Tracy Breen, MD

Dr. Breen has served as the Chief Medical Officer at Mount Sinai West since September 2014. In this role she oversees safety, quality and clinical care at the hospital and works closely with hospital and health system leadership across multiple service lines. Dr. Breen also manages issues related to the medical staff and frequently partners with health system leaders in risk management, legal affairs and quality. In addition to her local hospital leadership role, Dr. Breen chairs the system Med-Surg Value Analysis Sub-committee, which is part of the larger system-wide Value Analysis Steering Committee. As executive sponsor of the Mount Sinai West Diversity Council, Dr. Breen has also engaged with the Office of Diversity and Inclusion (ODI) in supporting ongoing staff training efforts aimed at identifying and reducing unconscious bias. Since the beginning of the COVID-19 pandemic, Dr. Breen has overseen all clinical response operations at Mount Sinai West with respect to developing and overseeing “surge” units, therapeutics, novel staffing strategies, and workplace safety initiatives.

Prior to her current position, Dr. Breen was Director of Diabetes Care and Chief of Endocrinology for the Northwell Health System. Previously, she served as Clinical Director for the Mount Sinai Diabetes Center for many years. In these roles, Dr. Breen worked closely with senior leadership on strategic planning, as well as developing diabetes and general endocrine services. Much of Dr. Breen’s professional focus has been on improving patient safety. The inpatient diabetes services that she implemented at both North Shore University Hospital and Long Island Jewish Hospital achieved the prestigious Joint Commission Advanced Certification in Inpatient Diabetes.

Dr. Breen earned her MD degree at the NYU School of Medicine. She remained at NYU for her internal medicine residency and served an additional year as Chief Resident. At Columbia University, Dr. Breen completed an NIH-funded research fellowship in Endocrinology, Diabetes and Metabolism, where her work focused on neuroendocrine mechanisms of energy homeostasis.