Gregory L. Shannon, MD Board-Certified Gastroenterologist
Medical Training
- Baylor College of Medicine in Houston, Texas
- Northwestern University Medical School
- Xavier University of Louisiana
Professional Affiliations
- American Gastroenterological Association
- American College of Gastroenterology
- American Society for Gastrointestinal Endoscopy
- Crohn's & Colitis Foundation of America
- Baylor College of Medicine, Clinical Instructor
Hospital Affiliations
- Memorial Hermann Sugar Land Hospital
- Memorial Hermann Southwest Hospital
- St. Luke’s Episcopal Hospital
- The Methodist Hospital, Sugar Land, TX
Gregory L. Shannon, MD, is a board-certified gastroenterologist providing comprehensive care for adults with conditions affecting the digestive system. Practicing in Sugar Land, Texas, he evaluates and treats a broad range of gastrointestinal concerns involving the esophagus, stomach, intestines, colon, liver, biliary system, and pancreas. With over 30 years of experience in gastroenterology, Dr. Shannon brings extensive clinical experience to the evaluation and management of both common digestive problems and chronic gastrointestinal conditions.
Dr. Shannon earned his medical degree from Northwestern University Feinberg School of Medicine in 1996. He completed his Internal Medicine residency at Baylor College of Medicine from 1996 to 1999, followed by fellowship training in Gastroenterology at Baylor College of Medicine from 1999 to 2002. He is board certified in Gastroenterology by the American Board of Internal Medicine.
His clinical interests include colon cancer prevention, colon polyps, Crohn’s disease, and ulcerative colitis. His practice also encompasses conditions such as gastroesophageal reflux disease, diverticular disease, hemorrhoids, esophagitis, gastrointestinal bleeding, peptic ulcers, and other disorders affecting the digestive tract. These conditions may present with symptoms ranging from abdominal discomfort and changes in bowel habits to reflux, bleeding, or difficulty swallowing, making careful evaluation an important part of determining appropriate care.
Dr. Shannon provides diagnostic and endoscopic care when appropriate with procedures including colonoscopy, lower gastrointestinal endoscopy, upper gastrointestinal endoscopy, flexible sigmoidoscopy, and esophageal dilation, among other diagnostic procedures. Colonoscopy plays an important role in colorectal cancer screening and the evaluation and management of colon polyps, while upper endoscopy can help investigate conditions affecting the esophagus, stomach, and upper digestive tract.
In addition to his clinical practice, Dr. Shannon participates in clinical research and is a Principal Investigator in Gastroenterology with R&H Clinical Research. He practices through Gastroenterology Associates of Texas and is affiliated with Memorial Hermann Sugar Land Hospital. His approach to care emphasizes listening to patients, understanding their concerns, explaining findings clearly, and developing an appropriate plan based on their individual clinical needs.
FAQs
What gastroenterology procedures does Dr. Shannon perform?
Dr. Gregory L. Shannon, MD provides care for a range of gastrointestinal conditions through his Sugar Land practice. His clinical interests include conditions affecting the colon, colon polyps, colon cancer, Crohn's disease, and ulcerative colitis. Other gastrointestinal conditions associated with his care include acid reflux and GERD, hemorrhoids, diverticular disease, gastritis, gastrointestinal bleeding, and constipation.
If you are experiencing persistent digestive symptoms or have been referred for evaluation of a gastrointestinal condition, contact Gastroenterology Associates of Texas to discuss your care needs.
What gastroenterology procedures does Dr. Shannon perform?
Dr. Shannon performs gastroenterology procedures including colonoscopy, lower gastrointestinal endoscopy, and upper gastrointestinal endoscopy. Provider listings also identify procedures such as esophageal dilation, sigmoidoscopy, and upper gastrointestinal series among procedures associated with his practice.
Dr. Shannon performs gastroenterology procedures including colonoscopy, lower gastrointestinal endoscopy, and upper gastrointestinal endoscopy. Provider listings also identify procedures such as esophageal dilation, sigmoidoscopy, and upper gastrointestinal series among procedures associated with his practice.
What does Dr. Gregory L. Shannon specialize in?
Dr. Gregory L. Shannon, MD is an expert gastroenterologist specializing in the diagnosis and treatment of conditions affecting the digestive system. His clinical practice focuses on comprehensive digestive health, including the evaluation and treatment of conditions involving the esophagus, stomach, intestines, and colon.
Where does Dr. Gregory Shannon see patients?
Dr. Gregory L. Shannon, MD sees patients through Gastroenterology Associates of Texas in Sugar Land, Texas. His office is located at 17510 W Grand Pkwy South, Medical Plaza 1, Suite 220, Sugar Land, TX 77479. The office can be reached at
For current appointment availability, office hours, and location information, patients should contact Gastroenterology Associates of Texas directly
What is Dr. Gregory L. Shannon’s Background?
Born and raised on the South Side of Chicago to an Eritrean mother and Black father, Dr. Shannon brings a rich and diverse personal background to his medical practice, along with a deep connection to community-focused care.
Today, Dr. Shannon practices with Gastroenterology Associates of Texas in Sugar Land, Texas, where he serves as a gastroenterologist in Sugar Land and provides care to patients throughout Sugar Land and the greater Houston area.
