Harvard Health Experts and Contributors

List of Experts

photo of Todd Ellerin, MD

Todd Ellerin, MD


Dr. Todd Ellerin has been director of infectious diseases and vice chairman of the department of medicine at South Shore Hospital in Weymouth, MA for 17 years. He is an associate physician at Brigham and Women’s Hospital in Boston and an instructor in medicine at Harvard Medical School. Additionally, he serves as medical director of the Weymouth Department of Public Health, and was the medical technical specialist for SARS, H1NI, Ebola, and now 2019-nCoronavirus at South Shore Health.
Read more about Todd Ellerin, MD
photo of Lauren Elson, MD

Lauren Elson, MD

Contributor; Editorial Advisory Board Member, Harvard Health Publishing

Dr. Lauren Elson is board certified in sports medicine and physical medicine and rehabilitation. She attended Tufts University School of Medicine, did her residency at New York Presbyterian Hospital Columbia/Cornell, and completed a fellowship in sports medicine at Stanford University. A former professional dancer and instructor of jazz, ballet, tap, hip-hop, African, swing, and salsa, she understands the goals and challenges of the physically active patient. She is a board member of the International Association for Dance Medicine and Science, the Boston Dance Alliance, and Abilities Dance Company. Dr. Elson is the chair of the Freelance Dancer/Independent Dance Committee for the Dance USA Taskforce on Dance Health, and is on the programming committee for the Performing Arts Medical Association. She has lectured nationally and internationally on dance health and injury prevention to dancers and professional organizations.
Read more about Lauren Elson, MD
photo of Lawrence Epstein, MD

Lawrence Epstein, MD


Lawrence Epstein, MD is an Assistant Professor in Medicine at Harvard Medical School, the Assistant Medical Director of the Sleep Disorders Service and Program Director for the sleep medicine fellowship program at Brigham and Women’s Hospital in Boston. He is board certified in Internal Medicine, Pulmonary Diseases, Critical Care Medicine and Sleep Medicine. He is a Past President of the American Academy of Sleep Medicine and the Medical Editor of the Harvard Medical School Special Health Report: Improving Sleep.
Read more about Lawrence Epstein, MD
photo of Christopher Estiverne, MD

Christopher Estiverne, MD


Originally from New Jersey, Dr. Christopher Estiverne is currently a staff nephrologist at Brigham and Women’s Hospital in Boston, where he specializes in care of patients with chronic kidney disease. He completed his medical degree and Internal Medicine training at Rutgers New Jersey Medical School, and is a recent graduate from the combined Brigham and Women’s Hospital/Massachusetts General Hospital nephrology fellowship program. His other interests include studying health care inequities and medical education.
Read more about Christopher Estiverne, MD
photo of Huma Farid, MD

Huma Farid, MD


Dr. Huma Farid is an obstetrician/gynecologist at Beth Israel Deaconess Medical Center, and an instructor in obstetrics and gynecology at Harvard Medical School. She directs the resident colposcopy clinic and is the associate program director for the obstetrics and gynecology residency program at BIDMC. She also writes and reviews medical content for Buoy Health. Dr. Farid graduated from Harvard Medical School. When not involved in resident education or patient care, she enjoys reading and writing.
Read more about Huma Farid, MD
photo of Susan Farrell, MD

Susan Farrell, MD

Contributing Editor

Dr. Susan Farrell is the Director of the comprehensive clinical skills OSCE examination at Harvard Medical School, and worked as an educator in the Partners Healthcare Office for Graduate Medical Education, before taking her current position as a Program Director at Partners Healthcare International in 2011. Dr. Farrell graduated from Syracuse University with a BS in engineering, and earned her M.D. at Tufts University School of Medicine in 1990. Her clinical training was in emergency medicine and medical toxicology, both at The Medical College of Pennsylvania.
Read more about Susan Farrell, MD
photo of Alessio Fasano, MD

Alessio Fasano, MD


Pediatric gastroenterologist Dr. Alessio Fasano is head of the Mucosal Immunology and Biology Research Center at Massachusetts General Brigham (MGB); professor of nutrition at the Harvard T.H. Chan School of Public Health; and professor of pediatrics at Harvard Medical School. He is director of the Center for Celiac Research and Treatment at MGB, and is widely sought after as an expert in gut microbiome, intestinal permeability, and autoimmune disorders including celiac disease. Dr. Fasano received his medical degree from the University of Naples School of Medicine. He is the author of Gluten Freedom and co-author with Susie Flaherty of Gut Feelings: The Microbiome and Our Health, published in March 2021 by MIT Press. View his work at Twitter @celiacresearch; Facebook @celiacresearch; and Instagram #celiacresearch.
Read more about Alessio Fasano, MD
photo of Jeremy Samuel Faust, MD, MS

