Intensive Outpatient Program (IOP)

An Intensive Outpatient Program provides structured mental health or SUD treatment, typically 9+ hours per week in three-hour sessions. IOPs are commonly denied via CO-50 (medical necessity) or CO-119 (benefit maximum). These are among the highest-value MHPAEA targets: payers that cover intensive outpatient physical rehabilitation without visit caps cannot impose stricter limits on behavioral health IOP under MHPAEA.