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Office Locations:

Baptist Office
Phone:  (405) 702-1300
Fax:  (405) 702-1280

Edmond Office
Phone:  (405) 471-6690
Fax:  (405) 604-3401

Procedures performed at:
DDSI North Ambulatory Endoscopy Center
Integris Health Edmond

Clinton G. Wallis, M.D.

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, the American Society of Gastroenterological Endoscopy, American Gastroenterology Association, Arkansas-Oklahoma Endoscopy Society and the Oklahoma State Medical Association.

Dr. Wallis offers the patented CRH-O’Regan Disposable Hemorrhoid Banding System in his practice. This procedure treats internal hemorrhoids and can be done in his office, without surgery or pain. Please visit www.crhcenter.com for more information.

Dr. Wallis’ Prep Information

Dr. Wallis would like to thank you for allowing him to participate in your medical care. If you have been scheduled for an upcoming procedure, Dr. Wallis’ medical staff will direct you to the appropriate procedure information below.

1. Please review the Endoscopic Prep Information and Appointment Cancellation Policy prior to your procedure.

2. Dr. Wallis’ medical staff will direct you to the appropriate procedure preparation below. Please download and print the information so that you can fill in your appointment date and time. Don’t hesitate to call our office at 405-702-1300 if you have any questions.

  • EGD

  • ERCP

  • Flexible Sigmoidoscopy

  • Colonoscopy-Miralax Prep

  • Colonoscopy-Prepopik

  • Colonoscopy-TriLyte Prep