Dr. Johnson is a fellow of the American College of Cardiology and is board-certified in internal medicine, cardiology and nuclear cardiology. She has a busy faculty practice along with her responsibilities as a nuclear cardiologist. In addition to her clinical activities, she is actively involved in house-staff training and community service. She has served on the board of various organizations such as Queens Medical Society, and the Minority Health Institute. Presently, she is the co-chair of the American Heart Association, Long Island chapter. She lectures frequently and is engaged in outreach programs on issues relating to cardiovascular disease in women and minorities. Her activities have prompted her to be listed in the Castle Connolly's New York's Top Doctors, and she has served as a medical expert for Black Entertainment Television and PBS.
Dr. Johnson received her medical degree from Cornell University Medical College in 1992. She completed a residency in internal medicine in 1995, and a cardiology fellowship at Beth Israel Medical Center in New York City in 1998. She completed the CFHU Fellowship, and received her M.P.H. from the Harvard School of Public Health in 1998.Publications: Johnson, M. "Age at Menopause and Risk of Coronary Artery Disease—The Nurse Health Study." The Annals of Internal Medicine.