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