Leo Treyzon, MD is an attending physician and previously Clinical Chief of the Division Gastroenterology at Cedars-Sinai Medical Center. He specializes in treating patients with IBS, Crohn's disease (IBD), GERD ulcers , gastritis H Pylori small intestinal bacterial overgrowth(SIBO) cancer s o f th e digestive tract .TREXON IS ONE OF THE BEST AND HEALING DOCTORS EVER!!!!