| Adventist Health |
| Aetna (Managed Care & EPO plans) |
| Apollo/CBA |
| Beech Street |
| Benefit Planners |
| Blue Cross of California |
| Blue Shield of California |
| CBA |
| CCN (Community Care Network) |
| Champus Tricare PPO / TriWest |
| Delta |
| First Health |
| Foundation for Medical Care |
| GEHA |
| GEMCare (Golden Empire Managed Care) |
| Great-West |
| Health Comp |
| Health Net (not the Medi-Cal plan) |
| Interplan |
| IPS-Blue Cross |
| Kern Family Health Care |
| Master Care IPA |
| Medi-Cal |
| Medicare |
| MultiPlan |
| Northern California Bakery Drivers |
| Operating Engineers (Northern CA) |
| Pacific Life |
| PHCS (Private Health Care Systems) |
| PHN (Preferred Health Network) |
| Pinnacle |
| Southern California Drug Benefit |
| Sunview |
| Teamsters |
| Transwestern |
| UFCW |
| United Healthcare |
| Western Growers |
| Wholesale Beer Distributors |
