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