Gary Hills, DO

Gary Hills, DO was practically born a doctor, a career in medicine is in his blood: his father, uncle, and brother are all doctors. Growing up, he watched his father develop close relationships with his patients, making house calls to care for the sick, deliver babies, and assist in surgeries. Today, his son is a physician as well.

His specific areas of interest in the GI field include Barrett’s esophagus, colon cancer prevention and liver/biliary diseases. He studied hepatology, or the treatment of liver/biliary diseases, in London, where he trained under Dame Sheila Sherlock, who was known as the world’s foremost liver doctor.

As a physician of Adult Gastroenterology Associates (AGA), Dr. Hills belongs to a group of physicians dedicated to unparalleled quality in patient care. He says, “Every doctor here is a brilliant diagnostician, and it’s one of the most profound practices in the city, if not the state.” All of the physicians of AGA maintain the highest standards in GI care and strive to stay current with the latest technology.

Over his career in gastroenterology, the development of a cure for hepatitis C has made the most significant impact on his practice. Previously, hepatitis C patients had to spend a year taking a treatment that made patients sick and was minimally effective. Now, for virtually every genotype, there are a number of successful treatment options. He also notes colon cancer prevention and detection as important modalities. In the past, people weren’t diagnosed with colon cancer until they were in the late stages of the disease. The advent of screening colonoscopies allows physicians the opportunity to diagnose colon cancer in the early stages, and deliver more successful treatment plans.

In his spare time, he enjoys studying World War II history and reading biographies of Winston Churchill. He also studies Civil War history, including Abraham Lincoln’s biographies. Dr. Hills also finds time for gourmet cooking, especially Indian cuisine, growing roses in his garden, and traveling with his wife, children, and grandchildren.

My favorite part of practicing medicine is when I see my patients healed. It’s very rewarding!– Gary Hills, DO Adult Gastroenterology Associates, Tulsa, OK

Education, Memberships, Awards, and Affiliations

  • Bachelor of Science in Biology and Chemistry: Central Michigan University – Mount Pleasant, MI
  • Doctor of Osteopathy: Michigan State University College of Osteopathic Medicine – East Lansing, MI
  • Internship and Residency in Internal Medicine: Flint Osteopathic Hospital – Flint, MI (now Genesys Ascension Medical Center)
  • Fellowship in Gastroenterology & Hepatology: Botsford General Hospital – Farmington Hills, MI (now Beaumont Hospital, Farmington Hill)
  • Additional Hepatology Studies: Royal Free Hospital – London, England – studied under Dame Sheila Sherlock and Professor Peter Scheuer, Britain’s leading liver pathologists
  • Gastrointestinal Applications of Laser: Sinai Hospital – Detroit, MI
  • Oklahoma Osteopathic Association
  • American Osteopathic Association
  • Arkansas-Oklahoma Endoscopic Society
  • Sigma Sigma Phi Osteopathic Honor Society
  • Board certified in Gastroenterology


  • Gastroenterology
  • Internal Medicine



Practicing medicine since 1984



Adult Gastroenterology Associates


Tulsa Endoscopy Center

4200 Skelley Dr., Suite 100
Tulsa, Oklahoma 74135

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