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