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