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