Douglas Kliewer, M.D.



4200 E. Skelly Drive Suite 700

Tulsa, OK 74135

Open today 8 AM - 4:30PM

Quick Facts

  • Virtual Telemedicine Visits Available, Call For Details
  • Board Certified Gastroenterologist
  • Currently Accepting New Patients
  • Most Insurance Plans Accepted
  • Performs Colonoscopies

Adult Gastroenterology Associates - Tulsa, OK

Gastroenterology in Tulsa, OK

Adult Gastroenterology Associates - Tulsa, OK

4200 E. Skelly Drive

Suite 700

Tulsa, OK 74135

Open today 8 AM - 4:30PM

Request an Appointment

If you are experiencing a medical emergency, please call 9-1-1. This form is intended for non-urgent appointment requests only. Non-emergency requests will be responded to within 24-48 hours.

About Douglas Kliewer, M.D.

Douglas Kliewer, MD chose a career in medicine because he truly appreciates the opportunity to care for others and engage in scientific research and study to help solve his patients’ medical concerns. When choosing a subspecialty, gastroenterology seemed like a natural choice. Dr. Kliewer recalls, “There was always something to do and the advancements in the field were so groundbreaking and impactful.”

Dr. Kliewer graduated from Oklahoma State University with an undergraduate degree in Physiology, and attended medical school at the University of Oklahoma College of Medicine, graduating with Outstanding Distinction. He completed his internship and residency in Internal Medicine at the University of Texas Southwestern Medical Center in Dallas, then moved on to complete two fellowships at UT Southwestern: one in Gastroenterology and Hepatology and one in Advanced Therapeutic Endoscopy.

Dr. Kliewer’s specific area of interest in the GI field is in the treatment of Inflammatory Bowel Disease (IBD). As a physician of Adult Gastroenterology Associates (AGA), Dr. Kliewer is proud to be a part of a group that upholds high-quality standards of care for each patient. Every physician strives to be available to their patients, colleagues, and the community the facility serves.

Over his last 20 years with Adult Gastroenterology Associates, Dr. Kliewer has seen tremendous advancements in the treatment of IBD, including new medications to treat the root cause and manage symptoms. New technology has also emerged, such as video capsule cameras that can travel farther along the GI tract than was ever previously possible. EMR (Endoscopic Mucosal Resection) has also been a groundbreaking procedure, allowing gastroenterologists to remove areas of diseased tissue four to five times larger than a typical biopsy. This eliminates the need for traditional surgery and is much safer for the patient.

Outside of work, Dr. Kliewer enjoys photography, travel, and activities at his church.

Awards and Accreditation:

  • Bachelor of Science in Physiology: Oklahoma State University – Stillwater, OK
  • Doctor of Medicine: University of Oklahoma College of Medicine – Oklahoma City, OK
  • Internship and Residency in Internal Medicine: University of Texas Southwestern Medical Center – Dallas, TX
  • Fellowship in Gastroenterology and Hepatology: University of Texas Southwestern Medical Center – Dallas, TX
  • Fellowship in Advanced Therapeutic Endoscopy: University of Texas Southwestern Medical Center – Dallas, TX
  • Coburn Medical Scholarship recipient while at the University of Oklahoma
  • Phi Kappa Honor Society (top 10% of his class) at Oklahoma State University
  • Alpha Omega Alpha Medical Honor Society
  • American Gastroenterological Association
  • American College of Gastroenterology
  • American Society for Gastrointestinal Endoscopy
  • Christian Medical and Dental Society


Great experience 👍.

D.W. Google

Dr. Kliewer has been my doctor for many years. He is knoweledgeable, competent, kind, patient and truly cares about his patients health. I highly recommend him. He saved my life.

K.M. Google

Very professional, nice bedside manner, great staff, good communication.

K.S. Google

He is a great doc. I would recommend him to any one

P.H. Google

Went in for a colonoscopy Dr. and staff very attentive and kind. Waiting for results.

R.L. Google


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