The 32-year-old "Keeping Up With the Kardashians" regular was dumped by the mother of his three children in July after nine years together, as he struggled with personal problems, reported Us magazine.
Disick briefly checked into a Costa Rica rehab for hallucinogenic treatment this past March, and checked into a Florida facility in July.
The news comes just hours after Lamar Odom, Khloe Kardashian's ex-husband, was found unconscious at the Love Ranch brothel in Crystal, Nev, on October 13.
Khloe's family members, meanwhile, continue to be by Odom's side as he remains in critical condition.