Photo of Leon M. Ptaszek, MD, PhD

Leon M. Ptaszek, MD, PhD


Accepting New Patients





Centers & Specialties

Heart Center

Clinical Interests
  • Treatment of cardiac arrhythmias
  • Catheter ablation of supraventricular tachycardias
  • Pacemaker therapy
  • Implanted cardioverter defibrillator (ICD) therapy
  • Cardiac resynchronization therapy
Medical Education
  • MD, PhD, Mount Sinai School of Medicine
  • Residency, Stanford University Medical Center
  • Fellowship, Massachusetts General Hospital
Board Certifications
  • Internal Medicine
  • Cardiovascular Disease
  • Clinical Cardiac Electrophysiology
  • Boston: Massachusetts General Hospital
Insurances Accepted
  • Aetna Health Inc.
  • AllWays Health (NHP) - ACD
  • AllWays Health (NHP) - PBO
  • Beech Street
  • Blue Cross Blue Shield - Blue Care 65
  • Blue Cross Blue Shield - Indemnity
  • Blue Cross Blue Shield - Managed Care
  • Blue Cross Blue Shield - Partners Plus
  • BMC HealthNet Mass Health MCO/ACO
  • Cigna (PAL #'s)
  • Commonwealth Care Alliance
  • Fallon Community HealthCare
  • Great-West Healthcare (formally One Health Plan)
  • Harvard Pilgrim Health Plan - ACD
  • Harvard Pilgrim Health Plan - PBO
  • Health Care Value Management (HCVM)
  • Humana/Choice Care PPO
  • Maine Community Health Options (MCHO)
  • MassHealth
  • Medicare
  • Medicare - ACD
  • OSW - Connecticut
  • OSW - Maine
  • OSW - New Hampshire
  • OSW - Rhode Island
  • OSW - Vermont
  • Private Health Care Systems (PHCS)
  • Railroad Medicare
  • Senior Whole Health
  • TriCare
  • Tufts Health Plan
  • Unicare
  • United Healthcare (non-HMO) - ACD
  • United Healthcare (non-HMO) - PBO
  • Well Sense Pediatrics

Note: This provider may accept more insurance plans than shown; please call the practice to find out if your plan is accepted.

Patient Age Group
Provider Gender


Dr. Ptaszek received his M.D. and Ph.D. degrees from the Mount Sinai School of Medicine.  He completed his internal medicine residency training at the Stanford University School of Medicine, and then completed fellowships in cardiology and clinical cardiac electrophysiology at the Massachusetts General Hospital.  He is board certified in internal medicine, cardiovascular diseases, and clinical cardiac electrophysiology.  Dr. Ptaszek is an Assistant Professor of Medicine at Harvard Medical School and MGH. 


His clinical interests focus on the management of patients with heart rhythm disorders. Dr. Ptaszek performs catheter ablations of supraventricular tachycardias (SVTs) and premature ventricular contractions (PVCs). He also implants pacemakers, implantable cardioverter-defibrillators (ICDs), and cardiac resynchronization therapy (CRT) devices. His research interests include the development of novel ablation catheters and high-resolution arrhythmia mapping systems.


Research & Publications


View my most recent publications at PubMed

News & Events

  • Compassionate care for sexual abuse victims

    Holly Pritchard is a wife, a mother of two boys, a librarian and a volunteer at her church. “I want people to know that hope is alive at Mass General for every survivor of sexual abuse who may need compassionate medical treatment.”


Electrophysiology Lab/Arrhythmia Service
55 Fruit Street
Boston, MA 02114-2696
Phone 1: 617-643-4017
Phone 2: 617-726-9292
Fax: 617-724-6747

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