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