Brown's attorney, Mark Geragos, said Tuesday night the singer checked in at an unspecified facility to be treated for anger issues.
"He just decided he wanted to take some time off and do some introspection," Geragos said.
Brown and his bodyguard were arrested early Sunday morning after an altercation at The W Hotel in Washington. Brown was initially charged with felony assault after a man said Brown or his bodyguard broke his nose with a punch when he tried to get a picture with the singer. The charge was reduced to a misdemeanor Monday and he was released from jail.
Though his troubles in Washington are no longer as serious as first thought, the arrest could still have ramifications for the 24-year-old Grammy Award winner.
Brown was placed on four years of probation after pleading guilty to assaulting Rihanna in California. He was required to take domestic violence courses and perform 1,400 hours of community service.
Brown's probation was briefly revoked this summer after a hit-and-run incident and a judge ordered him to perform an additional 1,000 hours of community service because there were questions about whether he actually completed his initial penalty.
Geragos has said the singer will be exonerated. He said Brown's decision to enter rehab is not an acknowledgement of wrongdoing in the Washington case.
The singer faces up to four years in prison should a judge decide to revoke his probation again.