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