Patrick Sarsfield Madigan (February 14, 1887 – May 8, 1944) was an American military officer in the United States Army who served as Assistant to the Surgeon General from 1940 to 1943.

Both of his brothers were in the Army Medical Corps, one of them retiring as a Colonel and another resigning to practice in a non-military setting.

[2] In August 1917, Madigan became an officer in the United States Army's 64th Infantry Regiment and was deployed to France in World War I.

At the end of the war, he became a neurophysicist in Norfolk, Virginia and later returned to Washington, D.C. to take a job at Walter Reed General Hospital.

[1] In 1926, Madigan became Chief of Neuropsychiatry at Sternberg General Hospital in the Philippine Islands and then returned to Walter Reed to take the same position there.