Jeremy Samuel Faust, MD, MS


Jeremy Samuel Faust, MD MS MA, is an emergency physician at Brigham and Women’s Hospital and an instructor at Harvard Medical School. He completed his residency training at Mount Sinai Hospital and Elmhurst Hospital Center in New York, after graduating from the Mount Sinai School of Medicine (MD, MS in Biomedical Sciences). He is the cohost of FOAMcast, an award-winning free medical education podcast bridging core emergency medicine content with cutting-edge topics, which has been downloaded nearly 2 million times. He is a frequent contributor to Slate, has published essays in the New York Times, The New York Daily News, and Mother Jones and has appeared on the Rachel Maddow Show (MSNBC) and The Takeaway (Public Radio International/WNYC/WGBH). He serves on the editorial board of the Annals of Emergency Medicine and ACEP Now, and has served as a content editor for the New England Journal of Medicine Resident 360 Series. Peer review publications include the Annals of Emergency Medicine, EM Clinics of North America, Emergency Medicine Practice, Emergency Medicine Australasia, and Critical Ultrasound Journal. He has presented internationally at the Royal College of Emergency Medicine, Social Media and Critical Care (SMACC), and for the United Nations Medical Services Division, and domestically for the Society of Academic Emergency Medicine, The Council of Emergency Medicine Residency Directors, Resuscitation, and Controversies and Consensus in Emergency Medicine. He graduated from Williams College with Honors in Music and holds a Masters Degree in Music Composition and Theory from UC Davis. He is the associate conductor of the Longwood Chorus (an ensemble of medical professionals and students) and serves as board president of the Grammy-award winning vocal ensemble Roomful of Teeth. His wife Kate Taylor is a Metro reporter for the New York Times. Their baby daughter Maya is awesome. Follow him on Twitter @JeremyFaust.
Read more about Jeremy Samuel Faust, MD, MS
photo of Sara Fazio, MD, FACP

Sara Fazio, MD, FACP

Contributing Editor

MD practices General Internal Medicine at the BIDMC, and is an Associate Professor at Harvard Medical School. She received her undergraduate and medical degree from Brown University. After completing her internal medicine training at the Beth Israel Hospital in Boston, she was a chief resident at the Beth Israel Deaconess Medical Center, and subsequently completed a Rabkin Fellowship in Medical Education. She is the chair of the Board of Directors for the Alliance in Academic Internal Medicine. At Harvard, she is the Master of the Walter Bradford Cannon Society and the Associate Director of Innovation in Medical Education at the HMS Center for Primary Care. She directed the BIDMC Internal Medicine clerkship from 1999-2015 and was the CME Editor for the New England Journal of Medicine from 2011-2014. Dr. Fazio served as the SGIM (Society of General Internal Medicine) editor of the national CDIM (Clerkship Directors in Internal Medicine)-SGIM Curriculum in Internal Medicine. She has received numerous teaching awards, including the Best Clinical Teacher Award from the classes of 2003, 2005 and 2007 at Harvard Medical School, the Faculty Prize for Excellence in Teaching, the Louis Pangaro Educational Program Development Award from CDIM, the S. Robert Stone Award for Excellence in Teaching at Harvard Medical School and Beth Israel Deaconess Medical Center, and the SGIM National Award for Scholarship in Medical Education. Dr. Fazio is among a team of educators who were recently named winners of the second annual Costs of Care and American Board of Internal Medicine Foundation Teaching Value and Choosing Wisely Challenge.
Read more about Sara Fazio, MD, FACP
photo of Laura C. Fine, MD

