Maurice S. Haddad, M.D., F.A.C.G. is a board certified specialist in gastroenterology. He completed his post-doctoral fellowship at St. Louis University Hospitals in St Louis, Mo., in 1987 and opened his practice, Gastroenterology Diagnostic Clinic, P.A., in Pasadena in 1988. He has been a member of the American College of Gastroenterology since April 1991 and has been a Fellow of the American College of Gastroenterology since 2006.