




                                       23
<PAGE>   24
TO THE BOARD OF DIRECTORS AND STOCKHOLDERS OF TRANSITION SYSTEMS, INC.:


We have audited the accompanying consolidated balance sheets of Transition
Systems, Inc. as of September 30, 1997 and 1996 and the related consolidated
statements of operations, cash flows, and stockholders' equity for each of the
three years in the period ended September 30, 1997. These financial statements
are the responsibility of the Company's management. Our responsibility is to
express an opinion on these 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 financial statements referred to above present fairly, in
all material respects, the consolidated financial position of Transition
Systems, Inc. as of September 30, 1997 and 1996, and the consolidated results of
its operations and its cash flows for each of the three years in the period
ended September 30, 1997, in conformity with generally accepted accounting
principles.



Boston, Massachusetts
November 17, 1997

                                     F-1
<PAGE>   25
CONSOLIDATED BALANCE SHEETS

<TABLE>
<CAPTION>
                                                                                                       FISCAL YEAR ENDED
                                                                                                -----------------------------------
                                                                                                SEPTEMBER 30,    SEPTEMBER 30,
                                                                                                         1997             1996
-----------------------------------------------------------------------------------------------------------------------------------
ASSETS

<S>                                                                                             <C>              <C>        
CURRENT ASSETS:
   Cash and cash equivalents                                                                      $58,484,640      $51,505,079
   Accounts receivable, net (Note 3)                                                               19,339,546       13,418,624
   Other current assets                                                                               696,292        1,831,074
   Deferred income taxes (Note 12)                                                                    852,973        2,062,000
                                                                                                   ----------       ----------
      Total current assets                                                                         79,373,451       68,816,777
                                                                                                   ----------       ----------
Property and equipment, net (Note 4)                                                                1,356,805        1,108,120
Capitalized software costs, net                                                                     1,410,697        1,399,006
Purchased technology (Note 15)                                                                      1,375,817        1,611,438
Intangible assets, net                                                                                302,641          120,240
Long-term deferred income taxes (Note 12)                                                                   -        1,228,000
Investment (Note 5)                                                                                 6,000,000                -
                                                                                                   ----------       ----------
      Total assets                                                                                $89,819,411      $74,283,581
                                                                                                   ==========       ==========

LIABILITIES AND STOCKHOLDERS' EQUITY

CURRENT LIABILITIES:
   Accounts payable                                                                                   279,687          595,112
   Accrued expenses                                                                                 6,680,269        4,279,934
   Income taxes payable                                                                             1,476,251        2,014,825
   Deferred revenue                                                                                 7,368,824        6,254,748
                                                                                                   ----------       ----------
      Total current liabilities                                                                    15,805,031       13,144,619
                                                                                                   ----------       ----------
Notes payable                                                                                               -           21,344
Deferred income taxes (Note 12)                                                                       495,845          485,000
                                                                                                   ----------       ----------
      Total liabilities                                                                            16,300,876       13,650,963
                                                                                                   ----------       ----------
Commitments (Notes 6 and 14)

STOCKHOLDERS' EQUITY (NOTES 2 AND 8):
   Common stock, $.01 par value; 30,000,000 shares authorized at September 30,
      1997 and 1996; 17,713,683 shares issued and outstanding at September 30, 1997, 
      16,645,097 shares issued and outstanding at September 30, 1996                                  177,137          166,451
   Non-voting common stock, $.01 par value; 1,000,000 shares authorized at
      September 30, 1997 and 1996; 356,262 shares issued and outstanding at
      September 30, 1997 and 1996                                                                       3,563            3,563
   Non-voting common stock warrant                                                                    394,539          394,539
   Additional paid-in capital                                                                      46,716,986       39,160,834
   Retained earnings                                                                               26,226,310       20,907,231
                                                                                                   ----------       ----------
      Total stockholders' equity                                                                   73,518,535       60,632,618
                                                                                                   ----------       ----------
         Total liabilities and stockholders' equity                                               $89,819,411      $74,283,581
                                                                                                   ==========       ==========
</TABLE>




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


                                     F-2
<PAGE>   26
CONSOLIDATED STATEMENTS OF OPERATIONS
<TABLE>
<CAPTION>
                                                                                              FISCAL YEAR ENDED
                                                                              ------------------------------------------------      
                                                                              SEPTEMBER 30,     SEPTEMBER 30,    SEPTEMBER 30,
                                                                                       1997              1996             1995
------------------------------------------------------------------------------------------------------------------------------
<S>                                                                           <C>               <C>              <C>        
REVENUES:
   Software and implementation                                                  $33,017,206       $24,860,650      $19,877,780
   Maintenance                                                                   11,547,873         9,408,644        7,508,330
                                                                                 ----------        ----------       ----------
      Total revenues                                                             44,565,079        34,269,294       27,386,110
                                                                                 ----------        ----------       ----------

COST OF REVENUES:
   Software and implementation                                                   10,312,564         7,341,239        6,213,638
   Maintenance                                                                    2,835,327         3,164,514        2,338,701
Research and development                                                          3,872,285         3,309,895        2,862,883
Sales and marketing                                                               6,921,500         4,505,693        4,064,207
General and administrative                                                        3,883,948         2,365,579        2,360,252
Compensation charge                                                                       -         3,023,964                -
Acquired in-process research and development (Note 15)                            6,292,529                 -                -
                                                                                 ----------        ----------       ----------
      Total operating expenses                                                   34,118,153        23,710,884       17,839,681
                                                                                 ----------        ----------       ----------
Income from operations                                                           10,446,926        10,558,410        9,546,429

Interest income                                                                   2,501,468         1,294,077          428,985
Interest expense                                                                          -        (1,240,935)               -
                                                                                 ----------        ----------       ----------
Income before income taxes and extraordinary items                               12,948,394        10,611,552        9,975,414
Provision for income taxes                                                        7,629,315         4,324,296        4,349,181
                                                                                 ----------        ----------       ----------
Net income before extraordinary item                                              5,319,079         6,287,256        5,626,233

