- American Music Therapy Association, Inc. 8455 Colesville Road, Suite 1000 Silver Spring, Maryland 20910, USA Phone: (301) 589-3300 Fax: (301) 589-5175 E-mail: info@musictherapy.org. The mission of the AMTA is to advance public awareness of the benefits of music therapy and increase access to quality music therapy services in a rapidly ...www.namt.com