Dr. Wallis is board certified in both Internal Medicine and Gastroenterology and has completed extensive training in the diagnosis and treatment of disorders of the esophagus, stomach, small intestine, colon, liver and gallbladder. He has been in private practice since 2006 with Digestive Disease Specialists, Inc.
Dr. Wallis was born in Stillwater, Oklahoma, and grew up in the Tulsa area. He earned his undergraduate degree from Oklahoma State University. Dr. Wallis completed an internship at the University Of Oklahoma Health Sciences Center and received his residency and clinical fellowship training at the University Of Missouri-Columbia School Of Medicine. He is a member of the American College of Gastroenterology; he's a member of the American Society of Gastroenterological Endoscopy, American Gastroenterology Association, Arkansas-Oklahoma Endoscopy Society and the Oklahoma State Medical Association.
Dr. Wallis is now offering the patented CRH-O’Regan Disposable Hemorrhoid Banding System in his practice. This procedure treats internal hemorrhoids causing painless rectal bleeding and can be done in his office, without surgery or pain. Please visit www.crhcenter.com for more information.
Northwest (Baptist Medical Center) Office
Schedule an Appointment
Dr. Wallis' Prep Page