Faculty, UW School of Medicine and Public Health

Joshua L. Hermsen, MD

  • Pediatric Cardiothoracic Surgery
  • Pediatric Transplant Surgery
  • Transplant Surgery


Dr. Hermsen is certified by the American Board of Surgery and the American Board of Thoracic Surgery in Adult Cardiothoracic and Congenital (Pediatric) Cardiac Surgery. Dr. Hermsen earned his degree from The Medical University of South Carolina, Charleston, SC, and, after finishing surgery residency at University of Wisconsin Hospital and Clinics, he completed two fellowships at the University of Washington and Seattle Children’s Hospital, Seattle, WA, in adult and pediatric cardiac surgery. After three years on the University of Washington faculty, he returned to Madison to join the UW Health Adult Cardiothoracic and Pediatric Cardiac Surgery teams. His clinical interests include surgery for pediatric and adult congenital heart defects, heart transplantation, circulatory support, and surgery for patients with hypertrophic cardiomyopathy.

Languages spoken
  • English
University affiliation

Practice locations

    Education & credentials

    Board certifications
    • Surgery
    • Thoracic and Cardiac Surgery
    • Congenital Cardiac Surgery
    Medical School
    • Medical University of South Carolina College of Medicine, Charleston, SC

    Cardiothoracic Surgery, University of Washington Medical Center, Seattle, WA

    Congenital Cardiac Surgery, Seattle Children's Hospital, Seattle, WA

    • University of Wisconsin Hospital and Clinics, Madison, WI
    • University of Wisconsin Comprehensive Cancer Center, Madison, WI


    Additional conditions and treatments
    • Fetal Echocardiography
    • Heart Transplant Surgery
    • Left Ventricular Assist Device

    Research and publications

    Dr. Hermsen's research interests include application of 3D printing in surgery for HCM and using simulation to improve training of new cardiothoracic surgeons.