Prospect Medical Holdings, Inc. (NASDAQ: PZZ) (?Prospect? or the ?Company?) today announced that it has been added to the list of public companies that comprise the Russell 2000® Index. In addition, Prospect was added to the Russell Global Index. Prospect's inclusion became effective on Monday, June 28, 2010, following the Russell Investment Group's annual reconstitution of these indexes.

Prospect believes that its inclusion in the Russell Index is evidence of its continued growth and development as a company over the last several years, including integrating and then improving the operations of four separate companies, generating annualized revenue and Adjusted EBITDA of approximately $467 million and $60 million, respectively, at March 31, 2010, while continuing to deliver high quality care to its southern California patient population.

ABOUT PROSPECT MEDICAL HOLDINGS

Prospect Medical Holdings owns and operates five community-based hospitals in the greater Los Angeles area, and manages the provision of healthcare services of HMO enrollees in southern California, through its network of specialist and primary care physicians. Prospect Medical Holdings' website can be found at www.prospectmedicalholdings.com.

ABOUT RUSSELL

Russell Investments provides strategic advice, world-class implementation, state-of-the-art performance benchmarks and a range of institutional-quality investment products. Russell has $179 billion in assets under management as of March 31, 2010, and serves individual, institutional and advisor clients in more than 40 countries. Founded in 1936, Russell is a subsidiary of The Northwestern Mutual Life Insurance Company.

This press release contains forward-looking statements. Additional written or oral forward-looking statements may be made by Prospect from time to time, in filings with the Securities and Exchange Commission, or otherwise. Statements contained herein that are not historical facts are forward-looking statements. Investors are cautioned that forward-looking statements, including the statements regarding anticipated or expected results, involve risks and uncertainties which may affect the Company's business and prospects, including those outlined in Prospect's Form 10-K filed on December 21, 2009, Form 10-Q filed on May 17, 2010 and other filings. Any forward-looking statements contained in this press release represent our estimates only as of the date hereof, or as of such earlier dates as are indicated, and should not be relied upon as representing our estimates as of any subsequent date. While we may elect to update forward-looking statements at some point in the future, we specifically disclaim any obligation to do so, even if our estimates change.

Prospect Medical Holdings, Inc.
Adam Goldston, 310-943-4503
Senior Vice President
adam.goldston@prospectmedical.com
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INVESTOR RELATIONS:
The Equity Group Inc.
Devin Sullivan, 212-836-9608
dsullivan@equityny.com