Dr. Glen Tonnessen, MD


Cardiology | Male

Dr. Glen Tonnessen, MD

Dr. Glen Tonnessen, MD is a cardiology doctor who practices in Flemington, NJ. He is 57 years old and has been practicing for 30 years. Dr. Tonnessen is affiliated with Hunterdon Medical Center and Saint Luke's Warren Hospital.

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Dr. Tonnessen's Experience

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Board Certifications

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Conditions Treated

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Languages Spoken

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Memberships & Professional Affiliations

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Visiting Dr. Tonnessen

Dr. Tonnessen accepts 19 insurance carriers

Dr. Tonnessen is now accepting new patients

Affiliated Hospitals

Hospital Quality
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Dr. Tonnessen's Reviews

Likelihood of recommending Dr. Tonnessen to family and friends
based on 10 total reviews (4 with comments)
Dr. Tonnessen's Performance
  • Trustworthiness
  • Explains condition(s) well
  • Answers Questions
  • Time well spent
Office & Staff Performance
  • Scheduling
  • Office environment
  • Staff friendliness
  • Average wait time
    Under 10 minutes
Patient Comments (4)
in franklin, nj |
We were in NJ on vacation and I developed an ulcer on my ankle. Dr. Tonnessen was able to see me quickly. Everyone in the office was professional and friendly. All procedures were explained in a manner easy to understand.
in Stockton, NJ |
I went to see Dr. Tonnessen concerning long-term pain and severe varicosities in both legs (issues that had already been addressed with surgery and hospital stays over 25 years ago). I was doubtful that he could undertake what my legs needed using only in office procedures. Amazingly he was able to address the very serious pain and varicosity issues, even those located very near to my femoral vein (an area that I had previously been told would require a hospital stay). Excellent!
in ringoesJ |
More than a great Doctor , I value the fact that you are an exceptional listener . Your reassuring words helps everyone pull thru . Which is more than being a professional. Your staff's attitude is so exceptional. Thank You For all you do.
in Skillman, NJ |
I have been suffering with a chronic,rare neuropathic condition since 1981, and have seen many Dr's over the years. My G.P. sent me down the path to see cardiologists and maybe get more useful insight, I have not. In fact, I have seen Dr;s who are not familiar with my disease, and who discount my input. I am well educated, but less able to communicate effectively one on one, mostly from the medications I take, but I have taken them knowingly giving up a little for the relief from constant pain.
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Dr. Tonnessen's experience matches your search based on the following criteria:

  •  Based on total number of patients treated over the last 12 months
  •  Specializes in Cardiology
  •  Board certified in Cardiology, Cardiovascular Disease and Internal Medicine
  •  No malpractice claims found
  •  No sanctions found
  •  No board actions found

Awards & Recognition

  • Awards & Honors
    • Healthgrades Honor Roll
    What is a recognized doctor
  • Media & Publications

    Dr. Tonnessen has no media or publications listed.

Background Check

  • 0
    Malpractice Claims

    No malpractice history found for New Jersey.

    What is medical malpractice
  • 0

    No sanctions history found for the years that Healthgrades collects data.

    What is a sanction or disciplinary action
  • 0
    Board Actions

    No board actions found for the years that Healthgrades collects data.

    What are board actions

Board Certifications

Why It Matters: Dr. Tonnessen's Board Certifications

Board certification should be one of your top considerations when choosing a doctor. Board certification is an official recognition given to doctors who have met specific requirements set by national medical specialty boards in the... More

  • Cardiology
  • Cardiovascular Disease
  • Internal Medicine

Conditions Treated

  • Aneurysm
  • Aneurysm of Heart
  • Angina and Acute Coronary Syndrome
  • Aortic Aneurysm
  • Aortic Stenosis
  • Aortic Valve Disease
  • Aortic Valve Regurgitation
  • Arrhythmias
  • Atrial Fibrillation
  • Atrial Flutter
  • Cardiac Arrest
  • Cardiomegaly
  • Cardiomyopathy
  • Cardiovascular Disease
  • Carotid Artery Disease
  • Chest Pain
  • Congenital Aortic Valve Disorders
  • Congenital Heart Defects
  • Congestive Heart Failure
  • Coronary Artery Disease (CAD)
  • Edema
  • Endocarditis
  • Heart Attack (Acute Myocardial Infarction)
  • Heart Disease
  • Heart Palpitations
  • Hyperlipidemia
  • Hypertension
  • Hypertensive Chronic Kidney Disease
  • Hypertensive Heart Disease
  • Hypotension
  • Leg Venous Ulcer
  • Limb Swelling
  • Limb Swelling Caused by Fluid Overload
  • Marfan Syndrome
  • Mitral Valve Disease
  • Mitral Valve Regurgitation
  • Mitral Valve Stenosis
  • Pericardial Disease
  • Peripheral Artery Disease
  • Pulmonary Disease
  • Pulmonary Edema
  • Syncope
  • Thrombosis
  • Tricuspid Valve Disease
  • Varicose Veins
  • Vascular Disease
  • Venous Hypertension
  • Venous Ulcer


  • Medical School
    St George's University

    Graduated in 1987

  • Internship Hospital
    St Michael's Med Center

    Completed in 1988

  • Residency Hospital
    St Michael's Med Center

    Completed in 1990

  • Fellowship Hospital
    Seton Hall University

    Completed in 1993

Languages Spoken

  • English
  • Spanish

Memberships &
Professional Affiliations

Dr. Tonnessen does not have any memberships or affiliations listed. If you are Dr. Tonnessen and would like to add memberships or affiliations, please update your free profile.


  • Cardiology
  • Phlebology

Procedures Performed

  • Ambulatory Phlebectomy
  • Cardiac Electrophysiology
  • Cardiac Imaging
  • Cardiac Myocardial Perfusion Imaging
  • Cardiac Resynchronization Therapy
  • Cardiovascular Stress Test
  • Cardioversion, Elective
  • Chest CT (incl. Heart and Lungs)
  • Endovenous Ablation of Varicose Veins
  • Nuclear Stress Testing
  • Pacemaker Insertion or Replacement
  • Radiofrequency Catheter Ablation
  • Removal or Revision of Pacemaker or Cardioverter and-or Defibrillator
  • Tilt Testing or Cardiac Event Monitors
  • Venous Sclerotherapy