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