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