Laura C. Fine, MD


Dr. Laura Fine is an ophthalmologist who specializes in cataract surgery and medical, laser, and surgical treatments for glaucoma. She is president and medical director of Ophthalmic Consultants of Boston, and is an instructor at Harvard Medical School and Tufts Medical School, where she trains medical students, residents, and fellows. Dr. Fine is past president of the New England Ophthalmological Society and the Chandler-Grant Glaucoma Society. She actively serves in leadership roles within the American Academy of Ophthalmology, including the AAO’s Eye Care America, a public service program that provides free eye care to seniors in need through a national network of volunteer ophthalmologists. She also serves on the board of the Ophthalmic Mutual Insurance Company, the largest medical malpractice insurer of ophthalmologists in the United States. Dr. Fine has special interest in patient safety and quality improvement, career development and mentorship, advanced technologies for early glaucoma detection, and surgical innovations for cataracts and glaucoma. She earned her medical degree at the University of Pennsylvania and completed her residency in ophthalmology at the University of California San Francisco. She completed her glaucoma fellowship at Harvard Medical School at the Massachusetts Eye and Ear Infirmary.
Read more about Laura C. Fine, MD
photo of Naomi D. L. Fisher, MD

Naomi D. L. Fisher, MD


Dr. Naomi Fisher is an endocrinologist at the Brigham and Women’s Hospital, and Associate Professor of Medicine at Harvard Medical School. She serves as Director of Hypertension Services at the Brigham and Women’s Hospital, with both clinical and research expertise in cardiovascular endocrinology. Dr. Fisher received her medical degree from the University of Pennsylvania. She completed her residency in internal medicine at the Massachusetts General Hospital, and her fellowship in Endocrinology, Diabetes and Hypertension at the Brigham and Women’s Hospital. She is a veteran teacher, speaking on local, national and international levels. In addition to medical topics, she teaches about effective communication.
Read more about Naomi D. L. Fisher, MD
photo of Jennifer Fisher, MMSc, PA-C

Jennifer Fisher, MMSc, PA-C

Health Writer

Jennifer is a board-certified physician assistant. She earned her bachelor of science in kinesiology at James Madison University, then went on to obtain her master of medical science at Tufts University School of Medicine, where she completed the physician assistant program. Jennifer has clinical experience in general and cosmetic dermatology, plastic surgery, and hospitalist medicine. In addition to her clinical work as a PA in dermatology, Jennifer works in medical writing. Jennifer is a member of the American Medical Writers Association (AMWA), American Academy of Physician Assistants (AAPA), and Society of Dermatology Physician Assistants (SDPA).
Read more about Jennifer Fisher, MMSc, PA-C
photo of Angela Fitch, MD

Angela Fitch, MD


Angela Fitch, MD, FACP, FOMA is the Associate Director of the Massachusetts General Hospital Weight Center and faculty at the Harvard Medical School. She is board certified in obesity medicine, internal medicine and pediatrics. Dr. Fitch graduated from the University of Cincinnati College of Medicine and then stayed for a combined residency in internal medicine and pediatrics. Dr. Fitch was chief resident in internal medicine before moving to Minnesota to practice primary care at Fairview Health Systems and the University of Minnesota. She began the practice of obesity medicine at the University of Minnesota treating children with obesity. In 2012, Dr. Fitch became the medical director for the Metabolic Health and Weight Management Clinic at Park Nicollet and began practicing obesity medicine full time. Dr. Fitch became a diplomate of the American Board of Obesity Medicine in 2012. Dr. Fitch moved back to Cincinnati to create a multidisciplinary medical surgical weight center. There she was also appointed medical director of the Executive Health Program and Vice President of Primary Care before moving to Boston. She currently is serving as Vice President of the Obesity Medicine Association. Dr. Fitch enjoys seeing patients of all ages to help them reach their weight and wellness goals.
Read more about Angela Fitch, MD
photo of Sarah Flier, MD

Sarah Flier, MD


Read more about Sarah Flier, MD
photo of Tamara Fong, MD, PhD

Tamara Fong, MD, PhD


Dr. Tamara Fong is an assistant scientist in the Aging Brain Center at the Hinda and Arthur Marcus Institute for Aging Research, and associate professor of neurology at Harvard Medical School. She directs the cognitive clinic within the Beth Israel Deaconess Medical Center COVID-19 Survivorship Program.
Read more about Tamara Fong, MD, PhD
photo of Richard Frank, PhD

Richard Frank, PhD


Richard G. Frank, PhD, is the Margaret T. Morris Professor of Health Economics in the Department of Health Care Policy at Harvard Medical School. From 2009 to 2011, he served as the deputy assistant secretary for planning and evaluation at DHHS directing the office of Disability, Aging and Long-Term Care Policy. From 2013 to 2014, he served as a Special Advisor to the Office of the Secretary at the Department of Health and Human Services, and from 2014 to 2016 he served as Assistant Secretary for Planning and Evaluation in the Department of Health and Human Services. His research is focused on the economics of mental health and substance abuse care, long term care financing policy, health care competition, implementation of health reform and disability policy. He was elected to the Institute of Medicine (National Academy of Medicine) in 1997. He is co-author with Sherry Glied of the book Better but Not Well (Johns Hopkins Press).
Read more about Richard Frank, PhD
photo of Elizabeth Pegg Frates, MD, FACLM, DipABLM

