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Harvard Health Experts and Contributors

List of Experts

photo of Loren Rabinowitz, MD

Loren Rabinowitz, MD


Dr. Loren Rabinowitz is an instructor in medicine Beth Israel Deaconess Medical Center and Harvard Medical School, and an attending physician in the Inflammatory Bowel Disease Center at BIDMC. Her clinical research is focused on the intersection of inflammatory bowel diseases (IBD) and women’s health. She is passionate about achieving gender equity in medicine and gastroenterology, and has led multicenter national studies on gender dynamics in medical education, mentorship, and parental leave policies. Her work has been published in the New England Journal of Medicine, Lancet GI & Hepatology, Academic Medicine, American Journal of Gastroenterology, Gastroenterology, and Gastrointestinal Endoscopy, among others.
Read more about Loren Rabinowitz, MD
photo of David Ramsey, MD, PhD, MPH

David Ramsey, MD, PhD, MPH


David J. Ramsey, MD, PhD, MPH, is currently the Director of Ophthalmic Research at the Lahey Hospital & Medical Center, a part of Beth Israel Lahey Health. As a specialist in retinal disease, he performs surgery and sees patients in Peabody and Burlington, MA. Dr. Ramsey received his M.D. and Ph.D. degrees from the University of Illinois at Chicago College of Medicine in 2008. He completed his residency in Ophthalmology at the Wilmer Eye Institute of the Johns Hopkins School of Medicine (2009-2012) and afterwards a combined medical/surgical fellowship in vitreoretinal diseases at the Massachusetts Eye and Ear Infirmary (2012-2014). His research focuses on the prevention and detection of retinal diseases such as diabetes, macular degeneration, and glaucoma.
Read more about David Ramsey, MD, PhD, MPH
photo of Vikram Rangan, MD

Vikram Rangan, MD


Vikram Rangan, MD, is a gastroenterologist at Beth Israel Deaconess Medical Center (BIDMC) and is an Instructor in Medicine at Harvard Medical School. He joined the faculty in 2018, and is part of the irritable bowel syndrome (IBS) and motility team at BIDMC, which specializes in the diagnosis and management of GI motility disorders, as well as clinical research into novel treatment approaches for these conditions. Dr Rangan’s clinical and research interests include acid reflux, disorders of the stomach, and IBS.
Read more about Vikram Rangan, MD
photo of John J. Ratey, MD

John J. Ratey, MD


John J. Ratey MD, is an associate clinical professor of Psychiatry at Harvard Medical School and an internationally recognized expert in Neuropsychiatry. He has published over 60 peer reviewed articles and 11 books, including the groundbreaking ADHD “Driven to Distraction” series, and “Spark, The Revolutionary New Science of Exercise and the Brain.” Honored by the Massachusetts Psychiatric Society for Advancing the Profession, Ratey lectures around the world in additional to maintaining a private practice in Cambridge, Massachusetts and Los Angeles, California. He enjoys running, weight training and hiking with his wife. Web site: Facebook: Twitter: @jratey
Read more about John J. Ratey, MD
photo of Niyoti Reddy, MD

Niyoti Reddy, MD


Dr. Niyoti Reddy is currently an advanced fellow of obesity medicine at Massachusetts General Hospital/Harvard Medical School. She is a board-certified internist and has completed a fellowship in endocrinology and diabetes. She is also pursuing a fellowship in contemplative medicine, an innovative 12-month program to cultivate leaders committed to addressing challenges in the healthcare system. The core training is based on the teachings of the historical Buddha. Dr. Reddy has been practicing yoga and meditation for several years, and has chosen to be an obesity medicine specialist because it is the most impactful way for her to help people.
Read more about Niyoti Reddy, MD
photo of Emily Reiff, MD

Emily Reiff, MD


Dr. Emily Reiff is a maternal fetal medicine physician at Brigham and Women’s Hospital (BWH), specializing in high-risk obstetrics, and a clinical instructor at Harvard Medical School. Dr. Reiff completed a residency in obstetrics and gynecology at BWH and Massachusetts General Hospital, and a fellowship in maternal fetal medicine at Duke University. She currently sees pregnant patients in the maternal fetal medicine offices at BWH in Boston and Foxboro, and performs consultations in the Center for Fetal Medicine. Academically, she is interested in care redesign through quality improvement initiatives. She lives in Wellesley with her husband and daughter.
Read more about Emily Reiff, MD
photo of William Renthal, MD, PhD

William Renthal, MD, PhD


William Renthal, MD, PhD, is the director of molecular genetics at the John R. Graham Headache Center. Dr. Renthal completed his MD, PhD and neurology residency at the University of Texas Southwestern Medical Center, and joined Brigham and Women’s Hospital for his final year of residency and postgraduate training in headache medicine.   He is board certified in neurology and provides patients with comprehensive headache care including advanced diagnostics and personalized treatment plans, which may include behavioral/complementary therapy, medication and/or procedures (e.g. nerve blocks, Botox).   In addition to clinical care, Dr. Renthal conducts neuroscience and genetics research at Harvard Medical School where he is interested in the genetic and epigenetic mechanisms underlying migraine. He has published over 30 peer-reviewed articles and book chapters on his research.  
Read more about William Renthal, MD, PhD
photo of Kathryn Rexrode, MD, MPH

