Alert: Phone Scam Warning. Learn More

Harry Sarles, M.D.

Vice President / Principal Investigator

DHAT Default icon

Request An Appointment

If you are experiencing a medical emergency, please call 9-1-1.

To schedule an appointment, please call 972-771-2222 or click the “Message Us” button located at the bottom right corner of your screen and a member of our team will contact you within 48 hours.

Dr. Sarles is a board certified gastroenterologist with extensive advanced experience in the field of gastroenterology and hepatology. He is currently the medical director and principal investigator for digestive health research Institute. He is directing trials in multiple fields of gastroenterology including inflammatory bowel disease, (Crohn’s disease, ulcerative colitis), gastroparesis, irritable bowel syndrome, eosinophilic esophagitis, nonalcoholic steatohepatitis. Dr. Sarles personal interests are in inflammatory bowel disease (IBD), colon cancer prevention and early detection, and esophageal problems. He has extensive training and experience in all endoscopic procedures. He also offers a nonsurgical hemorrhoidal banding procedure in office to eliminate symptomatic hemorrhoids.

In addition to his clinical duties, Dr. Sarles has served as the past president of the American College of Gastroenterology and the Texas Society for Gastroenterology and Endoscopy.

Education

  • Fellowship: Gastroenterology, V.A. Hospital, Phoenix, AZ
  • Residency: Internal Medicine, University of Texas Medical Branch, Galveston, TX
  • Medical School:
  • University of Texas Medical Branch, Galveston, TX
  • Undergrad: University of Texas, Austin, TX

Professional Certifications

  • Board Certifications: Internal Medicine and Gastroenterology
  • Professional Affiliations
  • American Gastroenterological Association

Facility Affiliations

  • Texas Health Presbyterian, Rockwall
  • Preston Crossing Endoscopy Center

Alert: Phone Scam Warning

We’re seeing an increase in phone scams targeting patients. Callers may pose as Medicare, your doctor’s office, or another healthcare provider to obtain your Medicare number or other personal information.

Please remember:

  • Never share your Medicare number, Social Security number, or banking information with unsolicited callers.
  • Medicare will never call you unexpectedly to request your number or personal details.
  • Be wary of offers for “free” medical equipment or services in exchange for your Medicare information.
  • If a call seems suspicious, hang up and contact the clinic where you receive care directly using the phone number listed on our website for that location.

To report a suspicious call: Call 1-800-MEDICARE (1-800-633-4227) or visit reportfraud.ftc.gov.

Request An Appointment