Granger took an inadvertent elbow to his upper right cheek in the final minute of Tuesday's game against Charlotte. The team says Granger was checked out at Methodist Hospital.
He was expected to miss Wednesday's game against the Cleveland Cavaliers.
"It seems like he's going to be all right," Pacers coach Jim O'Brien said before the game. "Hopefully, he'll be back in the lineup quickly. You never know when someone got hit that hard in the head area, you always have to be concerned."
The Pacers said team doctors will continue to evaluate Granger, a 2009 NBA All-Star who leads the team in scoring at 23.1 points a game.
"We'll go day to day see how he does," O'Brien said.
Dahntay Jones was slated to start in Granger's spot.