Kathryn Rexrode, MD, MPH


Dr. Kathryn Rexrode is the Chief of the Division of Women’s Health in the Department of Medicine at Brigham and Women’s Hospital (BWH) and an Associate Professor of Medicine at Harvard Medical School. Dr. Rexrode has broad and deep research experience in women’s health, with particular expertise in cardiovascular disease in women. She leads multiple grants from the National institute of Health and is the author of more than 250 research publications. Dr. Rexrode also leads the Office of Women’s Careers in the Center for Diversity and Inclusion at BWH where she works to advance gender equity, diversity and inclusion. Dr. Rexrode practices as primary care physician at the Gretchen and Edward Fish Center for Women’s Health at BWH. 
Read more about Kathryn Rexrode, MD, MPH
photo of Hope Ricciotti, MD

Hope Ricciotti, MD

Editor in Chief, Harvard Women's Health Watch

Hope A. Ricciotti, MD, is Editor in Chief of the Harvard Women’s Health Watch. She is an Associate Professor of Obstetrics, Gynecology, and Reproductive Biology at Harvard Medical School and leads the Department of Obstetrics, Gynecology, and Reproductive Biology at Beth Israel Deaconess Medical Center.
Read more about Hope Ricciotti, MD
photo of Shauna Rice, BS

Shauna Rice, BS


Shauna Rice, BS, is a clinical research fellow in Dermatology at Massachusetts General Hospital and Harvard Medical School. She is also an MD candidate at the University of Massachusetts Medical School and will be graduating in 2022.
Read more about Shauna Rice, BS
photo of James Richter, MD

James Richter, MD


James Michael Richter, MD, is a Physician at the Massachusetts General Hospital and Associate Professor of Medicine, Harvard Medical School in Boston, Massachusetts. He received his undergraduate degree from The University of Texas at Austin and Medical and Masters Degree from the University of Texas, Southwestern Medical School. He completed a residency in Internal Medicine and later a clinical and research fellowship in gastroenterology at the Massachusetts General Hospital and Harvard Medical School. He is a fellow of the American College of Physicians. Dr. Richter practices consultative and endoscopic gastroenterology. Dr. Richter has an established interest in healthcare systems development and quality management, infectious, and inflammatory enteric diseases. He served as a Trustee of the Partners Community Healthcare; the community network that is a part of the Partners HealthCare System and Trustee of the Massachusetts General Hospital. He was Medical Director of the Massachusetts General Physicians Corporation and its successor, the Massachusetts General Physicians Organization between 1992 and 2002. There he chaired the Managed Care, Medical Management, Medical Policy Committees and Clinical Performance Management Task Force. He was Chief Medical Officer of the Caritas Christi Health Care System from 2002 through 2004. Dr. Richter served as a member of the Baldrige National Quality Award Board of Examiners and the Massachusetts Medical Society Information Technology and Quality of Care Committees. He is recently the chair of the Society for General Internal Medicine National Clinical Practice Committee which is responsible for quality of care, practice management, and applications of clinical information technology. He currently serves on the advisory committee to CMS developing the criteria for episodes of care for MIPS and MACRA. He continues to have an active leadership role in medical management, safety and quality of care improvement at the Massachusetts General Hospital. His research interests include the effectiveness of care of the adult patient with digestive disease, screening for colorectal cancer, quality management in healthcare and healthcare systems development and improvement. He has contributed over 180 original papers and chapters to the medical literature.
Read more about James Richter, MD
photo of Eve Rittenberg, MD

Eve Rittenberg, MD


Eve Rittenberg, MD, is assistant professor of medicine at Harvard Medical School and a primary care internist at the Fish Center for Women’s Health at Brigham and Women’s Hospital. Her interests include women’s health, trauma-informed care, and health equity. She is a 2018–2021 Robert Wood Johnson Foundation Clinical Scholars fellow, working with an interdisciplinary team on trauma-informed care. She is the past medical director of primary care at the Fish Center, and is actively engaged in medical student education in women’s health.
Read more about Eve Rittenberg, MD
photo of Paul Rizzoli, MD

Paul Rizzoli, MD


Paul Rizzoli, MD, is board-certified in Internal Medicine, Neurology and Headache Medicine. He is the Clinical Director of the Graham Headache Center at the Brigham and Women’s/ Faulkner Hospital in Boston, Massachusetts. Begun in 1999 and affiliated with the Harvard Medical School, it is one of the largest UCNS-accredited training programs in Headache Medicine in the United States. This academic headache center, located on the Faulkner Hospital campus, has as its mission to re-establish the Faulkner’s longstanding reputation for excellence in headache care and to carry on the legacy of Dr. John Graham, an early headache pioneer. The center is known for excellence in headache management, research and for clinical training in Headache Medicine.
Read more about Paul Rizzoli, MD
photo of Celeste Robb-Nicholson, MD

