| Advantage Health Network |
| *Aetna Healthcare BMT |
| *Aetna Healthcare HMO |
| *Aetna Healthcare PPO |
| *Affiliated Health Funds PPO |
| All Care Medical Group, Inc. |
| Allied Physicians IPA and affiliates |
| Antelope Valley Medical Group / Prospect |
| Axminster Medical Group, Inc. |
| Beaver Medical Group |
| Bella Vista Medical Group |
| *Beech Street PPO |
| *Blue Cross/Blue Shield Association BMT |
| *Blue Cross of California PPO |
| *Blue Shield of California PPO |
| Bright Medical Associates |
| Bristol Park Medical Group |
| *Cigna HealthCare HMO |
| *Cigna HealthCare PPO |
| *Cigna HealthCare BMT |
| Coachella Valley Physicians |
| Community Medical Group of the West Valley |
| *Coventry Health PPO |
| *Envisioncare Triage-Advocare PPO |
| *First Health Network PPO |
| Gateway Medical Group/Prospect |
| Gateway Physicians Medical Associates/Prospect |
| Genesis Healthcare |
| Global Care Medical Group |
| Greater Orange County Medical Center dba Diamond Bar Medical Group |
| Greater San Gabriel Valley Physicians IPA |
| Health Care of Los Angeles |
| Healthsource Medical Group/Prospect |
| Hight Desert Medical Group |
| *Interlink Health Services BMT |
| *Interlink Health Services PPO |
| *Kaiser Permanente BMT |
| *LifeTrac Transplant Network BMT |
| Mission Community IPA |
| Mission Hospital Affiliated Physicians |
| Monarch Healthcare, A Medical Group, Inc. |
| Nuestra Familia/Prospect |
| Ojai Valley Community Medical Group |
| *One Health Plan of California, inc. (Great West) |
| Pacific Independent Physician |
| *PacifiCare of California BMT |
| *PacifiCare of California PPO |
| Pegasus Medical Group/Prospect |
| Physician Associates of Greater San Gabriel Valley |
| Physicians of Greater Long Beach IPA |
| PrimeCare Medical Group |
| PrimeCare Medical Group of Redlands |
| PrimeCare of Chino Valley |
| PrimeCare of Citrus Valley |
| PrimeCare of Corona |
| PrimeCare of Hemet Community |
| PrimeCare of Inland Valley |
| PrimeCare of Moreno Valley |
| PrimeCare of Riverside |
| PrimeCare of San Bernardino |
| PrimeCare of Sun City |
| PrimeCare of Temecula |
| Prospect Medical Group |
| Prospect Professional Care Medical Group |
| *Protocol Tertiary Networks BMT |
| *Protocol Tertiary Networks PPO |
| Riverside Family Medical Group |
| Riverside Medical Clinic |
| Sierra Medical Group/Prospect |
| St. Josephs Affiliated Physicians |
| St. Josephs Health Foundation |
| St. Josephs Heritage Medical Group (St. Joseph Heritage Healthcare) |
| St. Jude Heritage Medical Group |
| St. Jude Heritage |
| *United HealthCare PPO |
| *United Resource Networks BMT |
| *United Resource Networks |
| *Universal Care BMT |
| *Universal Care HMO |
| *Universal Care PPO |
| *Universal Health Network / Nevada Preferred PPO |
| Valley Physicians of Central CA MA |
| Victor Valley IPA |