Doctor X

Doctor X may refer to:


 * Doctor X (film), a 1932 Technicolor film starring Lee Tracy, Fay Wray and Lionel Atwill
 * Alan E. Nourse, who used "Doctor X" as the pseudonym of his 1965 journal Intern
 * Doctor X (wrestler), ring name of Mexican professional wrestler Clemente Valencia
 * "Doctor X", a ring name of professional wrestler Dick Beyer
 * "Doctor X", a ring name of professional wrestler Tom Prichard
 * Dr. X (Action Man), the arch-enemy of the 1993–2006 Action Man revival toy line
 * Dr. X, a pseudonym for Doctor Mario Jascalevich, accused of several patient murders
 * Dr. X, the primary antagonist of the Queensryche albums Operation: Mindcrime and Operation: Mindcrime 2
 * Dr. X, a mysterious illicit nanotechnology specialist from Neal Stephenson's novel The Diamond Age
 * Doctor-X (TV series), a Japanese medical drama
 * Ted Mosby, How I Met Your Mother character whose aliases include Doctor X