Harvard Health Experts and Contributors

Hyun-Sik Yang, MD

Contributor

Dr. Hyun-Sik Yang is an assistant professor of neurology at Harvard Medical School and a board-certified neurologist at Mass General Brigham (MGB). Dr. Yang graduated from Seoul National University College of Medicine (South Korea) and finished his residency at MGB, followed by a behavioral neurology and neuropsychiatry fellowship at Brigham and Women’s Hospital. He sees patients with cognitive/memory problems, and also leads a research laboratory focusing on genetics and blood diagnosis of Alzheimer’s disease and related diseases, including LATE dementia. He has led or participated in multiple studies on LATE, including the recent clinical diagnostic criteria for LATE.

Charlotte S. Yeh, MD

Chief Medical Officer, AARP Services, Inc., Guest Contributor

Dr. Charlotte Yeh is the Chief Medical Officer for AARP Services, Inc. In her role, Dr. Yeh works with the independent carriers that make health-related products and services available to AARP members, to identify programs and initiatives that will lead to enhanced care for older adults Dr. Yeh has more than 30 years of healthcare experience – as a practitioner and Chief of Emergency Medicine at Newton-Wellesley Hospital and Tufts Medical Center, as the Medical Director for the National Heritage Insurance Company, a Medicare Part B claims contractor, and as the Regional Administrator for the Centers for Medicare and Medicaid Services in Boston. Dr. Yeh is widely recognized for her commitment to and passion for the healthcare consumer and has received numerous honors for her efforts on behalf of patients. As a health care leader, she has served on numerous boards and committees throughout her career, and currently sits on the Blue Cross Blue Shield of Massachusetts Foundation Board, the Optum Labs Scientific Advisory Board, and the HX360 Advisory Board. Dr. Yeh received a BA from Northwestern University and her medical degree from Northwestern University Medical School. She completed her internship in General Surgery at the University of Washington and her residency in Emergency Medicine at UCLA.

James Yeh, MD, MPH

Contributor

James Song-Jeng Yeh, MD, MPH, practices internal medicine at Massachusetts General Hospital and is an instructor in medicine at Harvard Medical School, where he actively teaches medical students and residents. His clinical interests and expertise are evidence-based medicine, cardiopulmonary diseases, cardiovascular risk reduction, critical illness, care transition, medication adherence, polypharmacy, health communication, and medical education. Dr. Yeh completed his medical training at Harvard Medical School teaching hospitals with internal medicine residency and fellowship at Cambridge Hospital and Brigham and Women’s Hospital. During fellowship, he conducted research in the field of pharmacoepidemiology with focus on evidence-based medicine, conflict of interest, academic detailing/educational outreach, and medication safety/boxed warning. Dr. Yeh also completed an editorial fellowship at the New England Journal of Medicine. He has published in various academic journals including the New England Journal of Medicine, JAMA Internal Medicine, and the Journal of Graduate Medical Education. Dr. Yeh’s clinical work involves both ambulatory and in-patient medicine with focuses on providing care to patients with general primary care issues to those with complex medical illness including chronic critically ill patients on chronic ventilation, ventricular assist devices, recent lung, liver, and heart transplant patients, oncology and bone marrow transplant patients, and patients with disorder of consciousness/stroke patients. He is also a team physician for the New England Revolution.

Soo Jeong Youn, PhD

Contributor

Dr. Soo Jeong Youn is the Director of Evaluation at Community Psychiatry Program for Research in Implementation and Dissemination of Evidence-Based Treatments (PRIDE) at Massachusetts General Hospital (MGH), and an Assistant Professor in Psychology in the Department of Psychiatry at Harvard Medical School. She completed her Ph.D. in Clinical Psychology at the Pennsylvania State University, and her clinical internship at Massachusetts Mental Health Center/Beth Israel Deaconess Medical Center/Harvard Medical School.

Soo Youn, PhD

Contributor

Elaine W. Yu, MD, MMSc

Contributor

Elaine W. Yu, MD, MMSc, is associate professor in medicine at Harvard Medical School, a board-certified endocrinologist in the endocrine unit of Massachusetts General Hospital (MGH), and director of the MGH bone density center. She is an NIH-funded academic clinical investigator with research focusing on osteoporosis and metabolic bone disease, and she has been named as Chen Institute MGH Research Scholar 2023–2028. Dr. Yu has been honored as a Fellow of the American Society for Bone and Mineral Research (ASBMR), serves as chair of the ASBMR professional practice committee, and has held multiple roles within the Endocrine Society. Dr. Yu’s passion is to advance a bone and metabolism research program focused on rigorous scientific principles and team science, and to promote clinical excellence in osteoporosis care.

Marc Gregory Yu, MD

Contributor

Marc Gregory Y. Yu, MD is an American Diabetes Association (ADA) research fellow in the Section of Vascular Cell Biology at Joslin Diabetes Center. He finished medical school at the top of his class at the University of the Philippines-Philippine General Hospital, and completed residency in internal medicine and fellowship in endocrinology at the same institution thereafter. He is the first Filipino endocrinologist to receive the Endocrine Society Early Investigator Award in 2017. His main research interests include studying risk and protective factors for cardiovascular disease in patients with long-standing Type 1 diabetes, as well as looking at the interplay of autoimmunity, rare diabetes genes, and pancreatic beta-cell function. He is also co-author of I.M. Platinum, a bestselling Philippine handbook on Internal Medicine.

Harvard Health Experts and Contributors

List of Experts

Hyun-Sik Yang, MD

Charlotte S. Yeh, MD

James Yeh, MD, MPH

Soo Jeong Youn, PhD

Soo Youn, PhD

Elaine W. Yu, MD, MMSc

Marc Gregory Yu, MD