David Herzog (born October 18, 1946, Newark, New Jersey, United States) is an American expert on eating disorders research and treatment. He was one of the first doctors to advocate that treatments for bulimia, anorexia and other eating disorders include both psychotherapy and medical and nutritional monitoring, as well as careful follow up after patients recover. Today he is a researcher, teacher and advocate. Much of his work has focused on changing the way the fashion industry uses models.