Sidney Garfield, American physician, co-founded Kaiser Permanente (died 1984)

Sidney R. Garfield was an American physician and a pioneer of health maintenance organizations. He co-founded the Kaiser Permanente healthcare system with businessman Henry J. Kaiser. He graduated from the University of Iowa College of Medicine in 1928, which is now called the Roy J. and Lucille A. Carver College of Medicine.

Kaiser Permanente is an American integrated managed care consortium headquartered in Oakland, California. Founded in 1945 by industrialist Henry J. Kaiser and physician Sidney R. Garfield, the organization was initially established to provide medical services at Kaiser's shipyards, steel mills and other facilities, before being opened to the general public. Kaiser Permanente operates as a consortium comprising three distinct but interdependent entities: the Kaiser Foundation Health Plan (KFHP) and its regional subsidiaries, Kaiser Foundation Hospitals, and the regional Permanente Medical Groups. As of 2024, Kaiser Permanente serves eight states as well as the District of Columbia and is the largest managed care organization in the United States.