WARREN, JOHN. (1753–1815). Continental surgeon. Massachusetts. After studying under his elder brother, Joseph Warren, John became a successful doctor in Boston. In 1773 he joined Colonel Timothy Pickering's regiment as a surgeon, and on hearing of his brother Joseph's death at Bunker Hill, he volunteered for service in the ranks. At the age of just twenty-two, however, he became senior surgeon of the hospital at Cambridge. In 1776 he was transferred to New York and was appointed surgeon of the general hospital on Long Island. After serving with Washington's army at Trenton and Princeton, he returned to Boston in April 1777 to resume his medical practice while performing the duties of a military surgeon in the army hospital there. He became one of the leading New England surgeons of his day, performed one of the first abdominal operations in America, and was a founder of the Harvard Medical School.
SEE ALSO Warren, Joseph.
revised by Harold E. Selesky