Dr. Nancy J. Wei is an endocrinologist and also the Medical Director for Clinical Informatics at the Massachusetts General Hospital (MGH). She is also an assistant professor of medicine at Harvard Medical School. She is board certified in Internal Medicine and Endocrinology, Diabetes, and Metabolism, and is a practicing endocrinologist at the MGH Diabetes Center and MGH Chelsea Health Center. She also serves at the Associate Director of the Inpatient Diabetes Management Service.

She earned her M.D. from Harvard Medical School, her M.MSc. from Harvard Medical School, and completed her internship and residency in internal medicine and fellowship in endocrinology, diabetes and metabolism at MGH.

 Dr. Wei became involved with clinical systems and health care information technology in 2014 when she lead the MGH preparation and successful implementation from legacy clinical systems to Epic. She became the MGH Medical Director for Clinical Informatics in 2019, where she leads the optimization, development, implementation, and support of clinical information systems across the hospital.