Dr. Clark Antonson has been in practice since 1985. Dr. Antonson is a graduate of the University of Nebraska College of Medicine in Omaha. He completed his Residency at the University of Nebraska College of Medicine and his Fellowship at Kansas University Medical Center. He served as Assistant Professor at the University of Kansas Hospital and Kansas City Veteran’s Hospital. Dr. Antonson is Board Certified in Gastroenterology by the American Board of Internal Medicine. Dr. Antonson is a fellow in the ACG and past president of the Nebraska Gut Club. He is presently Governor of the ACG for the state of Nebraska.