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