An Intensive Outpatient Program (IOP) is a kind of treatment service and support program used primarily to treat chemical dependency that does not rely on detoxification. IOP operates on a small scale and does not require the intensive residential or partial day services typically offered by the larger, more comprehensive treatment facilities.
The typical IOP program offers group and individual services of 10–12 hours a week. IOP allows the individual to be able to participate in their daily affairs, such as work, and then participate in treatment at an appropriate facility in the morning or at the end of the day.
The typical IOP program encourages active participation in 12-step programs in addition to the IOP participation. IOP can be more effective than individual therapy for chemical dependency.
IOP is also used by some HMOs as transitional treatment for patients just released from treatment in a psychiatric ward.