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