Reynell Coates (December 10, 1802 in Philadelphia, Pennsylvania – April 27, 1886 in Camden, New Jersey) was an American physician, scientist, teacher, and poet. Reynell Coates was born in Philadelphia, Pennsylvania, the youngest son of philanthropist Samuel (1748–1830) and Amy (née Hornor) Coates, and grandson of Samuel and Mary (Langdale) Coates. At an early age, he became proficient in mathematics and languages, and studied medicine and surgery at Pennsylvania Hospital, where at age fifteen he became an apprentice of Dr. Benjamin Rush. He was graduated from the medical department of the University of Pennsylvania in 1823 with a thesis on "Fractures of Inferior Extremities", and became resident physician at the hospital. The same year he voyaged to India as a ship's surgeon and made an ex