X-rays to Bynum's ankle were negative, and the team said he had a moderate sprain. Bynum will be re-evaluated on Monday.
Bynum walked out of the arena on his own, noticeably limping, but did not need crutches and refused to ride a golf cart to his car. He said he felt fine but wouldn't comment on the severity until he was reexamined on Monday.
"I think it's OK," Lakers coach Mike Brown said of Bynum's injury. "He was able to walk out, and I just saw him as he left. ... I don't think it's going to be long-term."
Bynum injured his ankle when he came down awkwardly on the foot of teammate Josh McRoberts and was taken out of the game with 1:49 left in the first quarter for Pau Gasol. He had no points and three rebounds when he left the game.
After being suspended for the first four games of this season, Bynum has not missed any games this year due to an injury for the first time in five years. He is averaging a career-high 18.3 points and 12.1 rebounds per game and was voted to start in his first NBA All-Star Game.
"He's gotten better," said teammate Kobe Bryant. "You see him working on his footwork a lot, he has a lot of moves in his arsenal that he didn't have before. He's much more comfortable doing it and he's gained a great deal of confidence."
If Bynum has to miss a few days, Bryant said the Lakers can adjust.
"I don't think it's a championship formula, but we can for the time being," he said. "(Ramon) Sessions is one of those players who can carry a game offensively, he's a great scorer. And Pau can obviously do what he does."
Information from The Associated Press was used in this report.