One month is considered "short-term rehabilitation," and anything longer is thought about "long-term rehabilitation." The only difference between rehab lengths is that treatment is more extensive in short-term rehab since more treatment is being condensed into a much shorter amount of time. Unlike inpatient rehab, when you choose an outpatient program, each step of the rehabilitation process is usually finished at a different facility.As soon as that's completed, the real therapy can start 90 days is usually a minimum, but lots of individuals continue seeing a counselor or going to group treatment for several years. The longer you spend in rehab, the more costly it will be. Nevertheless, those who have extreme dependencies might not receive all the help that they need in short-term rehab.