Celeste Robb-Nicholson, MD


Celeste Robb-Nicholson, M.D., is an Associate Professor of Medicine at Harvard Medical School, Physician and Associate Chief of the General Internal Medicine Unit at Massachusetts General Hospital, and founding Editor-in-Chief of the Harvard Women's Health Watch. She also serves as the Medical Director of Primary Care Office InSite, a web site for general internists and their patients. In this role, she is responsible for the development of guidelines for primary care clinicians and health information for their patients. Dr. Robb-Nicholson received her undergraduate degree from Radcliffe College, her medical degree from Duke University, and her master's in public health in maternal and child health from the University of North Carolina at Chapel Hill. She is board certified in Internal Medicine. She maintains an active medical practice as a Primary Care Physician at Massachusetts General Hospital. 
Read more about Celeste Robb-Nicholson, MD
photo of Laura K. Rock, MD

Laura K. Rock, MD


Dr. Laura K. Rock is a pulmonologist and critical care physician at Beth Israel Deaconess Medical Center in Boston, and an assistant professor at Harvard Medical School. She is also faculty for the Center for Medical Simulation, and a VitalTalk instructor. She runs communication training programs and conducts research on debriefing as it relates to teamwork and patient safety. These include programs for effective and empathic communication between clinicians and patients or family members; work culture and how it affects teamwork, the patient experience, and clinician well-being; managing conflict at the bedside; and providing feedback that improves performance.
Read more about Laura K. Rock, MD
photo of Dennis Rosen, MD

Dennis Rosen, MD

Assistant Professor of Pediatrics, Harvard Medical School

Dennis Rosen, M.D. is a pediatric pulmonologist and sleep specialist at at Boston Children’s Hospital, where he is the associate medical director of the Center for Pediatric Sleep Disorders. He is also an assistant professor of pediatrics at Harvard Medical School. Dr. Rosen is author of Successful Sleep Strategies for Kids (Harvard Medical School Guide) and Vital Conversations: Improving Communication Between Doctors and Patients
Read more about Dennis Rosen, MD
photo of John Ross, MD, FIDSA

John Ross, MD, FIDSA


Dr. John Ross is an assistant professor of medicine at Harvard Medical School. He is board certified in internal medicine and infectious diseases, and practices hospital medicine at Brigham and Women’s Hospital. He is the author of Shakespeare’s Tremor and Orwell’s Cough: Diagnosing the Medical Groans and Last Gasps of Ten Great Writers, and is one of the editors of the textbook Principles and Practice of Hospital Medicine.
Read more about John Ross, MD, FIDSA
photo of Christian Ruff, MD, MPH

Christian Ruff, MD, MPH


Christian Thomas Ruff, MD, MPH, Director, Genetics Core Laboratory; Assistant Professor of Medicine, Harvard Medical School, Brigham and Women’s Faulkner Hospital, Boston, Massachusetts Christian T. Ruff, MD, MPH is the Director of General Cardiology at Brigham and Women’s Hospital and an Assistant Professor of Medicine at Harvard Medical School. He graduated from Harvard University with a degree in Neurobiology and earned his medical degree at Johns Hopkins University School of Medicine. Dr Ruff is an investigator in the Thrombolysis in Myocardial Infarction (TIMI) Study Group and serves as the Director of the Genetics Core Laboratory and as Co-Director of the Clinical Events Committee. He has specific expertise in atrial fibrillation, risk stratification and implementation of antithrombotic therapy for stroke prevention, as well as the treatment and prevention of venous thromboembolism.
Read more about Christian Ruff, MD, MPH
photo of Emily S. Ruiz, MD, MPH

Emily S. Ruiz, MD, MPH


Emily Ruiz, MD, MPH, is an Associate Physician at the Mohs and Dermatologic Surgery Center at Dana-Farber/Brigham and Women’s Cancer Center, an Instructor in Dermatology at Harvard Medical School and Director of the High-Risk Skin Cancer Clinic at Dana Farber/Brigham and Women’s Hospital. Dr. Ruiz received her undergraduate degree from Duke University, medical degree from New York University School of Medicine, and Master of Public Health Degree from Harvard School of Public Health. She completed an internship in internal medicine at New York University School of Medicine, dermatology residency at Albert Einstein College of Medicine, and fellowship in Micrographic Surgery and Dermatologic Oncology at Brigham and Women’s Hospital.
Read more about Emily S. Ruiz, MD, MPH
photo of Elisabeth J. Ryan, JD, MPH

Elisabeth J. Ryan, JD, MPH

Guest Contributor

Elisabeth Ryan, JD, MPH, is the Legal Fellow at the Northeastern University School of Law Center for Health Policy and Law. She has formerly practiced as a public defender and as deputy general counsel for the Massachusetts public safety executive office. She currently heads Public Health Law Watch and her work focuses on the intersection of criminal justice and public health.
Read more about Elisabeth J. Ryan, JD, MPH
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