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