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