Dr. Rengarajan received an B.A. from the University of Chicago and an M.D. and Ph.D. from Stanford University. She completed her residency in Internal Medicine at Brigham and Women’s Hospital and her endocrinology fellowship at Massachusetts General Hospital. 

Dr. Rengarajan specializes in treating endocrine disorders, with a particular focus on thyroid disorders, endocrine autoimmunity, and immunotherapy toxicities. She is an attending in MGH Thyroid Associates and on the Severe Immunotherapy Complications team. 

Dr. Rengarajan conducts translational research on thyroid cancer as well as autoimmune endocrine diseases, such as Hashimoto’s thyroiditis, Graves disease and type 1 diabetes. She additionally is involved in clinical and translational research related to endocrinologic complications of cancer immunotherapy.