Catalyst Health Solutions, Inc. To Report Third Quarter Earnings Results On November 1, 2011

Catalyst Health Solutions, Inc. (NASDAQ: CHSI), a pharmacy benefit management company, will release its third quarter earnings results on Tuesday, November 1, 2011, after the market closes.

The Company will hold a conference call on Wednesday, November 2, 2011, at 8:00 a.m. Eastern time. To participate, call 1-800-378-9501, access code 7709242 ten minutes prior to the scheduled start time, and request to be connected to the Catalyst Health Solutions Q3 2011 Earnings Call.

Following brief opening remarks, the conference call will be open for a question-and-answer session. The conference call will be available for telephonic replay from November 2 ^nd, after 1:00 p.m. Eastern time, through November 12 ^th at 1:00 p.m. Eastern time. To access the replay, dial 1-888-203-1112, replay access code 7709242.

About Catalyst Health Solutions, Inc. ( www.chsi.com ):

Catalyst Health Solutions, Inc., the fastest-growing national PBM in the U.S., is built on strong, innovative principles in the management of prescription drug benefits and provides an unbiased, client-centered philosophy resulting in industry-leading client retention rates. The Company's subsidiaries include Catalyst Rx, a full-service pharmacy benefit manager (PBM) serving more than 18 million lives in the United States and Puerto Rico; HospiScript Services, LLC, one of the largest providers of PBM services to the hospice industry; FutureScripts, LLC, a full-service PBM serving approximately 1 million lives in the mid-Atlantic region, and Immediate Pharmaceutical Services, Inc., a fully integrated prescription mail service facility in Avon Lake, Ohio. The Company's clients include self-insured employers, including state and local governments, managed care organizations, unions, hospices, third-party administrators and individuals.

This press release may contain "forward-looking statements" as defined in the Private Securities Litigation Reform Act of 1995. These statements involve a number of risks and uncertainties that might materially affect our results, particularly those risks referred to in our Annual Report on Form 10-K for the year ended December 31, 2010, and in our Quarterly Report on Form 10-Q for the quarter ended June 30, 2011, under "Item 1A. Risk Factors." Readers are urged to carefully review and consider the various disclosures made in our Annual Report on Form 10-K, our Forms 10-Q, and our other filings with the Securities and Exchange Commission that attempt to advise interested parties of the risks and uncertainties that may affect our business. Catalyst Health Solutions, Inc. does not undertake any obligation to update forward-looking statements, whether as a result of new information, future events, or other developments.