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