Daniel David Federman, (1928 – September 6, 2017) was an American endocrinologist and the Carl W. Walter Distinguished Professor of Medicine and the Dean for Medical Education at Harvard Medical School. He helped change medical education at through its New Pathway curriculum around the early 1990s, and his work helped create the field of genetic endocrinology. Federman also worked for over thirty years at Boston's Brigham and Women's Hospital, a Harvard teaching hospital in the Longwood Medical and Academic Area.