Stephan Kurt Westmann (23 July 1893 – 7 October 1964) was a German soldier and physician. In the First World War, Westmann served in the German infantry on the Western and Eastern fronts and then as an Air Force surgeon, although unqualified. Completing his medical studies, he became a professor at the University of Berlin, and in the 1930s migrated to England and became a doctor in Harley Street, Westminster. During the Second World War, he was a British medical officer in Scotland, so that in the two World Wars he served on different sides.