University of Nebraska Medical Center

John Y. Um, MD, FACS, FACC

Associate Professor, UNMC Department of Surgery, Division of Cardiothoracic Surgery
Surgical Director, Cardiac Transplant & Mechanical Circulatory Support Program, Nebraska Medicine

John Y. Um, MD, FACS, FACC


Dr. Um is a heart surgeon with an interest in heart failure. He focuses on conventional operations to prevent or repair the failing heart heart. He also has an interest in the supporting the failed heart with mechanical devices or replacement with transplantation. He is an associate professor in the division of Cardiothoracic Surgery at UNMC.

Dr. Um is a graduate from Brown University School of Medicine, Providence, Rhode Island. He completed his general surgery residency at the University of Medicine and Dentistry New Jersey in New Brunswick. He completed his cardiothoracic surgery residency at the University of California San Francisco. Dr. Um also completed a fellowship in thoracic transplantation and mechanical assist devices at Duke University School of Medicine in Durham, North Carolina. He is board certified in general and thoracic surgery and practices adult cardiac surgery at UNMC.

  • MD: Brown University School of Medicine
  • Residency: General surgery, University of Medicine and Dentistry of New Jersey, Robert Wood Johnson Medical School
  • Residency: Cardiothoracic surgery, University of California, San Francisco
  • Fellowship: Thoracic transplantation and mechanical assist devices, Duke University School of Medicine
Board Certifications
  • American Board of Thoracic Surgery
  • American Board of Surgery
Research Interests
  • Strategies for myocardial recovery
  • Techniques for improving outcomes of heart transplantation