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