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