Halak, who established the team record and a career-best for wins this season, is listed as day-to-day, the Islanders say. He didn't make the trip to Chicago for Tuesday night's game.
Halak is 34-15-1 with a 2.46 goals-against average in 50 games this season.
Neuvirth, acquired by New York from Buffalo on March 2, played in his fourth game with the Islanders and second straight. He made 27 saves in the Islanders' 3-1 home loss to Montreal on Saturday night.