Humayun Javaid Chaudhry, D.O., MACP, FRCP (Lon.) (born November 17, 1965) is an American physician and medical educator who is president and chief executive officer of the Federation of State Medical Boards (FSMB) of the United States, a national non-profit organization founded in 1912 that represents the 70 state medical boards of the United States and its territories and which co-sponsors the United States Medical Licensing Examination (USMLE). From 2007 to 2009, he served as Commissioner of Health Services for Suffolk County, New York, the state's most populous county outside New York City. In 2016, he was listed by Modern Healthcare magazine as one of the 50 Most Influential Physician Executives and Leaders.