For more information, please contact either listing below:

Prospect Medical Holdings, Inc.
Linda Hodges,
Executive Vice President
(310) 337.4170
linda.hodges@prospectmedical.com

Investor Relations Counsel:
The Equity Group Inc.
Devin Sullivan
(212) 836-9608
dsullivan@equityny.com

FOR IMMEDIATE RELEASE

PROSPECT MEDICAL HOLDINGS SCHEDULES FISCAL 2007 SECOND QUARTER FINANCIAL RESULTS AND CONFERENCE CALL

Culver City, CA— May 10, 2007— Prospect Medical Holdings, Inc. (AMEX: PZZ) ("Prospect"), which manages the medical care of individuals enrolled in managed care (HMO) plans in Southern California, announced today that it will issue its financial results for the fiscal 2007 second quarter, ended March 31, 2007, on Tuesday, May 15, 2007 immediately after the close of the stock market. Management will conduct a conference call that afternoon at 4:30 pm Eastern Time to discuss these results.

Interested parties may participate in the call by dialing (866) 820-1713 (Domestic) or (706) 643-3137 (International) approximately 10 minutes before the call is scheduled to begin and ask to be connected to the Prospect Medical conference call. A recorded replay of the call will be available until 11:59 pm Eastern Time on Tuesday, May 22, 2007. Listeners may dial (800) 642-1687 (Domestic) or (706) 645-9291 (International) and use the code 8620958 for the replay. In addition, the conference call will be broadcast live over the Internet at http://audioevent.mshow.com/332040/. To listen to the live call on the Internet, go to the web site at least 15 minutes early to register, download and install any necessary audio software. If you are unable to participate in the live call, the conference call will be archived and can be accessed for approximately 90 days.

ABOUT THE COMPANY

Prospect Medical Holdings manages the medical care of individuals enrolled in HMO plans in Southern California. The Company, through its Independent Physician Associations ("IPAs"), contracts with health care professionals to provide a full range of services to HMO enrollees. Prospect does not acquire bricks and mortar, but rather the medical management of the lives serviced by the acquired IPAs. Services provided by Prospect include contract negotiations, physician recruiting and credentialing, HR, claims administration, financial services, provider relations, case management, quality assurance, data collection and MIS. Prospect's 11 affiliated IPAs at December 31, 2006 were comprised of approximately 9,000 primary care and specialist physicians serving approximately 171,000 HMO members.