John Warner UT Southwestern Medical Center Executive Vice President, Health Affairs After leading UT Southwestern University Hospitals as CEO since February 2012, John Warner, M.D., was named Executive Vice President for Health System Affairs, as of March 1, 2018. As the EVP, he oversees the UT Southwestern clinical enterprise, which encompasses the delivery of care to more than 100,000 inpatients and approximately 2.2 million outpatient visits annually at UT