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