Ladd elbowed the Canadiens' Matt D'Agostini in the head as he carried the puck out of his zone 3:48 into a 3-2 Hawks' victory on Friday night.
Ladd was assessed a five-minute major penalty that included a game misconduct because of the hit to the head. Ladd was kicked out of the game, will be fined $200 and is subject to further penalties by the commissioner's office.
D'Agostini left the game and did not return.
Already playing without Jonathan Toews, the Hawks had 10 true forwards in the game.