The fourth season of Chicago Med, an American medical drama television series with executive producer Dick Wolf, and producers Michael Brandt, Peter Jankowski, Andrew Schneider and René Balcer (uncredited), was ordered on May 9, 2018. The season premiered on September 26, 2018, with a time slot change from Tuesday at 10:00 PM to Wednesday at 8:00 PM. The season concludes on May 22, 2019, and contained 22 episodes.