Exhibit 21.1
Name of Subsidiary | Doing Business As (If Different from Corporate | Jurisdiction of Incorporation or Organization | ||
| Urology Associates of North Texas, PLLC | Texas | |||
| The Medical Clinic of North Texas, Inc. | Texas | |||
| Impel Management Services, L.L.C. | Texas | |||
| Impel Consulting Experts, LLC | Texas | |||
| Rocky Mountain Medical Center, L.P. | Texas | |||
| Surgery Center of Waxahachie, LP | Texas | |||
| Mat-Rx Development, LLC | USMD Hospital Division | Texas | ||
| USMD of Arlington GP, LLC | Texas | |||
| U.S. Lithotripsy, L.P. | USMD Lithotripsy Division | Texas | ||
| USMD Cancer Treatment Centers, LLC | Texas | |||
| USMD Diagnostic Services, LLC | Texas | |||
| USMD Inc. | Texas | |||
| Mat-Rx Fort Worth GP, LLC | Texas | |||
| USMD Administrative Services, LLC | Texas | |||
| USGP, LLC | Texas | |||
| Litho GP, LLC | Texas | |||
| Big Country II Lithotripsy, L.P. | Texas | |||
| Dallas Stone Management, L.P. | Texas | |||
| Ironwood Stone Management, L.P. | Texas | |||
| Tyler Stone Management, Ltd. | Lithotripsy of East Texas | Texas | ||
| Metro I Stone Management, Ltd. | Texas | |||
| Midland Stone Management, L.P. | Texas | |||
| Mississippi Valley I Stone Management, L.P. | Oklahoma | |||
| White River Lithotripsy, L.P. | Arkansas | |||
| Western Plains II Lithotripsy, L.P. | Texas | |||
| North Central Missouri III Lithotripsy, L.P. | Texas | |||
| North Texas Stone Management, L.P. | Texas | |||
| Verrazano Lithotripsy, L.P. | Texas | |||
| East Texas II – Athens, L.P. | Texas | |||
| East Texas II – Longview, L.P. | Texas | |||
| S.E. Colorado Lithotripsy, L.P. | Texas | |||
| Kenai Lithotripsy, L.P. | Alaska | |||
| Metro Houston Lithotripsy II, L.P. | Texas | |||
| Houston II Lithotripsy, L.P. | Texas | |||
| Millennium Lithotripsy, L.P. | Texas | |||
| Gateway II Lithotripsy, LLC | Missouri | |||
| Rio Grande Lithotripsy, L.P. | Texas | |||
| South Texas Lithotripsy, L.P. | Texas | |||
| USMD Hospital at Arlington, L.P. | Texas | |||
| USMD Hospital at Ft. Worth, L.P. | Texas | |||
| Anchorage Cancer Treatment Center, LLC | Alaska | |||
| MXMD Centros De Cancer, S. De R.L. De C.V. | Mexico City, F.D., Mexico | |||
| Christus Muguerza Radio Terapia Avanzada, S.D. R.L. De C.V. | Nuevo Leon, Mexico | |||
| Yorktown Center for Radiation Oncology Services, L.L.C. | New York | |||
| USMD Affiliated Services* | Texas |
