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Leonard Weinstock, M.D.

Board Certified Gastroenterologist located in St. Louis, MO


Curriculum Vitae

About Dr. Weinstock

Board certified in internal medicine and gastroenterology, Leonard Weinstock, MD, provides compassionate care to patients at Specialists in Gastroenterology in St. Louis, Missouri. 

Dr. Weinstock was born and raised in New York and moved to St. Louis in 1985. He received his medical training in Rochester, New York, and completed his gastroenterology fellowship at Washington University in St. Louis. 

He has a clinical teaching appointment as an Associate Professor of Clinical Medicine and Surgery at the Washington University School of Medicine. Dr. Weinstock’s lectures and research on diseases of the esophagus, stomach, small intestine, and colon have been presented at national and international conferences. He is actively researching the connection of the gut and small intestinal bacterial overgrowth (SIBO) with several medical problems, including restless legs syndrome and chronic pelvic pain syndromes. He presented several lectures in Oregon at the first SIBO symposium and in France at the international rosacea study group.

Dr. Weinstock provides individualized care to all adult patients with gastrointestinal disorders. His clinical practice emphasizes colon cancer screening, therapeutic videoendoscopy, motility disorders, management of irritable bowel syndrome, and comprehensive management of inflammatory bowel disease. His experience in treating IBS patients who have SIBO dates back to 2000. He has expertise in the use of low-dose naltrexone, which is one of the few modalities that promote the reduction of inflammation by increasing endorphins.

Dr. Weinstock is married and has twin daughters.

Blue Cross Blue Shield
United Healthcare