The American Massage Therapy Association (AMTA) is the largest 501 c non-profit professional organization of massage therapists in the United States, although there are other professional organizations such as the Associated Massage and Bodywork Professionals (ABMP).
The National Certification Board for Therapeutic Massage and Bodywork (NCBTMB) is the only national certifying group of massage therapists in the United States. This is the test that professional massage therapists take in the US even if their states don’t offer licensure, in an effort to demonstrate their knowledge. Over 34 U.S. states currently use it as a requirement for their state license as well. The certification earned by successful completion of the NCBTMB exam produced by the NCBTMB is NCTMB.