James Lorenzen Boyer, MD

Ensign Professor of Medicine (Digestive Diseases); Emeritus Director, Yale Liver Center

Departments & Organizations

Internal Medicine: Digestive Diseases: Hepatology | Gastrointestinal Procedure Center

Office of Student Research

Yale Medical Group


Dr. James L. Boyer is the Ensign Professor of Medicine and Emeritus Director of the Liver Center at Yale University School of Medicine. He is a graduate of Haverford College (1958) and the Johns Hopkins University School of Medicine (1962). From 1982 until 1996 he directed a combined Digestive Disease Section in the Department of Medicine. He was the founding Director of the NIDDK funded Liver Center at Yale since 1984. and former Director of the NIEHS Center for Membrane Toxicity Studies at the Mt Desert Island Biological Laboratory in Salsbury Cove, ME where he was also Chairman of their Board of Trustees from 1995 to 2003 and again from 2011-2013. He is also past Chair, Board of Directors of the American Liver Foundation and a current member of Board of Mangers of Haverford College. Dr. Boyer has a broad interest in all aspects of basic and clinical hepatology. His laboratory's major efforts have been the study of mechanisms of bile formation and cholestasis , currently supported by a MERIT award from NIDDK. He is a member of the AASLD, ASCI, AAP,APS and ACCA and past president of both the American and the International Association for the Study of Liver Disease. He is the recipient of Distinguished Achievement Awards from the AGA, AASLD and American Liver Foundation.

Education & Training

MD Johns Hopkins University (1962)
Fellow Yale University School of Medicine
Resident Yale - New Haven Hospital
Resident New York Hospital

Honors & Recognition

  • Spinoza ProfesesorshipUniversity of Amsterdam, the Netherlands (2009)

  • NIH MERIT AwardNational Institutes of Health (2008)

  • Distinguished Scientific Achievement AwardAmerican Liver foundation (1999)

  • Distinguished Achievement Award American Association for the Study of the Liver (1998)

  • Ismar-Boas Medal German Society of Gastroenterology and Metabolism (1996)

  • Ensign ProfessorshipYale University (1996)

  • Distinguished Achievement Award American Gastroenterology Association (1989)

  • Adolf-Windaus Prize Falk Foundation (1988)

Professional Service

  • Member, Board of Managers Haverford College (2009 - 2013)

  • Board member and immediate past Board Chair Mt Desert Island Biological Laboratory (1995 - 2013)

  • voluntary health agency American Liver Foundation (1976)

  • Committee member Yale University School of Medicine

International Activity

  • Bile formation Austria; Switzerland; Germany; Italy; Netherlands; Thailand (2008)

    Dr. Boyer collaborates with numerous researchers on projects related to the cellular and molecular mechanisms of bile formation and mechanisms of liver injury that lead to impairment of this important physiologic process. He has been engaged in this NIH funded work for the past 30 years.

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Contact Info

James Lorenzen Boyer, MD
Patient Care Locations
Yale Digestive DiseasesTemple Medical Center
40 Temple Street, Ste Suite 1A

New Haven, CT 06510
Yale-New Haven Hospital
20 York Street

New Haven, CT 06510
Lab Location
The Anlyan Center
300 Cedar Street, Ste S240

New Haven, CT 06519
Office Location
The Anlyan Center
300 Cedar Street, Ste S241

New Haven, CT 06519
Mailing Address
PO Box 208019
333 Cedar Street

New Haven, CT 06520-8019

Curriculum Vitae

Yale Liver Center