A native of Sioux City, Iowa, Dr. Katsis moved to Tulsa in 1984 to attend Oral Roberts University. Following graduation, he attended the University of Nebraska College of Medicine, where he received his medical degree in 1993.
He returned to Tulsa for his residency in general surgery at the OU Health Sciences Center. Dr. Katsis completed fellowship training in trauma and surgical care at the University of Tennessee-Memphis College of Medicine. His fellowship was conducted at the Elvis Presley Memorial Trauma Center in Memphis, one of the busiest trauma centers in the nation. Dr. Katsis specializes in bariatric surgery.