Clinton G. Wallis, M.D.



Telephone: 405-486-6960

Fax: 405-486-6961


6516. N. Olie Ave, Suite A
Oklahoma City, OK 73116
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3110 SW 89th Street, Suite 104
Oklahoma City, OK 73159
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Clinton G. Wallis, M.D. will be joining OSSO in June of 2022. 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, the American Society of Gastroenterological Endoscopy, American Gastroenterology Association, Arkansas-Oklahoma Endoscopy Society and the Oklahoma State Medical Association.

Dr. Wallis is dual board-certified in both internal medicine and gastroenterology and has completed extensive training in the diagnosis and treatment involving disorders of the esophagus, stomach, small intestine, colon, liver, pancreas, gallbladder and anorectal pathology including hemorrhoids. 

Apart from the many endoscopic procedures performed to diagnose and treat those conditions outlined above, he is also trained in non-surgical treatment of hemorrhoids utilizing the CRH-O’Regan hemorrhoid Banding System.  This method is a unique and effective, non-surgical procedure that can be performed in the office with minimal discomfort or downtime. 



EGD, Esophagogastroduodenoscopy

Esophageal dilation

Esophageal Botox

PEG tube placement


Hemorrhoidal band ligation


Medical School
American University College of Medicine

University of Missouri-Columbia School of medicine

University of Oklahoma College of Medicine

University of Missouri-Columbia Division of Gastroenterology

Board Certifications
American Board of Internal Medicine-Internal Medicine
American Board of Internal Medicine-Gastroenterology
National Board of Physicians and Surgeons-Internal Medicine and Gastroenterology(pending)