1 month is considered "short-term rehabilitation," and anything longer is thought about "long-term rehab." The only difference between rehab lengths is that treatment is more extensive in short-term rehabilitation since more treatment is being condensed into a much shorter amount of time. Unlike inpatient rehabilitation, when you choose for an outpatient program, each action of the rehab process is generally finished at a separate center.When that's completed, the real treatment can begin 90 days is generally a minimum, however lots of people continue seeing a counselor or participating in group treatment for several years. The longer you spend in rehab, the more expensive it will be. However, those who have extreme dependencies may not get all the assistance that they require in short-term rehab.