- Aetna
- Anthem Blue Cross
- Brown and Toland Physicians (All HMO Plans)
- Blue Shield
- Chinese Community Health Plan
- CIGNA
- Health Net
- Humana/Choice Care Network
- Interplan Health Group
- Mailhandlers
- MediCal (Except for medical HMO)
- Medicare
- MultiPlan
- NEMS
- PacificCare
- Sutter Select
- United Healthcare