For those with a history of substance use disorder, you may be able to get a referral to a a halfway house; to obtain the referral you would need to be already enrolled in a substance abuse program and/or working with your transitions coordinator. Locations in Westchester include those listed below. A web search for “halfway houses” will bring you to national directories that can help identfy locations throughout New York State.
See the page in the Health section on Addiction for NYS treatment programs.