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