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