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