Adult Intensive Outpatient Program (IOP) Monday to Wednesday, 12 to 4 pm Our IOP is an eight-week course of about twenty-four sessions, including group therapy sessions, three hours per day, Monday to Thursday. The IOP helps through two different tracks focusing on mental health and co-occurring substance use and medication-assisted treatment, including Buprenorphine and Naltrexone for opioid and alcohol use disorders.