Portrait of Thomas A. Dewland
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Thomas A. Dewland, MD

Electrophysiology • Cardiology
Cardiology Parnassus
415-353-2873
Portrait of Thomas A. Dewland
Portrait of Thomas A. Dewland
ucsf logo

Thomas A. Dewland, MD

Electrophysiology • Cardiology
Cardiology Parnassus
415-353-2873

On this page

About me

Dr. Thomas A. Dewland is a cardiologist with particular expertise in electrophysiology, the study of the heart's electrical activity. He cares for patients with arrhythmias (heart rhythm problems) in both the clinic and the hospital. Among other treatments, he performs catheter ablation (in which a flexible tube called a catheter is threaded through a blood vessel to reach the heart and destroy the tissue causing an arrhythmia), pacemaker implantation, implantable cardioverter defibrillator placement and left atrial appendage closure (sealing the heart sac where blood clots form to help prevent stroke in patients with the heart rate irregularity called atrial fibrillation).

In research, Dewland focuses on atrial fibrillation epidemiology (the study of which populations are affected by certain diseases and why). His goal is to identify ways to prevent atrial fibrillation before it occurs.

Dewland earned his medical degree at the Yale School of Medicine. At UCSF, he completed a residency in internal medicine, a fellowship in cardiology and a fellowship in cardiac electrophysiology, as well as the Advanced Training in Clinical Research Certificate Program.

Outside of work, Dewland enjoys spending time with his wife – a pediatrician at UCSF – and their two children.

Education & training

Board certification

  • Clinical Cardiac Electrophysiology, American Board of Internal Medicine

Fellowship

  • Cardiac Electrophysiology, UCSF Graduate Medical Education
  • Cardiology, UCSF Graduate Medical Education

Residency

  • Internal Medicine, UCSF Graduate Medical Education

Internship

  • Internal Medicine, UCSF Graduate Medical Education

Degree

  • MD, Yale University School of Medicine

My expertise

Locations

    Reviews

    Average rating

    4.9
    4.9 out of 5 Stars
    238 ratings
    About provider reviews

    Showing 1-6 of 39 reviews

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    • 5 out of 5 Stars
      December 8, 2025

      Thomas Dewland is fantastic as a doctor. Friendly, knowledgeable, listens and answers questions, and has relevant information from UCSF research for my condition.

    • 5 out of 5 Stars
      November 7, 2025

      The Cardiology staff has been great

    • 5 out of 5 Stars
      November 4, 2025

      I was very impressed with the communications process before and during my appointment. Dr. Dewland stood out for his pleasant demeanor, helpful nature, and careful attentiveness to my needs. I also found the appointment reminders quite useful.

    • 5 out of 5 Stars
      September 30, 2025

      Dr. Dewland was terrific.

    • 5 out of 5 Stars
      September 26, 2025

      Dr. Dewland is a smart, compassionate and excellent communicator. I appreciate his candor and honesty. I hoped the news would have been different, but as a physician myself, I know that speaking the truth has always been my own guiding light.

    • 5 out of 5 Stars
      September 18, 2025

      Very personable, friendly and patient. Listens well and asks questions for clarification. Involved me in the treatment options and Considered my point of view. His professional manner gave me confidence in the proposed treatment.

    Please check with your health insurance plan regarding coverage for this type of care. Not all providers at UCSF Health are covered by every insurance plan.

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