Dr. Koff is a board-certified and fellowship-trained gastroenterologist.

During his 11-year Army career he spent two years as an Internist at the Army clinic in the Pentagon, was a first responder on 9-11, and served a tour in Iraq at the 31st Combat Support Hospital in Mosul.

After leaving the Army, Dr. Koff spent a year as a hospital-based Gastroenterologist at Sibley Memorial Hospital where he remains active on the Emergency Room Committee and the Internal Medicine Peer Review Committee. He entered private practice in 2009, eventually joining Capital Digestive Care in 2012.