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