Dr. Umair M. Nasir

Bo Shen, MD, is one of the world’s pre-eminent leaders in interventional inflammatory bowel disease (IBD) and pouch-related disorders due to his specialized expertise and experience treating a wide range of these conditions. Dr. Shen is the director of the IBD Center at Columbia and co-director of Columbia’s Global Center for Integrated Colorectal Surgery and IBD Interventional Endoscopy. He is also the Vice Chair for Innovation in Medicine and Surgery and a Professor of Medicine (in Surgery) and Edelman-Jarislowsky Professor in Surgical Sciences.In addition to pouchitis and pouch diseases, Dr. Shen specializes in critical diagnostic evaluation, and medical and endoscopic management of IBD, GI endoscopy and imaging technology. Dr. Shen is known as a pioneer in interventional endoscopic therapy for IBD and ileal pouch disorders - this includes postponing or eliminating the need for surgery in some cases.Dr. Shen comes to Columbia/NewYork-Presbyterian from the Cleveland Clinic, where he served as medical director for the Center of Inflammatory Bowel Diseases and the Ed and Joey Story Endowed Chair, Digestive Disease and Surgery Institute. While there, Dr. Shen established a subspecialty Pouchitis Clinic and Interventional IBD Unite - the first and largest of its kind in the United States. He also created an IBD Board, modeled after oncology tumor boards, to help manage the most challenging cases with multiple specialists.A prolific researcher in the field with more than 600 peer-reviewed articles, Dr. Shen is funded by a number of government and philanthropic organizations, including the NIH, the American Gastroenterological Association, American College of Gastroenterology, the Broad Foundation, and the Crohn’s and Colitis Foundation of America. Dr. Shen is highly rated in 34 conditions, according to our data. His clinical expertise encompasses Crohn's Disease, Viral Gastroenteritis, Colitis, Ileostomy, and Endoscopy. Dr. Shen is currently accepting new patients.

David Katzka is a Gastroenterologist practicing medicine in New York, New York. Dr. Katzka is highly rated in 18 conditions, according to our data. His clinical expertise encompasses Esophagitis, Eosinophilic Esophagitis, Barrett Esophagus, Endoscopy, and Gastrectomy.

Thomas Schiano is a Gastroenterologist practicing medicine in New York, New York. Dr. Schiano is highly rated in 31 conditions, according to our data. His clinical expertise encompasses Hepatitis, Hepatitis C, Autoimmune Hepatitis, Liver Transplant, and Splenectomy.