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