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