Noah Biggs was an English medical reformer and alchemical writer of the middle of the seventeenth century. In his Chymiatrophilos, mataeotechnia medicinae praxes: The Vanity of the Craft of Physick, from 1651, he attacked pretentious and quack medical theories of his time. He also implied that Galenists in the College of Physicians opposed the Parliamentarian regime. He is credited with introducing the words 'febrile' and 'obesity'.