As other people have said, "therapist" is a general term. In order to call yourself a "psychologist" in most states you have to have either a PhD or a PsyD in psychology and be licensed. LCSW means "licensed clinical social worker" which is a 2-2.5 year master's program followed by another two years of supervised practice. Another common license someplaces is a LMFT (licensed marriage and family therapist" "Counselor" is another generic term. Licenses for counselors varies by state...sometimes they are called "licensed mental health counselors," etc. In some places you can call yourself a "therapist" or a "counselor" without any license at all. Insurance won't pay without a license, but often there aren't laws to keep them from self-pay practice.