Nathaniel John U. Castro, MD

  • About
    • Specialties: Cardiovascular Surgery Thoracic Surgery Vascular Medicine
    • Board Certified:
      American Board of Thoracic Surgery
    • Gender: Male
    • Languages: English, Filipino, Visaya

    What I Do
    I went into cardiac surgery because it is the most challenging surgical field. If done right, you can extend the lives of patients or give them a better quality of life. I want my patients to know that I will always go the extra mile for them. My clinical interests include adult cardiac surgery and lung cancer.

    Why I Love My Work
    I enjoy my work because patients feel a lot better after cardiac surgery -- for many it’s like comparing night to day.

    Finding Alternatives That Make a Difference in Patient Lives
    Cheryl Redepenning was suffering from nosebleeds as a result of being placed on blood thinners. Unable to get a Watchman device, Dr. Castro was able to recommend another alternative that made an immediate change in her everyday life. Learn more

    Getting to Know Me
    I enjoy the four seasons and the great outdoors in Minnesota. Outside of work, my passions include hiking, photography, reading, cycling, badminton and tennis.


    Coleman Connolly award in thoracic surgery, University of Minnesota, 2011
    Walton Lillehei/Earl Bakken award, Society of Thoracic Surgeons, 2011

    • Medical School
      University of the Philippines College of Medicine, Manila
    • Residency
      General Surgery, State University of New York at Upstate Health Sciences Center, Syracuse, NY
    • Fellowship
      Cardiac and Thoracic Surgery, University of Minnesota, Minneapolis, MN