Thirty days is considered "short-term rehabilitation," and anything longer is thought about "long-lasting rehabilitation." The only difference in between rehab lengths is that treatment is more intensive in short-term rehabilitation since more therapy is being condensed into a much shorter time period. Unlike inpatient rehab, when you choose an outpatient program, each action of the rehabilitation procedure is usually completed at a different center.Once that's finished, the real therapy can begin 90 days is typically a minimum, but lots of people continue seeing a therapist or going to group therapy for multiple years. The longer you spend in rehabilitation, the more pricey it will be. However, those who have extreme dependencies may not get all the aid that they require in short-term rehab.