Gerhardt Katsch (14 May 1887 – 7 March 1961) was a German internist. Between 1928 and 1957 he served as Professor of Internal medicine at the University of Greifswald. It was on the initiative of Katsch that in 1930 a residential facility providing clinical and socio-medical care for Diabetic patients was established at Garz on the Island of Rügen. It was the first institution of its kind in Germany. Gerhardt Katsch is widely regarded – alongside Oskar Minkowski and Karl Stolte – as one of the three principal pioneers of modern diabetes management in Germany.