UT Southwestern Medical Center has announced that Dr. John Warner has been named chief executive officer for UT Southwestern Hospitals, effective Feb. 1. As one of the leaders of the planning process for the new 460-bed hospital scheduled to open in 2015, Dr. Warner understands UT Southwestern?s clinical programs and the systems needed to support them. Formerly assistant vice president for hospital planning, Dr. Warner is an interventional cardiologist who serves as medical director of the Doris and Harry W. Bass Jr. Clinical Center for Heart, Lung, and Vascular Disease. He joined the UT Southwestern faculty in 2003 and is currently an associate professor.