Extraordinary item:
   Loss on early extinguishment of debt (net of taxes of $1,492,000)                      -         2,148,697                -
                                                                                 ----------        ----------       ----------
      Net income                                                                $ 5,319,079       $ 4,138,559      $ 5,626,233
                                                                                 ==========        ==========       ==========
Series A non-voting preferred stock dividends                                             -           593,476                -
Net income allocable to common stockholders                                     $ 5,319,079       $ 3,545,083      $ 5,626,233
                                                                                 ==========        ==========       ==========

INCOME PER SHARE (NOTE 2):
   Net income before extraordinary item                                              $ 0.26            $ 0.37           $ 0.41
   Extraordinary item                                                                     -             (0.13)               -
                                                                                 ----------        ----------       ----------
   Net income                                                                          0.26              0.24             0.41
   Net income allocable to common stockholders                                       $ 0.26       $      0.21      $      0.41
   Weighted average common shares outstanding                                    20,557,983        16,971,721       13,886,129
                                                                                 ==========        ==========       ==========
</TABLE>

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



                                     F-3
<PAGE>   27
CONSOLIDATED STATEMENTS OF CASH FLOWS

<TABLE>
<CAPTION>
                                                                                                      FISCAL YEAR ENDED 
                                                                                 ------------------------------------------------
                                                                                 SEPTEMBER 30,     SEPTEMBER 30,    SEPTEMBER 30,
                                                                                         1997              1996             1995
---------------------------------------------------------------------------------------------------------------------------------
<S>                                                                              <C>               <C>              <C>
CASH FLOWS FROM OPERATING ACTIVITIES:                                                                                              
  Net income                                                                      $ 5,319,079       $ 4,138,559      $ 5,626,233
  Adjustments to reconcile net income to net cash provided by 
    operating activities:
    Extraordinary item, gross                                                               -         3,641,858                -
    Write-off of in-process research and development                                6,292,529                 -                -
    Deferred income taxes                                                           2,447,872        (1,639,794)        (759,467)
    Depreciation and amortization                                                   1,632,036         1,442,799        1,378,970
    Compensation charge in connection with the recapitalization                             -         3,023,964                -
    Compensation charge related to options granted                                    (91,415)           91,415                -
  Tax benefit from stock option exercises                                           2,770,129                 -                - 
  Changes in operating assets and liabilities net of effects from 
    purchase of businesses:
    Accounts receivable                                                            (5,920,922)       (1,788,625)      (3,010,165)
    Other current assets                                                            1,134,782          (962,928)        (195,227)
    Accounts payable                                                                 (315,425)          (97,982)         (77,789)
    Accrued expenses                                                                2,387,823           242,531          611,841
    Due to affiliates                                                                       -            (9,335)        (484,619)
    Deferred revenue                                                                1,114,076         1,219,972          978,041
    Taxes payable                                                                    (538,574)          730,825          920,000 
                                                                                  -----------        ----------      -----------   
      Net cash provided by operating activities                                    16,231,990        10,033,259        4,987,818
                                                                                  -----------        ----------      -----------
CASH FLOWS PROVIDED BY (USED BY) INVESTING ACTIVITIES:
  Purchase of investments                                                            (250,000)       (1,595,359)      (6,997,879) 
  Maturities of investments                                                           250,000         3,163,875        1,458,182 
  Sales of investments                                                                      -         5,755,112                - 
  Purchase of property and equipment                                                 (910,684)         (571,633)        (515,044)
  Additions to capitalized software costs                                            (711,663)         (703,746)        (699,996)
  Additions to intangible assets                                                     (217,030)         (124,626)          (5,550)
  Investment                                                                       (6,000,000)                -                - 
  Acquisition of businesses, net of cash acquired                                  (2,667,530)       (1,727,729)               - 
                                                                                 ------------        ----------      -----------
      Net cash (used by) provided by investing activities                        (10,506,907)        4,195,894       (6,760,287)
                                                                                 ------------        ----------      -----------
                                                                                    
CASH FLOWS PROVIDED BY (USED BY) FINANCING ACTIVITIES:
  Proceeds from initial public offering                                                     -       114,428,895                - 
  Issuance of Series A preferred stock                                                      -        20,000,000                - 
  Redemption of Series A preferred stock                                                    -       (20,000,000)               - 
  Payments of Series A preferred stock dividends                                            -          (593,476)               - 
  Proceeds from issuance of debt                                                            -        49,605,461                - 
  Early extinguishment of debt                                                              -       (50,000,000)               -
  Proceeds from issuance of Series B preferred stock                                        -        33,612,000                -
  Proceeds from issuance of Series C preferred stock                                        -         1,388,000                -
  Payment of fees related to recapitalization                                               -        (3,360,127)               -
  Purchase of common stock                                                                  -      (111,410,217)               -
  Exercise of options                                                               1,236,634           783,100                -
  Payments on note payable                                                             (8,646)                -                - 
  Proceeds from stock purchase plan                                                    32,080                 -                -
  Proceeds from warrants issued                                                             -           394,539                -
  Equity issuance costs                                                                (5,590)       (1,415,960)               - 
                                                                                 ------------        ----------      -----------
      Net cash provided by financing activities                                     1,254,478        33,432,215                -
                                                                                 ------------        ----------      -----------
Net increase (decrease) in cash and cash equivalents                                6,979,561        47,661,368       (1,772,469)
Cash and cash equivalents - beginning of year                                      51,505,079         3,843,711        5,616,180
                                                                                 ------------        ----------      -----------
Cash and cash equivalents - end of year                                           $58,484,640       $51,505,079      $ 3,843,711
                                                                                 ============       ==========       ===========

SUPPLEMENTAL INFORMATION:  
  Income taxes paid                                                               $ 2,507,680       $ 3,063,153      $ 3,896,246 
  Interest paid                                                                             -       $ 1,119,444                -
                                                                                    
