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