Call 888-810-5995 to speak with a Methadone counselor. Who Answers? Methadone Doctors in Bismarck, North Dakota Scharazard Gray, M.D. 905 East Interstate Avenue Bismarck, ND 58503 View Details → Melissa Henke, M.D. Heartview Foundation 101 East Broadway Bismarck, ND 58501 View Details → Kurt Datz, D.O. 811 East Interstate Avenue Bismarck, ND 58503 View Details → Kent Diehl, M.D. 2830 North Washington Street Bismarck, ND 58503 View Details → David Mack, M.D. 900 East Broadway Po Box 5510 Bismarck, ND 58506 View Details →