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