Dr. Sigal is an Assistant Professor of Medicine at Weill Medical College of Cornell University, Adjunct Assistant Professor of Clinical Medicine at Columbia University, Attending Physician, Center for Liver Disease and Transplantation, NewYork-Presbyterian Hospital/Weill Cornell Medical Center, and Attending Physician, NewYork-Presbyterian Hospital/Columbia University Medical Center.

Dr. Sigal graduated from Indiana University with Honors in 1979 and obtained his M.D. degree at the University of Chicago Pritzker School of Medicine. He completed residencies in Pathology at the University of Pennsylvania and Internal Medicine at St. Luke's Hospital in New York and fellowships in Gastroenterology at the Albert Einstein College of Medicine and Liver Diseases at Mount Sinai Medical Center. He was a member of the Recanati/Miller Transplantation at the Mount Sinai Medical Center from 1998 until 2004, when he joined the Center for Liver Disease and Transplantation of the NewYork-Presbyterian Medical Center as Associate Medical Director.

Dr. Sigal is board-certified in Internal Medicine and in Gastroenterology and UNOS certified in Transplant Hepatology. His clinical interests include treatment of patients with cirrhosis from chronic hepatitis C, alcoholic liver disease, and complications of cirrhosis.