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