Abstract:Perrott directed the National Health Survey (1935-1936) which provided estimates and projections of U.S. disability and illness on a national scale. He served three Surgeons General as Chief of the Division of Public Health Method. After retirement, Perrott organized an international conference on health studies for the NIH. His work after becoming director of research and statistics for the Group Health Association of America in 1962 provided support for the Health Maintenance Organization Act of 1973.