CHRISTUS Health Selects athenahealth to Support New Electronic Health Record Platform for its CHRISTUS Provider Network

Leading Not-for-Profit Physician Network to Deploy athenahealth's Full Suite of Services to Drive Better Quality Reporting and Patient Care Across its Growing Enterprise

athenahealth, Inc. (NASDAQ: ATHN), a leading provider of web-based practice management, electronic health record, and patient communication services to medical groups, today announced that CHRISTUS Health, a leading Texas-based, not-for-profit, healthcare company that includes more than 50 hospitals and healthcare facilities in nine states, has selected athenahealth's full suite of web-based services for its rapidly growing CHRISTUS Provider Network (CPN) which is currently comprised of over 150 medical providers across more than 40 clinics in Arkansas, Louisiana, and Texas.

CHRISTUS Health will implement athenaClinicals^SM, athenahealth's electronic health record service, as the backbone of a new clinical platform designed to drive better coordination of care between doctors and their patients. The platform will also enable their providers to participate in new government incentive programs like the HITECH Act. CHRISTUS Health will also leverage athenahealth's web-based physician medical billing and practice management service and medical scheduling service—athenaCollector® and athenaCommunicator^SM—as part of its larger enterprise-wide connectivity strategy. All three services are delivered over athenahealth's centrally hosted physician network, athenaNet®, and together will allow CHRISTUS Health and its growing physician network to support improved communications with patients across the care continuum.

"athenahealth will play a critical role as CHRISTUS Health looks to execute on a major clinical connectivity platform for our growing provider network that will facilitate more effective transfers of clinical and administrative health information across our enterprise. This flow of information is essential in order to improve patient care, reduce costs, and successfully participate in new government incentive programs," Donna J. Mikulecky, President and CEO of the CPN. "Some of our physician practices have been using athenahealth's medical billing and practice management system since 2006, and we feel athenahealth has stood apart for its ability to deliver web-based, easily deployed, and flexible clinical and administrative services that are uniquely aligned with the success of our physicians' practices."

Jonathan Bush, Chairman and CEO of athenahealth added, "Legacy software systems have long kept valuable clinical information siloed, and because they support a static environment, they fall out of step with regulations that impact the administration of care. CHRISTUS Health recognized the benefits of bringing health information out from behind individual server walls, allowing physicians to better manage and coordinate patient care, across all points of care, as well as be compliant with payer protocols and government regulations and incentives as they change and grow more complex. We believe that a connectivity strategy that takes advantage of the utility inherent in the web will drive results across the CPN."

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About CHRISTUS Health

CHRISTUS Health, an international Catholic, faith-based, not-for-profit health system, is headquartered in Dallas and is comprised of almost 350 services and facilities, including more than 50 hospitals and long-term care facilities, 175 clinics and outpatient centers and dozens of other health ministries and ventures. CHRISTUS services can be found in over 60 cities in Texas, Arkansas, Iowa, Louisiana, Missouri, New Mexico, Georgia, Utah and Mexico. The system employs approximately 30,000 Associates and has over 10,000 physicians on facility medical staffs that provide care and support for patients. CHRISTUS Health is listed among the top ten Catholic health systems in the U.S.

About athenahealth

athenahealth, Inc. is a leading provider of web-based business services for medical groups. athenahealth's service offerings are based on proprietary web-native practice management and electronic health record (EHR) software, a continuously updated payer knowledge-base, integrated back-office service operations, and automated and live patient communication services. For more information, please visit www.athenahealth.com or call [phone].

This press release contains forward-looking statements, which are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995, including statements regarding the benefits of and prospective markets for athenahealth's service offerings. These statements are neither promises nor guarantees, and are subject to a variety of risks and uncertainties, many of which are beyond our control, which could cause actual results to differ materially from those contemplated in these forward-looking statements. In particular, the risks and uncertainties include, among other things: the risk that our service offerings will not operate in the manner that we expect, due to design flaws, security breaches, or otherwise; potential interruptions or delays in our internet-based service offerings; our reliance upon third parties, such as computer hardware, software, data-hosting, and internet infrastructure providers, which reliance may result in failures or disruptions in our service offerings; errors or omissions included in our payer and clinical intelligence rules engine and database; and the evolving and complex government regulatory compliance environment in which we and our clients operate. Existing and prospective investors are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof. athenahealth undertakes no obligation to update or revise the information contained in this press release, whether as a result of new information, future events or circumstances, or otherwise. For additional disclosure regarding these and other risks faced by athenahealth, please see the disclosure contained in our public filings with the Securities and Exchange Commission, available on the Investors section of our website at http://www.athenahealth.com and on the SEC's website at http://www.sec.gov.

Contacts:

CHRISTUS Health
Abby Lowe, 214-492-8513
Senior Communications Specialist
[e-mail]
or
athenahealth, Inc.
John Hallock (Media), 617-402-1428
Director, Corporate Communications
[e-mail]
or
Jennifer Heizer (Investors), 617-402-1322
Director, Investor Relations
[e-mail]