Dr. Gaggin is a general cardiologist, educator and clinical investigator at Massachusetts General Hospital and Harvard Medical School. She is a member of the Cardiovascular Medicine Section Leadership Council and Cardiovascular Continuing Medical Education Oversight Committee at Massachusetts General Hospital. She is the Subspecialty Core Educator for the Internal Medicine residency at Massachusetts General Hospital and is active in peer-education through her role as editor and course director for the MGH Cardiology Board Review and on demand cardiology education with Harvard Medical School Graduate Medical Education. In 2020, she was selected as one of the Anne Klibanski Visiting Scholars Award Recipients at Massachusetts General Hospital.

Dr. Gaggin serves as an Editorial Consultant for the Journal of the American College of Cardiology: Heart Failure and reviews for multiple cardiology and medicine peer-reviewed journals. Her research focuses on evidence-based application of precision medicine in cardiology. She is involved in single and multi-center clinical trials to evaluate heart failure, heart failure with preserved ejection fraction, TTR amyloidosis and myocardial infarction phenotypes using novel machine learning techniques, biomarkers and longitudinal data.

Dr. Gaggin graduated from the Eastern Virginia Medical School in 2003. She completed her Internal Medicine residency at the University of Virginia Health System, followed by an MPH at Harvard School of Public Health with a concentration in Quantitative Methods in 2007. She completed her clinical cardiology fellowship at the University of Pittsburgh Medical Center and clinical research fellowship at MGH and joined the faculty at Massachusetts General Hospital and Harvard Medical School in 2012.