</TABLE>


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

                                     F-4
<PAGE>   28
CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY

<TABLE>
<CAPTION>
                                                                Non-voting                                                     
                                    Common Stock               Common Stock       Non-voting         Treasury Stock
                              -----------------------      -----------------     Common Stock -----------------------------
                               Shares          Amount      Shares     Amount       Warrant       Shares           Amount 
---------------------------------------------------------------------------------------------------------------------------
<S>                           <C>             <C>          <C>        <C>       <C>            <C>            <C>
Balance at
  September 24, 1994           30,060,000    $300,600                                          (1,670,000)    $  (1,470,950)
Net income                                                                                                                
                              -----------    --------                                         -----------     ------------- 
Balance at
  September 30, 1995           30,060,000     300,600                                          (1,670,000)       (1,470,950)
                              -----------    --------                                         -----------     ------------- 

Stock options exercised         1,320,191      13,202                                                                    
Repurchase of common
  stock in connection
  with the recapitalization                                                                   (28,592,404)    $(108,386,253)
Retirement of
  treasury shares             (30,262,404)   (302,624)                                         30,262,404       109,857,203 
Issuance of common
  stock warrant                                                                   $394,539                                
Issuance of common
  stock in initial
  public offering               6,900,000      69,000                                                                    
Equity issuance costs                                                                                                     
Issuance of common
  stock with conversion
  of Series B convertible
  preferred stock               8,627,310      86,273                                                                    
Issuance of non-voting
  common stock with
  conversion of Series
  C convertible
  preferred stock                                          356,262    $3,563                                              
Compensation expense                                                                                                      
Dividends on Series A
  non-voting preferred
  stock                                                                                                                   
Net income                                                                                                                
                              -----------    --------      -------    ------      --------    -----------     ------------- 
Balance at
  September 30, 1996           16,645,097     166,451      356,262     3,563       394,539              -                 - 
                              -----------    --------      -------    ------      --------    -----------     ------------- 

Stock options exercised           813,371       8,134                                                                    
Issuance of common
  stock related to
  acquisition of
  Vital Software                  252,003       2,520                                                                    
Issuance of common
  stock in connection
  with employee stock
  purchase plan                     3,212          32                                                                    
Equity issuance costs                                                                                                     
Cancellation of
  compensatory
  stock option grants                                                                                                     
Income tax benefit
  from stock options
  exercised                                                                                                               
Net income                                                                                                                
                              -----------    --------      -------    ------      --------    -----------   ------------- 
Balance at
  September 30, 1997           17,713,683    $177,137      356,262    $3,563      $394,539              -              - 
                              ===========    ========      =======    ======      ========    ===========   ============= 
</TABLE>

                                     F-5
<PAGE>   29
<TABLE>
<CAPTION>
                                 Additional                        Total                                               
                                  Paid-in         Retained      Stockholders'                                           
                                  Capital         Earnings         Equity                                             
--------------------------------------------------------------------------------
<S>                            <C>              <C>             <C>                                         
Balance at                                                                                                 
  September 24, 1994                            $11,735,915     $ 10,565,565                                              
Net income                                        5,626,233        5,626,233                                               
                                                -----------     ------------                                             
Balance at                                                                                                 
  September 30, 1995                             17,362,148       16,191,798                                             
                                                -----------     ------------                                             
                                                                                                           
Stock options exercised        $    769,898                          783,100                                         
Repurchase of common                                                                                       
  stock in connection                                                                                      
  with the recapitalization                                     (108,386,253)                                             
Retirement of                                                                                              
  treasury shares              (109,554,579)                               -                                   
Issuance of common                                                                                         
  stock warrant                                                      394,539                                                      
Issuance of common                                                                                         
  stock in initial                                                                                         
  public offering               114,359,895                      114,428,895                                      
Equity issuance costs            (1,415,959)                      (1,415,959)                                        
Issuance of common                                                                                         
  stock with conversion                                                                                    
  of Series B convertible                                                                                  
  preferred stock                33,525,727                       33,612,000                                  
Issuance of non-voting                                                                                     
  common stock with                                                                                        
  conversion of Series                                                                                     
  C convertible                                                                                            
  preferred stock                 1,384,437                        1,388,000                          
Compensation expense                 91,415                           91,415               
Dividends on Series A                                                                                      
  non-voting preferred                                                                                     
  stock                                            (593,476)        (593,476)                            
Net income                                        4,138,559        4,138,559                
                               ------------     -----------     ------------                                     
Balance at                                                                                                 
  September 30, 1996             39,160,834      20,907,231       60,632,618                                          
                               ------------     -----------     ------------                                          
                                                                                                           
Stock options exercised           1,228,500                        1,236,634                                          
Issuance of common                                                                                         
  stock related to                                                                                         
  acquisition of                                                                                           
  Vital Software                  3,622,480                        3,625,000                                          
Issuance of common                                                                                         
  stock in connection                                                                                      
  with employee stock                                                                                      
  purchase plan                      32,048                           32,080                                           
Equity issuance costs                (5,590)                          (5,590)                                             
Cancellation of                                                                                            
  compensatory                                                                                             
  stock option grants               (91,415)                         (91,415)                                            
Income tax benefit                                                                                         
  from stock options                                                                                       
  exercised                       2,770,129                        2,770,129                                     
Net income                                        5,319,079        5,319,079                                     
                               ------------     -----------     ------------                    
Balance at                                                                                                 
  September 30, 1997           $ 46,716,986     $26,226,310     $ 73,518,535    
                               ============     ===========     ============                    
</TABLE>


                                     F-6
<PAGE>   30
NOTE 1. NATURE OF THE BUSINESS:

Transition Systems, Inc. (the "Company") is a leading provider of integrated
clinical and financial decision support systems for hospitals, integrated
delivery networks, physician groups and other healthcare organizations. The
Company was founded in 1985 as a for-profit, majority-owned subsidiary of New
England Medical Center, Inc. ("NEMC"). The Company was a majority-owned
subsidiary of NEMC until the January 1996 leveraged recapitalization transaction
(the "Recapitalization") described in Note 8.

NOTE 2. SUMMARY OF ACCOUNTING POLICIES:

    Fiscal Year

The Company changed its fiscal year from the last Saturday of September of each
year to September 30. The change was effective with the three months ended June
30, 1996.

