Prince, who died April 21 at age 57, had entered an outpatient treatment program, ABC affiliate KSTP-TV reported.
The singer reportedly was seeking medical help for chronic hip pain, and hoped to “move away from” medication he was using to treat that pain, according to the station.
According to TMZ, Prince was treated for an overdose of the opioid painkiller Percocet days before his death, with his private plane making an emergency landing in Illinois following a concert in Atlanta.
The “1999” musician reportedly had painkillers in his possession at the time of his death. Authorities in Minnesota are investigating the possibility of an overdose.
Prince was found unresponsive in the elevator of his Paisley Park home in Minnesota. Responders were unable to revive him.
The results of an April 22 autopsy are pending.
Court papers filed by his sister Tyka Nelson state that the musician did not leave a will. Bremer Trust has been appointed temporary administrator to his estate, The court papers state that Bremer Bank had provided financial services to the singer for a number of years.