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