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