Mark Siegler, MD

UChicago Faculty Physicians

Mark Siegler, MD

Lindy Bergman Distinguished Service Professor of Medicine
Professor of Surgery Director, MacLean Center for Clinical Medical Ethics
Executive Director, Bucksbaum Institute for Clinical Excellence

Mark Siegler, MD, is the Lindy Bergman Distinguished Service Professor of Medicine, the director of the MacLean Center for Clinical Medical Ethics, and the executive director of the Bucksbaum Institute for Clinical Excellence. A respected physician, specializing in internal medicine, Dr. Siegler is internationally known for his work in the field of clinical medical ethics, a field he created and named in 1974. In 1984, the University of Chicago established the MacLean Center for Clinical Medical Ethics, which quickly became the largest program in clinical ethics in the world. More than 450 physicians and other health professionals have trained at the MacLean Center, many of whom now direct ethics programs in the United States, Canada, Europe, Australia, Africa and China.

An honors graduate of Princeton University, Dr. Siegler received his medical degree in 1967 from the University of Chicago. He was an intern, resident and chief resident of medicine at the University of Chicago, followed by a year of advanced training at the Hammersmith-Royal Postgraduate Hospital in London, England. In 1972 he joined the University of Chicago faculty as one of the original faculty in the newly created Section of General Internal Medicine. In this capacity, he organized and directed one of the early medical intensive care units (MICUs) in Chicago. Dr. Siegler has practiced internal medicine at the University for 47 years.

Dr. Siegler’s seminal 1981 paper on "A Proposal for a Model of the Doctor Patient Encounter" was cited extensively by the 1982 President’s Commission as the basis for recommending a shared decision-making approach for doctors and patients, an approach which has now become the standard model for the doctor-patient relationship in the U.S.

Dr. Siegler, whose research interests include the ethics of the doctor-patient relationship, living–donor organ transplantation, end-of-life care, ethics consultation and medical decision-making, has published more than 200 journal articles, 50 book chapters and six books. His textbook "Clinical Ethics: A Practical Approach to Ethical Decisions in Clinical Medicine," co-authored with Albert Jonsen and William Winslade, is now in its 8th edition, has been translated into nine languages, and is widely used by physicians and health professionals around the world. His most recent book “Clinical Medical Ethics: Landmark Works of Mark Siegler, MD,” was published by Springer in 2017.

Dr. Siegler is a master of the American College of Physicians and an elected fellow of the Association of American Physicians and The Hastings Center.

Areas of Expertise

  • General Internal Medicine
  • Chronic Disease Management
  • Medical Ethics

Board Certifications

  • Internal Medicine

Memberships & Medical Societies

  • American College of Physicians
  • Hastings Center
  • Association of American Physicians

Practicing Since

  • 1967

Languages Spoken

  • English

Medical Education

  • University of Chicago Pritzker School of Medicine


  • University of Chicago Medicine


  • University of Chicago Medicine


  • University of Chicago Medicine

News & Research

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  • University of Chicago Health Plan (UCHP)

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