Levels of care exist on a spectrum from "weekly therapy with a private clinician" to "locked psychiatric inpatient unit." Most teens never need the most intensive levels. Some teens need them and don't get them in time.
This page organizes the spectrum and helps families locate programs at each level. The level of care your teen needs is a clinical question that should be answered by an evaluation, not by a search engine — but understanding what each level is helps you ask better questions and recognize when a program is suggesting more or less intensity than fits.