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