Clinton G. Wallis, M.D. 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.
Clinton G. Wallis, M.D. 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.
The reviews listed below were collected independently of Oklahoma Sports Science and Orthopedics through rater8. Each review represents an authentic and verified patient experience.
Very knowledgeable and caring. Good doctor
(2 days ago)
Apr-2026
I have confidence in Dr Wallis and returned to him as needed.
(1 week ago)
Apr-2026
Very genuine.
A one of a kind Doctor.
10 out of 10
(2 weeks ago)
Apr-2026
Dr. Wallis is hands on and listen to you very carefully to get the best results for his patients.
(3 weeks ago)
Apr-2026
Takes his time, listens well, asks good questions and very knowledgeable.
(1 month ago)
Mar-2026
Excellent gastrologist who cares about his patience and makes plans to help them get better… he also has great staff working for him. Highly recommend.!
(2 months ago)
Feb-2026
I’ve referred Dr Wallis to my dentist. She is very good to mental store information to share with her clients.
(3 months ago)
Jan-2026
Explains everything
(3 months ago)
Jan-2026
Excellent doctor and friendly professional staff!
(4 months ago)
Dec-2025
Dr. Wallis is very informative and proactively treats my Gastro issues. He’s equally personable in the surgery room as he is in the office.
(4 months ago)
Dec-2025
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Gastro - Clinton Wallis
6516 N Olie Ave Oklahoma City, OK 73116
OSSO OSC - Clinton Wallis
3100/3115 SW 89th Oklahoma City, OK 73159
Clinton G. Wallis, M.D. 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 utilizing the 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.
See other doctors in Oklahoma Sports Science and Orthopedics
Very knowledgeable and caring. Good doctor
I have confidence in Dr Wallis and returned to him as needed.
Very genuine. A one of a kind Doctor. 10 out of 10
Dr. Wallis is hands on and listen to you very carefully to get the best results for his patients.
Takes his time, listens well, asks good questions and very knowledgeable.
Excellent gastrologist who cares about his patience and makes plans to help them get better… he also has great staff working for him. Highly recommend.!
I’ve referred Dr Wallis to my dentist. She is very good to mental store information to share with her clients.
Explains everything
Excellent doctor and friendly professional staff!
Dr. Wallis is very informative and proactively treats my Gastro issues. He’s equally personable in the surgery room as he is in the office.