Elizabeth Pegg Frates, MD, FACLM, DipABLM


Dr. Beth Frates is a trained physiatrist and a health and wellness coach, with expertise in lifestyle medicine. She is an award-winning teacher at Harvard Medical School, where she is an assistant clinical professor. Dr. Frates is one of the first fellows of the American College of Lifestyle Medicine and a pioneer in lifestyle medicine. She developed and taught a college lifestyle medicine curriculum at the Harvard Extension School in 2014, and it is still one of the most well-received courses offered at the school. She was voted president of the American College of Lifestyle Medicine in August 2020. Dr. Frates serves as President from 2022 to 2024.
Read more about Elizabeth Pegg Frates, MD, FACLM, DipABLM
photo of Gregory Fricchione, MD

Gregory Fricchione, MD


Dr. Gregory Fricchione is associate chief of psychiatry, director of the Benson-Henry Institute for Mind Body Medicine and of the Chester Pierce Division of Global Psychiatry, and co-director of the McCance Center for Brain Health in the department of neurology at Massachusetts General Hospital, and the Mind Body Medical Institute Professor of Psychiatry at Harvard Medical School. He specializes in neuropsychiatry and psychosomatic medicine, and for over 40 years has helped care for patients with severe medical, neurological, and surgical illnesses. He has published more than 250 publications and has authored or co-authored six books, including Compassion and Healing in Medicine: On the Nature and Uses of Attachment Solutions for Separation Challenges and The Science of Stress. His research interests include study of the catatonic syndrome, the neurophysiology of stress and resilience, and how the comparative neurology of brain evolution illuminates our concepts of health and illness and medical caregiving.
Read more about Gregory Fricchione, MD
photo of Lawrence S. Friedman, MD

Lawrence S. Friedman, MD

Contributor; Editorial Advisory Board Member, Harvard Health Publishing

Dr. Lawrence Friedman is the Anton R. Fried, MD, Chair of the department of medicine at Newton-Wellesley Hospital, assistant chief of medicine at Massachusetts General Hospital, and a professor of medicine at Harvard Medical School and Tufts University School of Medicine. Dr. Friedman graduated from the Johns Hopkins University School of Medicine, and completed a residency in internal medicine at Johns Hopkins Hospital and a clinical and research fellowship in gastroenterology at Harvard Medical School and Massachusetts General Hospital in Boston.
Read more about Lawrence S. Friedman, MD
photo of Julia Frueh, MD

Julia Frueh, MD

Guest Contributor

Julia Frueh, MD, is a fifth-year child neurology resident at Boston Children's Hospital. She has a special interest in autism spectrum disorder and other neurodevelopmental disabilities, as well as transitions from pediatric to adult care.
Read more about Julia Frueh, MD
photo of Teresa Fung, MS, RD, ScD

Teresa Fung, MS, RD, ScD


Teresa Fung is an adjunct professor at the Harvard T.H. Chan School of Public Health. She received her BS and MS in nutrition from Cornell University, and her ScD in both nutrition and epidemiology from HSPH. She began her career as a registered dietitian at Yale-New Haven Hospital. In the last 20 years, her research has focused on methodology that assesses the quality of the entire diet, in particular the development of a number of diet quality indexes. She also examines the association of these diet quality measures and risk of chronic disease such as diabetes, cancer, cardiovascular disease, elderly fracture, and weight change. She is an associate editor for the Journal of Nutrition, member of the editorial board for the Journal of the Academy of Nutrition and Dietetics, and a member of the Best Diet panel at U.S. News & World Report. She is also a professor of nutrition at Simmons University in Boston.
Read more about Teresa Fung, MS, RD, ScD
photo of Robert Gabbay, MD, PhD, FACP

