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