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