Call 888-810-5995 to speak with a Methadone counselor. Who Answers? Methadone Doctors in Belmont, Massachusetts Arthur Siegel, M.D. McLean Hospital 115 Mill Street Belmont, MA 02478 View Details → Aaron Frenz, M.D. McLean Hospital-- CEC 115 Mill Street Belmont, MA 02478 View Details → Page 2 of 2«12