    Principles of Consolidation 

The consolidated financial statements include the accounts of Transition
Systems, Inc. and its wholly-owned subsidiaries. All significant intercompany
transactions have been eliminated.

    Cash Equivalents

For purposes of the consolidated statements of cash flows, the Company considers
all highly liquid debt instruments with a maturity date of three months or less
at the time of purchase to be cash equivalents. Cash equivalents are stated at
cost plus accrued interest which approximates market.

    Investments in Debt and Equity Securities

Management determines the appropriate classification of its investments in debt
and equity securities at the time of purchase and reevaluates such determination
at each balance sheet date. Realized or unrealized gains or losses applicable to
the transfer of securities to the available-for-sale category and subsequent
sale of these investments were immaterial.

    Capitalized Software Costs

Software development costs subsequent to the establishment of technological
feasibility are capitalized. Capitalized internally developed software costs
approximated $700,000 for fiscal years 1997, 1996 and 1995. Amortization of
capitalized software costs, which begins with the general release of a product
to customers, is included in cost of software and implementation revenues and
amounted to approximately $700,000, $767,000 and $767,000 for the fiscal years
ended 1997, 1996 and 1995, respectively. Amortization of capitalized software
costs is provided on a product-by-product basis at the greater of the amount
calculated on a straight-line basis over the estimated economic life of the
products, generally three years, or the ratio that current gross revenues for a
product bear to the total of current and anticipated future gross revenues for
that product. Accumulated amortization of software development costs was
$4,816,000, $4,116,000 and $3,349,000 at the end of fiscal years 1997, 1996 and
1995, respectively.

All other expenditures for research and development are charged to operations
when incurred.

    Purchased Technology Costs      

Purchased technology costs are carried at cost less accumulated amortization
which is calculated on a straight-line basis over an estimated useful life of
seven years. Accumulated amortization on purchased technology costs was $274,890
in 1997 and $0 in 1996.

    Intangible Assets       

Intangible assets include the costs incurred to register trademarks, copyrights
and related legal expenses and debt issuance costs. Amortization is computed
using the straight-line method over estimated useful lives ranging from three to
five years.

    Property and Equipment

Property and equipment are stated at cost. Depreciation is computed using the
straight-line method over the estimated useful lives of the assets as follows:

<TABLE>
<S>                         <C>
Equipment                    3 to 5 years
Furniture and fixtures       3 to 5 years
Leasehold improvements       the lesser of the useful life
                              or remaining lease term
</TABLE>

Maintenance and repair costs are expensed when incurred and betterments are
capitalized. Upon retirement or sale, the cost of the assets disposed and the
related accumulated depreciation are removed from the accounts and any resulting
gain or loss is credited or charged to income.


                                     F-7
<PAGE>   31
    Revenue Recognition

The percentage of completion method is used by the Company primarily in
connection with sales in which the customer is implementing the Company's core
products for the first time. Add-on sales in which an existing customer licenses
new modules or adds additional functionality do not generally involve
substantial implementation effort and are recognized upon contract execution and
shipment of the product. In fiscal 1996, the Company changed its method of
recognizing software license revenue when associated with substantial
implementation effort from percentage of completion based principally on costs
incurred to percentage of completion based principally upon progress and
performance as measured by achievement of contract milestones. The change in
method was made in accordance with Accounting Principles Board Opinion No. 20 in
contemplation of an initial public offering and in recognition of the Company's
increased focus on providing a solution that combines software and
implementation, as well as to facilitate the timely quarterly reporting
requirements as a Securities and Exchange Commission ("SEC") registrant. The
financial statements for all periods presented have been restated to reflect
this change.

The effect of the restatement was a decrease in software and implementation
revenue in fiscal year 1995 of approximately $1,391,000 and a decrease in net
income in fiscal year 1995 of $797,000.

Revenues from maintenance contracts are recognized ratably over the life of the
service contract, generally twelve months. Deferred revenue relates primarily to
these maintenance contracts.

Advertising and Promotion Expense
All advertising and promotion costs are expensed as incurred. All contract
procurement costs are included in sales and marketing expense and are expensed
as incurred.

    Income Taxes

Deferred tax assets and liabilities are recognized based on temporary
differences between the financial statement and tax bases of assets and
liabilities using enacted tax rates in effect for the year in which the
temporary differences are expected to reverse.

    Risks and Uncertainties

The Company sells its products primarily to hospitals and other health care
institutions. The Company performs ongoing credit evaluations of its customers.
The Company maintains reserves for potential credit losses and such losses have
been within management's expectations.

The Company invests its daily excess cash in a money market fund with a major
bank. The Company has not experienced any material losses on its investments.

The preparation of financial statements in conformity with generally accepted
accounting principles requires management to make estimates and assumptions that
affect the reported amounts of assets and liabilities and disclosure of
contingent assets, liabilities and litigation at the date of the financial
statements and the reported amounts of revenues and expenses during the
reporting period. Actual results could differ from those estimates and would
impact future results of operations and cash flows.

    Net Income Per Common Share

Net income per common share is computed based upon the weighted average number
of common shares and common equivalent shares (using the treasury stock method)
outstanding after giving effect to the Company's initial public offering. Common
equivalent shares are included in the per share calculations where the effect of
their inclusion would be dilutive. In accordance with the Securities and
Exchange Commission Staff Accounting Bulletin No. 83 ("SAB 83") all common and
common equivalent shares and other potentially dilutive instruments, including
stock options, warrants and preferred stock issued during the twelve-month
period prior to the initial filing date of the Registration Statement for the
Company's initial public offering, have been included in the calculation as if
they were outstanding for all periods presented.

    Recent Accounting Pronouncements

In 1997, the Financial Accounting Standards Board ("FASB") released the
Statement of Financial Accounting Standards No. 128 ("SFAS 128"), "Earnings Per
Share." SFAS 128 simplifies the standards for computing earnings per share
("EPS") and makes them comparable to international EPS standards. It replaces
the presentation of primary EPS with a presentation of basic EPS. It also
requires dual presentation of basic and diluted EPS on the face of the income
statement for all entities with complex capital structures and requires a
reconciliation of the numerator and denominator of the basic EPS computation to
the numerator and denominator of the diluted EPS computation. SFAS 128 is
effective for financial statements issued for periods ending after December 15,
1997, including interim periods. SFAS 128 requires restatement of all
prior-period EPS data presented. Management has not yet determined the impact of
SFAS 128 on the Company's statements.

