Mark H. Schoenfeld, MD


Cardiovascular Disease, Clinical Cardiac Electrophysiology

Conditions & Treatments

Atrial Fibrillation, Cardiac Arrhythmia, Cardiac Defibrillator, Cardiomyopathy, Catheter Ablation, Electrophysiologic Studies, Pacemaker, Syncope, Ventricular Tachycardia (VT)

(203) 789-3363
Accepting New Patients


As a cardiologist and cardiac electrophysiologist, Mark Schoenfeld, MD, diagnoses and manages heart rhythm disorders and fainting (syncope). In order to do this, he performs diagnostic electrophysiology studies (EPS) to determine abnormal electrical activity in the heart.

 “I treat a range of cardiac disturbances, from the most benign to those that are potentially life-threatening,” Dr. Schoenfeld says.

 Based on the rhythm disturbance that he identifies, he may perform cardiac ablation or implantation of a pacemaker or implantable cardioverter defibrillator to manage a patient’s heart rhythm disturbance.

 He helped pioneer the field of cardiac electrophysiology almost four decades ago and has dedicated his work to caring for patients with irregular heart rhythms.

 “Using cardiac ablation, we can actually cure patients of certain arrhythmias and alleviate their symptoms,” Dr. Schoenfeld says. “This is gratifying since there are very few medical conditions that can actually be cured. In the case of more serious rhythm disturbances, pacemakers and defibrillators may save patients’ lives.”

 “But, in the end, the most rewarding part of my job is interacting with patients and working together to identify, address, and manage their medical and cardiac conditions,” he says.

 His research focuses on improving pacemaker and defibrillator device therapy, as well as improving the ability to remotely monitor these devices. He has established international guidelines for practitioners and the U.S. government on the optimal ways of managing patients with cardiac rhythm disturbances.





Years In Practice


Affiliated With

Yale Medicine


Yale Heart and Vascular Center

175 Sherman Ave
2nd Floor
New Haven, CT 06511

Get Directions

Monday9:00 AM - 5:00 PM
Tuesday9:00 AM - 5:00 PM
Wednesday9:00 AM - 5:00 PM
Thursday9:00 AM - 5:00 PM
Friday9:00 AM - 5:00 PM
(203) 789-4081

Yale Cardiology

56 Franklin Street
Waterbury, CT 06702

Get Directions

Monday9:00 AM - 5:00 PM
Tuesday9:00 AM - 5:00 PM
Wednesday9:00 AM - 5:00 PM
Thursday9:00 AM - 5:00 PM
Friday9:00 AM - 5:00 PM
(203) 789-4081

Education & Training


Harvard Medical School


Massachusetts General Hospital


Massachusetts General Hospital


Massachusetts General Hospital

Accepted Insurance

Insurance coverage regularly changes, please contact the doctor’s office directly to verify that your specific insurance plan is accepted.

  • aetna
  • anthem bc/bs
  • berkeley care network
  • cigna healthcare
  • community care network
  • connecticare
  • corvel
  • first health network
  • focus healthcare
  • great west
  • husky
  • medicaid
  • medicare
  • multiplan
  • oxford health plans
  • railroad medicare
  • tricare/champus
  • united healthcare
  • us family health plan
  • wellcare