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