Spector was taken to the California Substance Abuse Treatment Facility and State Prison at Corcoran earlier this week, corrections spokeswoman Terry Thornton said.
The 69-year-old Spector is serving 19 years to life for the fatal shooting of actress Lana Clarkson at his home in Alhambra in 2003.
Rachelle Spector said she was relieved her husband was out of North Kern State Prison.
She claimed Spector was mistreated there, forced to sleep naked on the floor for two nights and to eat out of a bowl with his hands “like a dog”.
Thornton said the prison does not mistreat inmates and the actions described by Spector’s wife “would be a violation of policies and laws”.