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