One month is considered "short-term rehab," and anything longer is considered "long-lasting rehabilitation." The only difference in between rehab lengths is that treatment is more intensive in short-term rehabilitation because more treatment is being condensed into a shorter amount of time. Unlike inpatient rehab, when you opt for an outpatient program, each step of the rehabilitation procedure is typically completed at a separate center.Once that's completed, the real therapy can start 90 days is normally a minimum, but many individuals continue seeing a therapist or participating in group therapy for numerous years. The longer you spend in rehabilitation, the more pricey it will be. Nevertheless, those who have severe dependencies may not receive all the assistance that they require in short-term rehab.