Gastroenterologist at Houston Methodist Hospital. Dr. Schiesser's clinical interests include abdominal pain, anemia, blood in stool, constipation, colonoscopy, colorectal cancer screening, diarrhea, dysphagia, esophagogastroduodenoscopy (EGD or upper endoscopy), gastritis and peptic ulcer disease, gastroesophageal reflux disease (GERD), heartburn, inflammatory bowel disease (Crohn’s disease and ulcerative colitis), irritable bowel syndrome (IBS), positive Cologuard, and rectal bleeding.