Howard missed his fourth straight game with a back injury Sunday against the Cavaliers. He was diagnosed with a herniated disk last week. Howard will rest the injury for 10 days and will then be re-evaluated.
Van Gundy said before Sunday's game that he would consider it a bonus if Howard or forward Hedo Turkoglu, who is sidelined with a facial fracture, return at some point this season.
Howard joined his teammates in Cleveland, but a team spokesman said he would remain at the Magic's hotel during the game. He will accompany the team back to Orlando, where the Magic host Philadelphia on Friday.
Orlando took another injury hit in the first quarter Sunday when Glen Davis, who had played well at center with Howard sidelined, suffered a sprained right knee and didn't return. He will undergo a further examination Monday before the Magic's home game with Philadelphia.
"He hyperextended his knee, so my guess would be that he'd not play," Van Gundy said. "I haven't been told anything officially, though."
Davis was injured when he went up for a shot and came down awkwardly on his right leg. He crumpled to the floor and was down for a couple of minutes. He walked with a noticeable limp to the locker room.
Orlando clinched a playoff spot with Sunday's win
Information from The Associated Press was used in this report..