Robert Gabbay, MD, PhD, FACP


Robert A. Gabbay, MD, PhD, FACP, is Chief Medical Officer and Senior Vice President at Joslin Diabetes Center, and Associate Professor at Harvard Medical School. He oversees the clinical care for over 25,000 patients at Joslin, as well as the education and care programs Joslin delivers nationally and internationally. His research focuses on innovative models of diabetes care to improve to enhance diabetes outcomes and improve the lives of people with diabetes. To meet these goals, he has traversed many arenas including an initial career as a basic scientist researcher to development of better patient communication tools, creating the first broad scale diabetes registry, designing and implementing a care management training program, leading Pennsylvania’s statewide implementation of the Patient Centered Medical Home and defining the medical neighborhood and the role of centers of excellence in diabetes. Dr. Gabbay has received funding from the National Institute of Health Diabetes, Digestive and Kidneys Diseases (NIDDK), the Agency for Healthcare Research and Quality (AHRQ), and the Center for Medicare and Medicaid Innovation for his care transformation work. The reach of his work has been recognized through leadership roles in national and international activities to transform diabetes care. Dr. Gabbay has served as visiting professor, keynote speaker and organizing committees for global meetings of the American Diabetes Association, International Diabetes Federation, Endocrine Society, and the Diabetes Technology Society. Along with an extensive peer reviewed publication record, his views have appeared in popular press such as the New York Times, CNN, Oprah, the Washington Post and NPR. Dr. Gabbay completed his B.Sc. Degree at McGill University and his PhD in Biochemistry from the University of Wisconsin where he published on mechanisms of insulin signaling. He then went on to get his medical degree from the State University of New York at Brooklyn School of Medicine with a residency in Internal Medicine at New York Hospital-Cornell and fellowship in Endocrinology, Diabetes and Metabolism at a joint Joslin-Beth Israel Deaconess-Brigham and Women’s Hospital program at Harvard. Dr. Gabbay was a visiting scientist at MIT and a Professor of Medicine at Pennsylvania State University College of Medicine and founding director of the Penn State Institute of Diabetes and Obesity before coming to Joslin.
Read more about Robert Gabbay, MD, PhD, FACP
photo of Hanna Gaggin, MD, MPH

Hanna Gaggin, MD, MPH


Hanna Gaggin, MD, MPH, 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 the cardiovascular continuing medical education oversight committee at MGH. She is the subspecialty core educator for the internal medicine residency at MGH, and is active in peer education through her role as editor and course director for the MGH Cardiology Board Review Book and on-demand cardiology education with Harvard Medical School Graduate Medical Education.  
Read more about Hanna Gaggin, MD, MPH
photo of Joshua Gagne, PharmD, ScD

Joshua Gagne, PharmD, ScD


Joshua J Gagne, PharmD, ScD is an Associate Professor of Medicine at Brigham and Women’s Hospital and Harvard Medical School and an Associate Professor in the Department of Epidemiology at the Harvard T.H. Chan School of Public Health (Harvard Chan). Josh is Co-Lead of the Methods Core of the US Food and Drug Administration’s (FDA’s) Sentinel program, Co-Director of the Pharmacoepidemiology Program at Harvard Chan, and Co-Director of the Harvard-Brigham Drug Safety and Risk Management Research Center funded by the FDA. His research centers on methods for generating post-approval comparative safety and effectiveness evidence for new medical products. Josh teaches courses in pharmacoepidemiology and comparative effectiveness research at Harvard Chan and directs a course through Harvard Catalyst, the Harvard Clinical and Translational Science Center. His research is supported by the FDA, the Patient-Centered Outcomes Research Institute (PCORI), the Agency for Healthcare Research and Quality, the Reagan-Udall Foundation, and pharmaceutical companies. Josh is a recipient of the International Society for Pharmacoeconomics and Outcomes Research Award for Excellence in Application of Pharmacoeconomics and Health Outcomes Research. He serves on the editorial boards of Drug Safety and Pharmacoepidemiology and Drug Safety and is an Associate Editor for PCORI.
Read more about Joshua Gagne, PharmD, ScD
photo of Seth Gale, MD

Seth Gale, MD


Dr. Seth Gale is a behavioral neurologist at Brigham and Women’s Hospital (BWH), co-director of the brain health program at BWH, and assistant professor of neurology at Harvard Medical School. Dr. Gale’s research interest is in lifestyle and nonpharmacologic interventions, including the use of mobile health and other technologies, to promote brain health and reduce the risk of dementia and cognitive decline. He is also involved in clinical and research ethics and philosophy of medicine. Dr. Gale works as an investigator in Alzheimer disease at the Center for Alzheimer Research and Treatment at BWH.
Read more about Seth Gale, MD
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