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

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

Thomas A. Dewland, MD

Cardiology • Cardiology (Electrophysiology)
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 School of Medicine -GME
  • Cardiology, UCSF School of Medicine -GME

Residency

  • Internal Medicine, UCSF School of Medicine -GME

Internship

  • Internal Medicine, UCSF School of Medicine -GME

Degree

  • MD, Yale University School of Medicine

Academic title

  • Clinical Professor

Locations

    Reviews

    Average rating

    4.9
    4.9 out of 5 Stars
    227 ratings
    About provider reviews

    Showing 1-6 of 57 reviews

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    • 5 out of 5 Stars
      August 22, 2026

      Dr. Dewland is a true expert and his genuine care is always there too. What a wonderful cardiologist.

    • 5 out of 5 Stars
      August 7, 2026

      Dr Dewland & his staff were all fantastic

    • 5 out of 5 Stars
      July 11, 2026

      Very good experience overall

    • 5 out of 5 Stars
      July 11, 2026

      Dr. Dewland lhas a unique ability to involve the patient in a way that they understand the matter before them ,explain its implications and involve them in deciding the most reasonable path forward. I cannot remember a more positive interaction with a physician that included my involvement.

    • 5 out of 5 Stars
      July 11, 2026

      Perfect

    • 5 out of 5 Stars
      May 19, 2026

      Very easy to talk to, informative, and made sure I understood everything he was talking about. Very nice doctor. Very pleased!!

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