Marie McDonnell

Dr. McDonnell is Chief of the Diabetes Section in the Division of Endocrinology, Diabetes and Hypertension at Brigham and Women’s Hospital and Harvard Medical School in Boston. In her current role as Director of the Diabetes Program at Brigham Health, Dr. McDonnell provides clinical, academic, and administrative leadership of the hospital-wide diabetes program.

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A graduate of Boston University School of Medicine, the New York Presbyterian Hospital-Columbia residency program, and Endocrinology fellowship at Boston Medical Center, Dr. McDonnell’s clinical research focus is health outcomes of scalable specialty-level diabetes care delivery services in the acute and ambulatory settings. Dr. McDonnell teaches medical students at Harvard Medical School and is key faculty for both the Medicine and Endocrinology training programs at Brigham and Women’s Hospital. She mentors many trainees per year and has received recognition for her mentorship of junior faculty. She delivers multiple local, regional and international lectures and webinars per year in the field of Diabetes Care, has served as associate editor for Endocrine Practice, and is a section co-editor for Current Diabetes Reports.

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As a highly engaged clinician, she has served on several national committees and was appointed Chair of the Endocrine Society Guidelines committee in 2021. She has co-authored the Society of Thoracic Surgeons practice guideline on blood glucose management during adult cardiac surgery, and multiple Endocrine Society guidelines, including the Pharmacologic Management of Obesity, and Management of Diabetes in Older Adults and the Management of Hyperglycemia in the Hospital Setting.