Dr. Oleg Katcher is board certified in Gstroenterology and Clinical Nutrition. He has more than 16 years of experience treating patients with various gastrointestinal problems. Dr. Katcher underwent rigorous training at some of the best medical centers in the United States: Mount Sinai Hospital, Cornell Medical Center and Memorial Sloan-Kettering Cancer Center. He worked with the best experts in the field of gastroenterology and endoscopy. Dr. Katcher has particular expertise and interest in screening for gastrointestinal cancers, and treating such GI disorders as hemorrhoids, IBS, GERD, gastroparesis, constipation, incontinence, and liver disease. He is fluent in Russian, and speaks conversational Spanish. Dr. Katcher is affiliated with New York Presbyterian Brooklyn Methodist Hospital.