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