| 1199SEIU in Rancho Santa Margarita, CA | AMERIGROUP in Rancho Santa Margarita, CA |
| APS Healthcare in Rancho Santa Margarita, CA | Aetna in Rancho Santa Margarita, CA |
| Alliance in Rancho Santa Margarita, CA | AmeriHealth in Rancho Santa Margarita, CA |
| American Behavioral in Rancho Santa Margarita, CA | Beech Street in Rancho Santa Margarita, CA |
| Behavioral Health Systems in Rancho Santa Margarita, CA | BlueCross and/or BlueShield in Rancho Santa Margarita, CA |
| CCN in Rancho Santa Margarita, CA | CHIPA/College Health in Rancho Santa Margarita, CA |
| Cascade Health in Rancho Santa Margarita, CA | Ceridian in Rancho Santa Margarita, CA |
| ChoiceCare in Rancho Santa Margarita, CA | Cigna in Rancho Santa Margarita, CA |
| ComPsych in Rancho Santa Margarita, CA | Corphealth in Rancho Santa Margarita, CA |
| Coventry in Rancho Santa Margarita, CA | First Choice Health in Rancho Santa Margarita, CA |
| First Health in Rancho Santa Margarita, CA | GHI/Group Health Incorporated in Rancho Santa Margarita, CA |
| Great-West in Rancho Santa Margarita, CA | Guardian in Rancho Santa Margarita, CA |
| HFN in Rancho Santa Margarita, CA | HIP/Health Plan of New York in Rancho Santa Margarita, CA |
| Harvard Pilgrim Health Care in Rancho Santa Margarita, CA | Health Net in Rancho Santa Margarita, CA |
| Holman Group in Rancho Santa Margarita, CA | Horizon Healthcare in Rancho Santa Margarita, CA |
| Humana in Rancho Santa Margarita, CA | Integrated Health Plan in Rancho Santa Margarita, CA |
| Interplan in Rancho Santa Margarita, CA | Kaiser in Rancho Santa Margarita, CA |
| LifeWise in Rancho Santa Margarita, CA | MAMSI in Rancho Santa Margarita, CA |
| MHN/Managed Health Network in Rancho Santa Margarita, CA | Magellan Behavioral Health in Rancho Santa Margarita, CA |
| MagnaCare in Rancho Santa Margarita, CA | Medica in Rancho Santa Margarita, CA |
| Medicaid in Rancho Santa Margarita, CA | Medical Mutual in Rancho Santa Margarita, CA |
| Medicare in Rancho Santa Margarita, CA | Multiplan in Rancho Santa Margarita, CA |
| NCPPO in Rancho Santa Margarita, CA | ODS in Rancho Santa Margarita, CA |
| Oxford in Rancho Santa Margarita, CA | PHCS/Private Health Care Systems in Rancho Santa Margarita, CA |
| PPOM in Rancho Santa Margarita, CA | PacifiCare in Rancho Santa Margarita, CA |
| PacificSource in Rancho Santa Margarita, CA | PreferredOne in Rancho Santa Margarita, CA |
| Providence in Rancho Santa Margarita, CA | Sloans Lake in Rancho Santa Margarita, CA |
| TRICARE in Rancho Santa Margarita, CA | TriWest0127 in Rancho Santa Margarita, CA |
| Tufts in Rancho Santa Margarita, CA | UniCare in Rancho Santa Margarita, CA |
| Uniform in Rancho Santa Margarita, CA | United in Rancho Santa Margarita, CA |
| VMC in Rancho Santa Margarita, CA | ValueOptions in Rancho Santa Margarita, CA |
| WellPoint in Rancho Santa Margarita, CA |