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