William Carpentier (born 1935/1936, Edmonton, Alberta) is a Canadian-American physician best known as the flight surgeon assigned to the United States' Apollo 11 mission, the first manned spacecraft to land on the Moon. Carpentier says that this was the highlight of his career. In the months following the Apollo 11 mission, Carpentier became known as a world famous physician. He later went into nuclear medicine research. Carpentier is a recipient of the Presidential Medal of Freedom, with which he was decorated for his role in the Apollo 13 mission.