                                     F-8
<PAGE>   32
NOTE 3. ACCOUNTS RECEIVABLE:

At September 30, accounts receivable consisted of the following:
<TABLE>
<CAPTION>
                                        1997           1996
-----------------------------------------------------------
<S>                              <C>           <C>
Billed                           $11,973,755    $ 9,360,605
Unbilled                           7,540,791      4,183,019
                                 -----------     ----------
                                  19,514,546     13,543,624
Allowance for doubtful
   accounts                         (175,000)      (125,000)
                                  ----------     ----------
                                 $19,339,546    $13,418,624
                                 ===========     ==========
</TABLE>
Unbilled accounts receivable arise from differences in the timing of revenue
recognition and billing under the contract terms. Provisions and write-offs for
bad debts for fiscal years 1997, 1996 and 1995 were $102,250, $73,000 and
$156,200, respectively.

NOTE 4. PROPERTY AND EQUIPMENT:

Property and equipment at September 30, 1997 and 1996 consisted of the
following:

<TABLE>
<CAPTION>
                                        1997           1996
-----------------------------------------------------------
<S>                               <C>            <C>
Equipment                         $3,536,726     $2,796,786
Furniture and fixtures             1,078,888        933,481
Leasehold improvements               355,540        330,203
                                   ---------      ---------
                                   4,971,154      4,060,470
Accumulated depreciation
   and amortization               (3,614,349)    (2,952,350)
                                   ---------      ---------
                                  $1,356,805     $1,108,120
                                   =========      =========
</TABLE>

Depreciation expense for the fiscal years 1997, 1996 and 1995 was $661,999,
$514,204 and $606,384, respectively.

NOTE 5. INVESTMENT:

On January 31, 1997 the Company acquired a 19.5% ownership interest in
HealthVISION, Inc. for $6 million in cash. HealthVISION is a provider of
electronic medical record software based in Santa Rosa, California. This
investment is being accounted for on the cost basis. The Company holds an option
to purchase the remaining outstanding shares of HealthVISION. This option
expires on December 31, 1998.

NOTE 6. RELATED PARTY AGREEMENTS AND TRANSACTIONS:

The Company had an arrangement to reimburse NEMC for administrative services
provided to the Company by employees of NEMC. Under this arrangement, the
Company incurred expenses of $24,200 in fiscal year 1996, and $96,800 in fiscal
year 1995. This arrangement was terminated as of January 24, 1996. Since that
date, these administrative services have been performed internally by Company
personnel. This change has not resulted in a material increase in the Company's
costs.

The Company obtained certain other services through NEMC, including health
benefits for its employees, for which it incurred a total of $134,114 and
$420,133 in operating expenses in fiscal years 1996 and 1995, respectively. The
Company discontinued this arrangement as of December 31, 1995, and arranged to
provide comparable benefits directly to its employees. This change has not
resulted in a material increase in the Company's cost of providing and
administering these employee benefits.

Additionally, the Company used the computer facilities of New England Medical
Center Hospitals, Inc., an affiliate of NEMC, pursuant to a data processing
agreement. This service was provided at a charge of $82,467 in fiscal year 1996
and $109,956 in fiscal year 1995. This service was discontinued in June 1996.

                                     F-9
<PAGE>   33
NOTE 7. LINE OF CREDIT--BANK:

On April 26, 1996, the Company entered into a $25 million unsecured revolving
line of credit with a bank group led by NationsBank, N.A. as agent and as
lender. The credit facility contains covenants setting minimum net worth,
maximum leverage ratio and minimum net income requirements for the Company. On
September 20, 1996, the Company amended its total revolving credit commitment
from $25 million to $15 million. There have been no amounts drawn on this line.
Advances under the revolving line of credit bear interest, at the Company's
election, either at a "base rate" or at a "eurodollar rate." The base rate is a
floating rate equal to the greater of (a) the prime rate or (b) the federal
funds effective rate plus one-half of one percent (.50%). The eurodollar rate is
equal to the sum of (x) a rate determined by reference to the then-current
interbank offered rate for dollar denominated eurodollar deposits, with certain
adjustments, plus (y) one percent (1.0%). The eurodollar interest rate was 5.7%
at September 30, 1997.

NOTE 8. STOCKHOLDERS' EQUITY:

On February 26, 1996, the Company's Board of Directors approved a 334-for-1
split of the Company's Common Stock to be effected in the form of a stock
dividend to the stockholders of record as of March 28, 1996. This stock split
has resulted in a reclassification of $112,695 and $187,003 from the Company's
additional paid-in capital and retained earnings accounts, respectively, to the
Company's Common Stock account, representing the par value of shares issued. All
share and per share amounts have been restated to retroactively reflect the
stock split. In addition, on February 26, 1996, the Board of Directors also
voted to retire and return to the status of authorized and unissued capital
stock all shares of Common Stock then held in the Company's treasury, and adopt
an amendment to the Articles of Organization of the Company to, among other
things, increase the authorized shares of Common Stock and Non-Voting Common
Stock to 30,000,000 and 1,000,000 shares, respectively, which was subsequently
approved by the stockholders of the Company.

On April 18, 1996, the Company completed an initial public offering of 6,900,000
shares of its common stock which generated net proceeds of $114.4 million. A
substantial part of the proceeds were used to redeem $20.6 million of Series A
preferred stock and accrued dividends, to repay the $34.7 million outstanding
principal amount and accrued interest under the secured term loan facility, to
repay the $10.3 million outstanding principal amount and accrued interest under
the senior subordinated notes and to repay the $5.1 million outstanding
principal amount and accrued interest under the Company's revolving credit
facility.

