Aribert Ferdinand Heim (born 28 June 1914 – allegedly died 10 August 1992) was a former Austrian doctor, also known as Dr. Death. As an SS doctor in a Nazi concentration camp in Mauthausen, he is accused of killing and torturing many inmates by various methods, such as direct injections of toxic compounds into the hearts of his victims. He is alleged to have lived for many years in Cairo, Egypt under the alias of Tarek Farid Hussein and reportedly died there on August 10, 1992 of rectal cancer. His grave and body have not been found.

Heim was born in Bad Radkersburg, Austria-Hungary. He was the son of a policeman and a housewife. He studied medicine in Graz, receiving his doctorate in Vienna, joining the SS after the Anschluss. He volunteered for the Waffen-SS in the spring of 1940, rising to the rank of Hauptsturmführer.

In October 1941, Heim was sent into the Mauthausen-Gusen concentration camp, where he performed medical experiments on prisoners. He was later sent to an SS field hospital in Vienna.