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Dr. Octavio J. Diaz is Chief Medical Officer of Steward Health Care System. In his role, Dr. Diaz is responsible for physician performance, quality outcomes, regulatory oversight, risk management and patient safety at all Steward facilities. Board certified in emergency medicine, Dr. Diaz received his undergraduate degree in Public Health from the University of Massachusetts at Amherst and earned his MD degree from the University of Illinois College of Medicine. He completed a residency in Emergency Medicine at the University of Massachusetts Medical Center and received a Master of Public Health degree from Boston University School of Public Health.