Stock Option Plans

In 1995, the Company's Board of Directors adopted, and the stockholders
approved, the 1995 Incentive and Nonstatutory Stock Option Plan. The Plan
provides for the grant of nonqualified and incentive stock options to employees
and others to purchase the Company's Common Stock. Options granted during fiscal
1995 provided for vesting over three years and expiration ten years after the
date of grant. Options granted during fiscal 1997 and 1996 provided for vesting
over five years and expiration ten years after the date of grant. At September
30, 1997 and 1996, 6,070,116 shares of Common Stock were authorized for issuance
under the plan.

A summary of the Company's stock option activity for the years ended September
30 follows:
<TABLE>
<CAPTION>
                                                   WEIGHTED
                                                    AVERAGE
                                      NUMBER       EXERCISE
                                  OF OPTIONS          PRICE
-----------------------------------------------------------
<S>                                <C>              <C>
Outstanding at
   September 24, 1994                668,000         $0.003
     Granted                       3,663,646           1.20
                                   ---------         ------
Outstanding at
   September 30, 1995              4,331,646           1.02
     Granted                       1,079,564           6.74
     Exercised                    (1,320,191)          0.59
     Canceled                        (27,165)          1.20
                                   ---------         ------
Outstanding at
   September 30, 1996              4,063,854           2.67
     Granted                         802,400          15.15
     Exercised                      (813,371)          1.52
     Canceled                       (495,364)         13.71
                                   ---------         ------
Outstanding at
   September 30, 1997              3,557,519        $  4.22
                                   =========         ======
</TABLE>

Statement of Financial Accounting Standards No. 123, "Accounting for Stock-Based
Compensation" ("SFAS 123"), requires that companies either recognize
compensation expense for grants of stock, stock options, and other equity
instruments based on fair value, or provide pro forma disclosure of net income
and earnings per share in the notes to the financial statements. The Company
adopted the disclosure provisions of SFAS 123 in 1997 and has applied APB
Opinion 25 and related interpretations in accounting for its stock option plans
in 1997. Accordingly, no compensation cost has been recognized for its stock

                                     F-10
<PAGE>   34
option plans. The effects of applying SFAS 123 in this pro forma disclosure are
not likely to be representative of the effects on reported income or loss for
future years. SFAS 123 does not apply to awards prior to 1996 and additional
awards in future years are anticipated.

At September 30, 1997, 1996 and 1995, respectively, options to purchase
2,080,823, 2,195,716, and 1,803,600 shares of Common Stock were exercisable with
a weighted average exercise price of $1.80, $1.20, and $1.20, respectively.
Exercise prices for options outstanding as of September 30, 1997 ranged from
$1.20 to $18.81. The weighted average remaining contractual life of those
options is 8.1 years.

The weighted average fair value of the Common Stock at date of grant for options
granted in 1997 and 1996 was $8.12 and $3.61 per option, respectively. The fair
value of these options at date of grant was estimated using the Black-Scholes
model with the following weighted average assumptions: a risk free interest rate
of 6.1% in 1997 and 5.4% in 1996; a dividend yield of 0%; a volatility factor of
the expected market price of the Company's Common Stock of 55% and a weighted
average expected life of the options of 5 years.

Had compensation cost for the Company's stock-based compensation plans been
determined based on the fair value at the grant dates as calculated in
accordance with SFAS 123, the Company's net income and earnings per share for
the years ended September 30, 1997 and 1996 would have been reduced to the pro
forma amounts indicated as follows:
<TABLE>
<CAPTION>

                       1997                     1996
                 -------------------------------------------
                            EARNINGS                EARNINGS
                                 PER                     PER
                 NET INCOME    SHARE    NET INCOME     SHARE
------------------------------------------------------------
<S>              <C>          <C>       <C>            <C>
As reported      $5,319,079    $0.26    $3,545,083     $0.21
Pro forma         3,970,478     0.19     2,696,238      0.16
</TABLE>

At September 30, 1997 and September 30, 1996, options to purchase 1,047,035 and
1,354,071 shares of Common Stock, respectively, were available for grant.

The following table summarizes information about stock options outstanding at
September 30, 1997:

<TABLE>
<CAPTION>
                     OPTIONS OUTSTANDING                           OPTIONS EXERCISABLE
----------------------------------------------------------------------------------------------
                                   REMAINING    WEIGHTED-                        WEIGHTED-
    RANGE OF           NUMBER     CONTRACTUAL    AVERAGE           NUMBER         AVERAGE
 EXERCISE PRICES    OUTSTANDING      LIFE     EXERCISE PRICE     EXERCISABLE    EXERCISE PRICE
----------------------------------------------------------------------------------------------
<S>                 <C>           <C>         <C>                <C>             <C>
        $ 1.20       2,221,459        7.6          $ 1.20          1,826,003        $ 1.20
          3.90         735,160        8.3            3.90            197,420          3.90
 11.00 - 13.50         270,900        9.1           12.36             57,400         13.50
 18.50 - 18.81         330,000        9.8           18.39                  -             -
  ------------        --------        ---          ------           --------        ------
                     3,557,519        8.1          $ 4.22          2,080,823        $ 1.80
</TABLE>


In connection with the Recapitalization, the Company accelerated the vesting of
options to purchase an aggregate of 2,442,208 shares of Common Stock granted to
certain executive officers during fiscal 1995, so as to make such options
exercisable in full immediately prior to the closing of the Recapitalization. On
January 24, 1996, an aggregate of 638,608 shares of Common Stock were issued to
such officers upon their exercise of such options.

