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