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