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