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