Urology Dr. Thomas W. Hepperlen specializes in Urology, the branch of medicine that deals with the diagnosis and treatment of disorders related to the urinary tract or urogenital system. Dr. Hepperlen provides urology services at the Falls Memorial Hospital once a month. Dr. Hepperlen received his medical degree from the University of Nebraska and completed his residency in Urology from the University of Nebraska. Dr. Hepperlen is affiliated with St. Lukes Regional Medical Center in Sioux City, Iowa and the Mercy Medical Center, also located in Sioux City.