He didn't skate with the Islanders on Thursday morning and is listed as day-to-day. Mike Dunham got the start, while Wade Dubielewicz -- recalled Wednesday from Bridgeport of the AHL -- served as the backup.
DiPietro was struck on the head by Begin's leg after the goalie chased down a loose puck at the Islanders blue line to prevent a breakaway in New York's 5-3 loss to the Canadiens.
Dunham made his first start since Feb. 1, when he stopped 30 shots in a 5-2 win in Atlanta. Dunham played in only five previous games since Dec. 15, including Tuesday, when he made 27 saves after replacing DiPietro.
DiPietro, the first goalie ever chosen No. 1 in the NHL draft, is enjoying his finest season. After signing a landmark, 15-year contract with the Islanders in September, DiPietro has hit the 30-win mark for the second straight season with a 2.59 goals-against average.