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Siegfried, Jonathan S., MD, FACC, FSCAI





Providing the best care to our patients and their companions requires communicating in a way everyone understands. Interpreter services are available 24 hours a day, 7 days a week, 365 days a year. All spoken languages are available, as well as American Sign Language (AS/L).

Accepting New Patients

Interventional Cardiology


Not Currently Accepting New Patients

Cardiovascular Medicine

Internal Medicine

Areas of Expertise
Hypertension, Non-Invasive Cardiovascular Medicine, Preventive Cardiology, Transradial PCI, Valvular Heart Disease


Lenox Hill Hospital

Medical School
New York University School of Medicine

New York University School of Medicine

Professional Organizations

  • American College of Cardiology, Fellow
  • Society for Cardiovascular Angiography and Interventions, Fellow


Verified Patient Reviews

5 out of 5 stars

All my questions were answered.

5 out of 5 stars

Could not be better

Other Reviews from Around the Web

5 out of 5 stars

I like Dr. Siegfried. Always willing to listen and takes your concerns seriously.

5 out of 5 stars

I had a very good experience everyone there is so nice


Aetna, Anthem, BCBS Medicare, CarePartners of Connecticut, Cigna Healthcare, Colonial Cooperative Care, Community Health Network of Connecticut, Inc., Connecticare, Connecticare Commercial, Connecticare Medicare, Corvel, Coventry, Essence Healthcare, Evercare, First Health Group Corp., Focus, Harvard Pilgrim, Health Connecticut, Health Direct, Health New England, Healthy Connecticut, Multiplan, Northeast Health Direct, One Health Plan/ Great-West Healthcare, Oxford Health Plans, Prime Health Services, Private Health Care Systems, Inc., Senior Whole Health, United Healthcare, WellCare of Connecticut, Inc.

This information is subject to change at any time. Please check with your insurance provider before scheduling your appointment or receiving services to confirm they are a participating member of the Hartford HealthCare network.