Each client’s treatment plan will be unique, based on their individual needs, and to ensure recovery success. Most IOP programs are merely part of a larger continuum of care, from detox and PHP to Outpatient Programs and aftercare. Depending on the severity of your disorders and your level of participation in treatment, treatment usually takes place between 30 and 90 days. The IOP program would only be a portion of that timeline, lasting a few weeks.