NOTE 9. RECAPITALIZATION:

In January 1996, prior to its contemplation of an initial public offering, the
Company effected a Recapitalization, in which the Company repurchased 28,592,404
shares of Common Stock then issued and outstanding from NEMC and the other
stockholders of the Company for an aggregate of approximately $111.4 million. In
addition, Warburg, Pincus Ventures, L.P. ("WP Ventures") purchased from certain
executive officers of the Company an aggregate of 2,308,608 shares of Common
Stock, including an aggregate of 638,608 shares of Common Stock acquired by such
executive officers pursuant to their exercise of stock options, for an aggregate
of approximately $9.0 million. WP Ventures then contributed such shares of
Common Stock to the Company. The principal purpose of the Recapitalization was
to provide liquidity to the Company's existing stockholders while permitting
them to retain an ownership interest in the Company, and the Company has
accounted for the transaction as a leveraged recapitalization. To finance the
repurchase of these shares, the Company issued to certain institutional
investors 20,000 shares of Series A non-voting preferred stock for an aggregate
of $20.0 million, 33,512 shares of Series B convertible preferred stock
(convertible into 8,627,310 shares of Common Stock) for an aggregate of $33.6
million and 1,388 shares of Series C non-voting convertible preferred stock
(convertible into 356,262 shares of Common Stock) for an aggregate of $1.4
million. In addition, the Company entered into a secured term loan in the amount
of $35.0 million and received an advance of $5.0 million under a secured
revolving credit facility in the maximum principal amount of $15.0 million, and
issued Senior Subordinated Notes, due 2003, in the aggregate principal amount of
$10.0 million (the "Senior Subordinated Notes"). The holder of the Senior

                                     F-11
<PAGE>   35
Subordinated Notes also received a warrant to acquire an aggregate of 297,928
shares of non-voting common stock at an initial exercise price of $3.90 per
share, subject to adjustment in certain circumstances. In addition, in the
second quarter of fiscal 1996 the Company incurred a non-cash compensation
charge of $3.0 million. This compensation charge arose from the purchase by the
Company (both directly and indirectly, through WP Ventures) from certain of its
executive officers of 972,608 shares of Common Stock that had been acquired by
such officers immediately prior to the Recapitalization through the exercise of
employee stock options. The amount of the compensation charge is equal to the
difference between the aggregate $765,800 exercise price paid by such officers
upon such exercise and the $3,789,764 of aggregate proceeds received by the
officers from the purchase by the Company of such shares.

NOTE 10. EXTRAORDINARY ITEM:

In fiscal 1996, the Company incurred an extraordinary loss of approximately
$2,149,000 representing the after tax effect of the write-off of approximately
$3,642,000 of unamortized capitalized financing costs. These costs were
attributable to indebtedness incurred in the Recapitalization that was repaid
out of the proceeds of the Company's initial public offering.

NOTE 11. PREFERRED STOCK DIVIDEND:

The holders of the Series A preferred stock (issued in connection with the
Recapitalization on January 24, 1996) were entitled to receive, when and as
declared by the Board of Directors, out of funds legally available therefore,
preferential cumulative dividends at the rate of 12% per annum. The Company was
not obligated to pay dividends prior to the redemption of the Series A preferred
stock, and no dividends were declared by the Board. The Series A preferred stock
was subject to mandatory redemption, provided funds were legally available
therefore, upon the closing of an initial public offering or the sale of the
Company, but in no event later than January 2006. Upon the closing of the
Company's initial public offering, on April 23, 1996, at which time funds became
legally available for the redemption of the Series A preferred stock and payment
of dividends, the Company redeemed in full the Series A preferred stock and paid
dividends thereon from the date of the Recapitalization.


NOTE 12. INCOME TAXES:

Provision for income taxes consists of the following:

<TABLE>
<CAPTION>
                          1997          1996           1995
-------------------------------------------------------------
<S>                 <C>          <C>             <C>
Federal:
   Current          $4,535,392   $ 5,129,464     $3,967,648
   Deferred          2,090,046    (1,412,919)      (624,593)
                     ---------    ----------      ---------
                     6,625,438     3,716,545      3,343,055
State:
   Current             646,054       835,029      1,141,000
   Deferred            357,823      (227,278)      (134,874)
                     ---------    ----------      ---------
                     1,003,877       607,751      1,006,126
                     ---------    ----------      ---------
Provision for
   income taxes     $7,629,315   $ 4,324,296     $4,349,181
                     =========    ==========      =========
</TABLE>

A reconciliation between the Company's effective rate and the U.S.
statutory rate is as follows:

<TABLE>
<CAPTION>
                            SEPTEMBER     SEPTEMBER     SEPTEMBER
                            30, 1997      30, 1996      30, 1995
-----------------------------------------------------------------
<S>                         <C>           <C>           <C>
U.S. statutory rate           35.0%         35.0%         35.0%
State taxes, net of
   federal benefits            5.0           5.6           6.0
Acquired in-process
   research and
   development                17.0             -             -
Other                          1.9             -           2.6
                              ----           ---           ---
Effective income tax rate     58.9%         40.6%         43.6%
                              ====           ===           ===
</TABLE>

                                     F-12
<PAGE>   36
Components of the Company's deferred tax liabilities and assets are as follows:

<TABLE>
<CAPTION>                                SEPTEMBER 30,
                                      1997           1996
-----------------------------------------------------------
<S>                                <C>           <C>
Capitalized software               $(576,219)    $ (597,164)
Depreciation                         103,252        112,164
Accounts receivable reserve           51,059         51,469
Accrued vacation                     280,165        183,076
Reserves and other                   498,871        418,019
Revenue recognition                        -      1,409,436
Compensation charge                        -      1,228,000
                                    --------      ---------
Net deferred tax assets            $ 357,128     $2,805,000
                                    ========      =========
</TABLE>

There are no valuation allowances recorded against the Company's deferred tax
assets, since taxable income in the carryback period is sufficient to realize
the benefit of future deductions.

NOTE 13. EMPLOYEE BENEFIT PLANS:

401(k) Plan

The Company maintains a savings plan for its eligible employees under Section
401(k) of the Internal Revenue Code. The plan allows employees to defer up to a
percentage of their income equal to the lesser of the IRS statutory rate or 15%
on a pre-tax basis through contributions to the plan. Contributions by the
Company under this plan are discretionary. Total contributions by the Company
under the plan approximated $306,000, $263,000 and $214,000 in fiscal years
1997, 1996 and 1995, respectively.

The Company previously obtained health benefit plans through NEMC (see Note 6).
Beginning January 1, 1996, the Company established independent health benefit
plans for its employees that provide a similar level of benefits.

Employee Stock Purchase Plan

In 1996, the Company adopted an Employee Stock Purchase Plan (the "Stock
Purchase Plan"), under which employees may purchase up to 300,000 shares of
Common Stock.

