 He was appointed Regius Professor of Physic at Oxford in 1698.Thomas Hearne, whose opinion of low church whig is not likely to be impartial, says that he owed his appointment to the influence of Dr. Gibbons with Lord Somers, and that he scandalously neglected the duties of his office.According to Anthony Wood he practised as a physician 'in and near the antient Borough of Warwick,' but in 1698 John Evelyn, writing from Wotton, speaks of Dr. Hoy as "a very learned, curious, and ingenious person, and our neighbour in Surrey."