Michael J. Barry is director of the Health Services Research Program, medical director of the John D. Stoeckle Center for Primary Care Innovation and professor of medicine at Harvard Medical School. He has been chief of the general medicine unit at the Massachusetts General Hospital (MGH), president of the Society for Medical Decision-Making (SMDM) and president of the Society of General Internal Medicine.

Dr. Barry was the principal investigator of the Prostate PORT-II. He is currently principal investigator on a project comparing screening and treatment intensity and prostate cancer mortality in the Connecticut and Seattle SEER areas. He heads the Endpoints Committee for the Prostate cancer Intervention Versus Observation Trial (PIVOT), and the Steering Committee of the Complementary and Alternative Medicine for Urinary Symptoms (CAMUS) trial.

He is a medical editor for the Foundation for Informed Medical Decision-Making. His research interests include defining the outcomes of strategies for the evaluation and treatment of prostate disease, decision analysis, health status measurement, technology assessment, and the use of decision aids to facilitate patients' participation in decision-making. From the clinical perspective, he is a practicing general internist, and is responsible for over 200 primary care physicians caring for about 150,000 loyal patients in 15 practices that are part of the MGH.