If you are at immediate physical risk, you need inpatient treatment.
If you are not making progress in outpatient therapy, you need something more intensive.
If you’ve been doing great for months and have an established support system, you can decrease your level or frequency of treatment.
… but, is there such a thing as “touch-up” treatment?
In the spirit of my remission and relapse post, I’d like to emphasize the many shades of gray between the two extremes.  You don’t wake up one morning to have fallen off the recovery cliff overnight (though …