Dr Gottlieb went to Johns Hopkins University and Temple Medical School, and had Medical Residency and Gastroenterology Fellowship at University of Pittsburgh. He was Assistant Professor of Medicine at the University of Pittsburgh, where he did basic and clinical research for five years. He went into private practice in Cleveland, Ohio, where he was in a large group practice for 19 years. He moved his practice to Tucson, Arizona, in 2004. He is associated with Desert Sun Gastroenterology and Carondelet St Joseph's Hospital where he has served as Chairperson of the Gastroenterology Division. His interests include Irritable Bowel Syndrome (IBS), Inflammatory Bowel Disease (IBD), Gastroesophageal Reflux (GERD) and Diseases of the Liver.