2016 FINA World Swimming Championships (25 m) – Men's 400 metre individual medley

The Men's 400 metre individual medley competition of the 2016 FINA World Swimming Championships (25 m) was held on 10 December 2016.

Records
Prior to the competition, the existing world and championship records were as follows.

Heats
The heats were held at 10:04.

Final
The final was held at 19:50.