beth israel deaconess medical center a harvard medical school teaching hospital

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Mark L. Zeidel, MD


Dr. Mark L. Zeidel, MD has served as Herrman Blumgart Professor of Medicine at Harvard Medical School and Physician-in-Chief and Chairman of the Department of Medicine at the Beth Israel Deaconess Medical Center since 2005.

Dr. Zeidel was born at the Beth Israel Hospital and grew up in Natick, Massachusetts. He received his medical degree from Columbia University’s College of Physicians and Surgeons, and completed an internship and residency in Internal Medicine and a fellowship in Nephrology at Brigham and Women's Hospital, where he remained on the faculty as Section Chief of Nephrology until 1993. Dr. Zeidel moved on to serve as Chief of the Renal-Electrolyte Division in the Department of Medicine at the University of Pittsburgh. In 1996, he was named interim Chair of the Department in Pittsburgh, and was shortly appointed to the Jack D. Myers Professor and Chair of the Department of Medicine. He remained there until returning to BIDMC as Chair of Medicine.

In addition to his administrative duties, Dr. Zeidel is an active nephrologist and researcher, with a particular interest in the kidney’s role in filtration. In response to questions regarding future plans for the Department of Medicine, Dr. Zeidel says, “As an elite national institution, we will continue to innovate in delivering excellent, high quality care.”

Mark Aronson, MD

Vice-Chair for Quality

Mark Aronson, Vice-Chair for Quality

Dr. Mark Aronson is Professor of Medicine at Harvard Medical School, Vice Chair for Quality in the Department of Medicine, and Associate Chief of the Division of General Medicine and Primary Care. He also maintains an active primary care practice. Dr. Aronson is the founder of BIDMC’s Hospital Medicine program, which oversees the care of about half of BIDMC’s general medicine admissions, as well as the founding director of the Stoneman Center for Quality Improvement, which focuses on improving patient safety and quality of care. Dr. Aronson is a valued leader in medical education at BIDMC, Harvard Medical School, and nationwide. He served as Chief of the George Kurland Firm at BIDMC for more than 20 years, and has served as a Director of Harvard's Risk Management Foundation and on the Board of Directors of the Society of Hospital Medicine. He is Deputy Director for Harvard's premier CME course, Pri-Med. As a researcher, Dr. Aronson focuses on making evidence-based medical care more cost effective and on improving medical safety and quality for both hospitalized and ambulatory patients.

Anthony Hollenberg, MD 

Vice-Chair for Mentorship

Anthony Hollenberg, Vice-Chair for Mentorship

Dr. Anthony Hollenberg is Chief of Division of Endocrinology, Diabetes and Metabolism, Professor of Medicine at Harvard Medical School, and Director of the Clinical Investigator Training Program at Harvard Medical School. Dr. Hollenberg first came to BIDMC for his Internal Medicine residency, which he completed in1989, and was chief resident in Medicine in 1990-1991. Dr. Hollenberg then completed a fellowship in Endocrinology, Diabetes, and Metabolism at Massachusetts General Hospital in 1993 and was recruited back to Beth Israel to start his laboratory. As Chief of Endocrinology, Diabetes and Metabolism, Dr. Hollenberg leads a division that is internationally recognized for its clinical care and research. Dr. Hollenberg’s own research focuses on the hormonal regulation of metabolism, with a particular emphasis on the role of thyroid hormone. His work has important ramifications for the regulation of body weight and metabolism.

Barbara Kahn, MD 

Vice-Chair for Research Strategy

Barbara Kahn, Vice-Chair for Research Strategy

The George R. Minot Professor of Medicine at Harvard Medical School, Dr. Barbara Kahn served as Chief of the Diabetes Unit and Division of Endocrinology, Diabetes and Metabolism before being appointed as a Vice-Chair in the Department of Medicine. She is a member of the Institute of Medicine of the National Academy of Sciences and an internationally-recognized scientist in the area of molecular mechanisms in obesity and diabetes. Dr. Kahn's work establishing the fat cell as an endocrine organ has led to important insights into type 2 diabetes pathogenesis and new therapeutic approaches. She has served on the National Board of Directors of the American Diabetes Association and on both the Diabetes and Obesity Committees of the American Heart Association. Currently, she represents BIDMC on an inter-institutional steering committee for the Broad Institute of MIT and Harvard. She has mentored numerous trainees who have become outstanding independent scientists.

Eileen Reynolds, MD

Vice-Chair for Education

Eileen Reynolds, Vice-Chair for Education

Dr. Eileen Reynolds is the Vice Chair for Education, overseeing the educational programs at all levels throughout the Department. She moved to this role after spending 13 years as the Internal Medicine Residency Program Director.  In addition, she is the Faculty Director of the Linde Family Fellowship in Primary Care Leadership, a newly endowed year long program for emerging leaders. Currently a Professor of Medicine at Harvard Medical School, Dr. Reynolds has served as a faculty member in Internal Medicine at the University of California, San Francisco and the Hospital of the University of Pennsylvania. In her role at the latter, she created and served as the initial Program Director for their Primary Care Internal Medicine Residency Program. In 2010, she won the ACGME's highest teaching award, the Parker Palmer Courage to Teach Award. She is a national leader in medical education, having served a 7-year term on the Residency Review Committee in Internal Medicine; participated in numerous efforts of the American College of Physicians, the American Board of Internal Medicine, and the Society of General Internal Medicine; and served as President of the Society of General Internal Medicine in 2016-2017.

Peter F. Weller, MD

Vice-Chair for Research

Peter Weller, Vice-Chair for Research

Dr. Peter Weller is Professor of Medicine at Harvard Medical School (HMS) and Chief of both the Infectious Diseases Division and the Allergy and Inflammation Division in the Department of Medicine. He also serves as a member of the Executive Committee of the Department of Medicine at HMS. Dr. Weller's research studies, supported principally by longstanding NIH RO1 grants, have focused on delineating basic mechanisms of leukocyte functioning in forms of inflammation. Dr. Weller's clinical areas of interest and expertise include parasitic infectious diseases and allergic diseases, and his teaching contributions have included lectures for HMS, HST and HSPH students on parasitic infections and eosinophilic diseases. He has consistently been a teacher of medical students, residents, and fellows as a longstanding annual Attending Physician on the Medicine and Infectious Diseases services at the Beth Israel Deaconess Medical Center.

Contact Information

Department of Medicine
Beth Israel Deaconess Medical Center
East Campus, Yamins 419
330 Brookline Avenue
Boston, MA 02215