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Department Leadership


  • Chief, Section of General Internal Medicine

    Patrick G. O’Connor, MD is the Dan Adams and Amanda Adams Professor of General Medicine at the Yale University of Medicine and serves as the Chief of the Department of General Internal Medicine. Dr. O’Connor has focused his research on the interface between care and addiction medicine.

Vice Chiefs

  • Vice Chief, Veterans Affairs

    Dr. William C. Becker is a general internist with clinical epidemiology, addiction medicine and pain management training, whose research, educational and clinical efforts broadly aim to improve the quality of chronic pain treatment in general medical settings, especially in the complex overlap of chronic pain and opioid use disorder. He directs the Opioid Reassessment Clinic at the VA Connecticut Healthcare System and is PI or co-PI of several research projects through the VA, NIH, PCORI and the FDA.
  • Vice Chief, Diversity, Equity, and Inclusion

    Aba Black, MD is an Assistant Professor of General Internal Medicine, Associate Program Director for Diversity & Inclusion
  • Vice Chief, Community Affairs

    Karen E. Brown, MD is an experienced Internist with a demonstrated skill in Healthcare Information Technology (HIT), Healthcare Management. She is active in leadership in preventive health guidelines and EMR implementation at YNHHS and member of the Clinical Integration Steering Group. She became Medical director of primary care service line in Northeast Medical Group as of January 2020. Previously, she worked at Whitney Internal Medicine, bringing eleven years’ experience caring for patients at YNHH Adult Primary Care Center, where she was named director in 2002. She graduated from the University of Maryland School of Medicine and completed her residency at Yale New Haven Hospital.
  • Vice Chief, Clinical Affairs

    Matthew Ellman, MD is a Professor of General Internal Medicine, Director, Yale International Medicine Associates; Director, Medical Student Palliative and End-of-Life Care Education
  • Vice Chief, Faculty Affairs

    David Fiellin, MD is a Professor of General Internal Medicine, of Emergency Medicine, and of Public Health, Director, Program in Addition Medicine
  • Vice Chief, Research

    Cary Gross, MD is a Professor of General Internal Medicine and of Epidemiology (Chronic Diseases); Founder and Director, Cancer Outcomes, Public Policy and Effectiveness Research (COPPER) Center, Yale School of Medicine; Program Director, National Clinician Scholars Program at Yale. Associate Editor, JAMA Internal Medicine
  • Vice Chief, Education

    Jeanette Tetrault, MD is a Professor of General Internal Medicine, Program Director, Addiction Medicine Fellowship, Internal Medicine; Co-Director, Addiction Recovery Clinic: Chronic Disease Management/Residency Education Clinic, St. Raphael’s Campus, Internal Medicine; Academic Advisor, Office of Student Affairs; Associate Director for Education and Training, Program in Addiction Medicine, Internal Medicine

Program Directors