Noah missed Wednesday's game against the Minnesota Timberwolves with a swollen right ankle.
"[It's] a little bit better," Noah said Friday before the game. "I got a little of the swelling down. ... It's still really blue, so I guess that's a good thing. The swelling's out. Not all the way, but it's healing."
He suffered the injury Monday night against the Philadelphia 76ers.
Bulls coach Tom Thibodeau said Friday morning that Noah would be a game-time decision.
"I don't know what he'll be able to do," Thibodeau said. "He just got treatment [Thursday]. We'll see if he can get anything done [in shootaround]. It will be the same thing [as Wednesday].
Kurt Thomas started in Noah's place.
Nick Friedell covers the Bulls for ESPNChicago.com and ESPN 1000.