During each six-month offering period under the Stock Purchase Plan,
participating employees are entitled to purchase shares through payroll
deductions. The maximum number of shares which may be purchased is determined on
the first day of the offering period pursuant to a formula under which a
specific percentage of the employee's projected base pay for the offering period
is divided by a percentage of the market value of one share of Common Stock on
the first day of the offering period. During each offering period, the price at
which the employee will be able to purchase the Common Stock will be a specific
percentage of the last reported sale price of the Common Stock of the NASDAQ
National Market on the date on which the offering period commences or concludes,
whichever is lower.

The Stock Purchase Plan is administered by the Compensation Committee. All
employees, other than certain highly-compensated employees, who meet certain
minimum criteria based on hours worked per week and length of tenure with the
Company are eligible to participate in the Stock Purchase Plan. No employee may
purchase shares pursuant to the Stock Purchase Plan if, after such purchase such
employee would own more than five percent of the total combined voting power or
value of the securities of the Company.

NOTE 14. COMMITMENTS:

The Company leases office and office equipment under operating lease
arrangements which expire on various dates through 2001. Certain operating lease
arrangements include options to renew for additional periods or payment terms
that are subject to increases due to taxes and other operating costs of the
lessor. Future minimum lease commitments, by year and in the aggregate, under
these long-term noncancelable operating leases consist of the following at
September 30, 1997:

<TABLE>
<CAPTION>
                                                  OPERATING
FISCAL YEAR                                          LEASES
-----------------------------------------------------------
<S>                                                <C>
1998                                               $659,311
1999                                                601,710
2000                                                493,411
2001                                                 53,057
                                                  ---------
Total minimum lease payments                     $1,807,489
                                                  =========
</TABLE>



                                     F-13
<PAGE>   37
Rent expense amounted to $552,578, $369,569 and $380,019 in fiscal years 1997,
1996 and 1995, respectively.

The Company has an agreement with a vendor of third-party software to pay a
fixed annual license fee through June 1998. In addition, under the agreement the
Company is entitled to obtain maintenance services from the vendor on an annual
basis for an additional fixed fee. Aggregate annual expenses under the agreement
as renegotiated are expected to approximate $2,000,000. Aggregate license and
maintenance fees under this agreement were $2,000,000, $2,004,000 and $1,675,200
for fiscal years 1997, 1996 and 1995, respectively.

NOTE 15. CONSOLIDATION AND ACQUISITIONS:

On July 22, 1996, the Company acquired substantially all of the outstanding
stock and a note held by a selling principal of Enterprising HealthCare, Inc.
("Enterprising HealthCare"), based in Tucson, Arizona, for a total purchase
price of approximately $1.8 million in cash. Enterprising HealthCare provides
system integration products and services for the health care market.

The acquisition was accounted for under the purchase method with the results of
Enterprising HealthCare included from July 22, 1996. Purchased technology costs
of $1.6 million are being amortized on a straight-line basis over 7 years. Pro
forma results of operations have not been presented, as the effect of this
acquisition on the financial statements was not material.

On September 19, 1997, the Company acquired all outstanding shares of Vital
Software Inc. ("Vital"), a privately held developer of products that automate
the clinical processes unique to medical oncology. The purchase price was
approximately $6.3 million, which was comprised of $2.7 million in cash and
252,003 shares of the Company's common stock with a value of $3.6 million.

The purchase price was allocated entirely to purchased research and development.
Purchased research and development, which had not reached technological
feasibility and which had no alternative future use, was valued using a risk
adjusted cash flow model, under which expected future cash flows associated with
in-process research and development were discounted considering risks and
uncertainties related to the viability of and potential changes in future target
markets and to the completion of the products that will be ultimately marketed
by Transition Systems, Inc. Purchased research and development, which is not
deductible for tax purposes, was charged to operations at the acquisition date.
Vital's operating results have not been included in the consolidated financial
statements from the date of acquisition due to immateriality.






                                     F-14
<PAGE>   38




                                    SIGNATURE

        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, in the City of Boston,
Commonwealth of Massachusetts as of December, 1997.


                                       TRANSITION SYSTEMS, INC.

                                       By /s/ Robert F. Raco
                                          -------------------------------------
                                          Robert F. Raco
                                          President and Chief Executive Officer


                                POWER OF ATTORNEY

        Each individual whose signature appears below hereby constitutes and
appoints Robert F. Raco, Donald C. Cook, Christine Shapleigh and Paula J.
Malzone, and each of them, his true and lawful attorneys-in-fact and agents with
full power of substitution, for him and in his name, place and stead, in any and
all capacities, to sign any and all amendments to this Form 10-K, and to file
the same, with all exhibits thereto, and all documents in connection therewith,
with the Securities and Exchange Commission, granting unto said
attorneys-in-fact and agents, and each of them, full power and authority to do
and perform each and every act and thing which they, or any of them, may deem
necessary or advisable to be done in connection with this Form 10-K, as fully to
all intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorneys-in-fact and agents or any of them, or any
substitute or substitutes for any or all of them, may lawfully do or cause to be
done by virtue hereof.

        Pursuant to the requirements of the Securities Exchange Act of 1934,
this report has been signed below by the following persons on behalf of the
registrant and in the capacities on and on the dates indicated.


SIGNATURES                 TITLE                              DATE
----------                 -----                              ----

/s/ Robert F. Raco         President, Chief Executive         December 24, 1997
------------------------   Officer and Director
Robert F. Raco             (Principal Executive Officer)


/s/ Paula Malzone          Chief Financial Officer            December 24, 1997
------------------------   (Principal Financial and
Paula Malzone              Accounting Officer)


/s/ Patrick T. Hackett     Director                           December 24, 1997
------------------------
Patrick T. Hackett


/s/ Robert S. Hillas       Director                           December 24, 1997
------------------------
Robert S. Hillas


/s/ Peter Van Etten        Director                           December 24, 1997
------------------------
Peter Van Etten


/s/ Allen F. Wise          Director                           December 24, 1997
------------------------
Allen F. Wise