Dr. O’Connor attended Northwestern University Medical School in Chicago, Illinois where he received a Doctor of Medicine. After medical school, he completed his post graduate training at the University of Iowa Hospitals and Clinics in Iowa City, Iowa. He finished his medical training with a fellowship at the same facility. He is a member of the American College of Gastroenterology, the American Gastroenterology Association, the American Society of Gastrointestinal Endoscopy, the American College of Physicians, the Illinois State Medical Society, and the Kankakee Medical Society. Dr. O’Connor is board certified in gastroenterology.