There is a message at the end of the credits warning viewers to not be distracted when driving. This is a reference to Dr Strange's catastrophic car accident, but it is also a running gag in the film about essential warnings appearing after (not before) instructions.
SPOILER: There is a scene at the end of the closing credits: Baron Mordo meets Pangborn and takes away his healing magic.
A new Marvel logo appears with this film: comic-book pages, scripts and MCU film stills/scenes form the Marvel logo in a three-dimensional manner.
SPOILER: There is a scene in the closing credits: Dr Strange meets Thor and offers to help him locate his father. This was a contracted version of the same scene from Thor: Ragnarok (2017).
There is a statement at the end of the closing credits: "Doctor Strange will return".
Part of the closing credits appears in a sequence of shifting mandalas.