The surgery repaired a fracture of the third and fourth metacarpals in Bagley's right hand. He suffered the injury in Monday's 135-106 loss to Portland.
The Pistons acquired Bagley at the trade deadline last season and signed him to a three-year deal this summer. He's averaging 10.6 points and 5.9 rebounds this season, his fifth in the NBA.
A knee injury in preseason kept Bagley out for the first month of the season.