Memorial Hermann Health System is the largest not-for-profit health system in southeast Texas and consists of 17 hospitals, 8 Cancer Centers, 3 Heart & Vascular Institutes, and 27 sports medicine and rehabilitation centers, in addition to other outpatient and rehabilitation centers. It was formed in the late 1990s when the Memorial and Hermann systems joined. Both the Memorial and Hermann health care systems started in the early 1900s. The administration is housed in the new Memorial Hermann Tower, along with the existing System Services Tower, of the Memorial Hermann Memorial City Medical Center.
Memorial Hermann–Texas Medical Center was opened in 1925. It was the first of two hospitals with a Level I trauma center rating to be located in Houston, inside the Texas Medical Center. It is the flagship of a large system of hospitals and clinics located in and around the greater Houston area, in various neighborhoods as well as some suburbs. The different hospitals are distinguished by further designation indicating their location. The hospital system has been headed by some of the most influential leaders in healthcare including Dan Wolterman, Dr. Benjamin K. Chu as well as the current President & CEO David L. Callender, MD