John C. McGinley is a prolific performer of stage and screen. After receiving his MFA from NYU's Tisch School of the Arts, McGinley was immediately cast as an understudy in John Patrick Shanley's Danny and the Deep Blue Sea, and appeared in a production of The Ballad of Soapy Smith. The following year he made his Broadway debut opposite John Lithgow and George Segal in a revival of Requiem for a Heavyweight. McGinley's feature film debut came in Alan Alda's Sweet Liberty. He has gone on to appear in a slew of feature films, including Platoon, Wall Street, Office Space, Point Break, Car 54, Where Are You? and Talk Radio, reprising his off-Broadway role as Eric Bogosian's friend and engineer.
McGinley has appeared on at least 20 different TV shows, ranging from animation and live action to comedy and drama. Despite the fact that he had to audition for his role on Scrubs five times, he was eventually cast as the iconic Dr. Perry Cox.
Dr. Cox is an attending physician and residency director at Sacred Heart Hospital. He's the sarcastic, bitter mentor of J.D. Dorian a role he clearly relishes. Cox believes his rough treatment of J.D. is good conditioning for the challenges of hospital life. He has a slew of negative nicknames for his hospital staffers; however, he deftly avoids teasing Nurse Carla Espinosa.
Dr. Cox also has a bit of a drinking problem and this becomes more of an issue when situations arise at the hospital. He has a complex relationship with his ex-wife Jordan, with whom he has two children. Despite their history, the two maintain a somewhat functional relationship.
He frequently clashes with hospital chief Dr. Bob Kelso, whom he occasionally refers to as "The Devil." After Kelso retires, Dr. Cox becomes chief.