Dr. Joan Gnadt, MD

Dr. Joan Gnadt, MD

Cardiology  ·  
Dr. Joan Gnadt, MD is a cardiology specialist in Mequon, WI and has been practicing for 36 years. She graduated from MED COLL OF WI in 1976 and specializes in cardiology, interventional cardiology, and more.

13133 N Port Washington Rd Ste 111

Mequon, WI 53097

Contact Information

(262) 243-6000

Insurance Accepted

  • AARP
  • Aetna
  • American Enterprise Group
  • American Republic
  • Anthem Blue Cross Blue Shield
  • Assurant Health
  • Blue Cross Blue Shield
  • Cigna
  • Commercial Insurance Company
  • 15 More

*Please verify this information when scheduling an appointment.

Learn about Dr. Gnadt

Be confident in your decisions by checking out your provider's top areas of care, education, patient reviews and more. Learn about finding the right doctor for you.

Top Care Areas

See how frequently Dr. Gnadt performs your care needs compared to other doctors.

Heart Disease
more than 74% of peers
Vascular Disease
more than 72% of peers
Coronary Artery Disease (CAD)
more than 69% of peers

Dr. Gnadt's percentages are based on the rate of treatment compared to peers nationwide from insurance data. Learn more info about our data and this Top Care Areas component.

4  Specialties

  • Cardiology
  • Geriatric Cardiology
  • Internal Medicine
  • Interventional Cardiology

2  Board Certifications

  • Cardiovascular Disease
    Accredited by: American Board of Internal Medicine*
  • Internal Medicine
    Accredited by: American Board of Internal Medicine*

46  Conditions Treated

  • Aneurysm
  • Aneurysm of Heart
  • Angina and Acute Coronary Syndrome
  • Aortic Stenosis
  • Aortic Valve Disease
  • Aortic Valve Regurgitation
  • Arrhythmias
  • Atrial Fibrillation
  • Atrial Flutter
  • Benign Tumor
  • Cardiomegaly
  • Cardiomyopathy
  • Carotid Artery Disease
  • Chest Pain
  • Chronic Pulmonary Heart Diseases (incl. Pulmonary Hypertension)
  • Congenital Heart Defects
  • Congenital Heart Disease
  • Congestive Heart Failure
  • Coronary Artery Disease (CAD)
  • Endocarditis
  • Heart Attack (Acute Myocardial Infarction)
  • Heart Disease
  • Heart Murmur
  • Heart Palpitations
  • Heart Tumors, Benign
  • Hyperlipidemia
  • Hypertension
  • Hypertensive Chronic Kidney Disease
  • Hypertensive Heart and Chronic Kidney Disease
  • Hypertensive Heart Disease
  • Hypotension
  • Limb Swelling
  • Limb Swelling Caused by Fluid Overload
  • Mitral Valve Disease
  • Mitral Valve Regurgitation
  • Mitral Valve Stenosis
  • Pericardial Disease
  • Primary Pulmonary Hypertension
  • Pulmonary Disease
  • Pulmonary Hypertension
  • Pulmonary Valve Disease
  • Septal Defect
  • Syncope
  • Thrombosis
  • Tricuspid Valve Disease
  • Vascular Disease


Read Less

18  Procedures

Background Check

Malpractice Claims not available

Healthgrades does not collect malpractice information for Wisconsin.

0 Sanctions

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

0 Board Actions

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


  • Marquette University / College of Health Sciences
    Undergraduate School | Graduated
  • U Wisc Milwaukee
    Undergraduate School | Graduated 1975
    Medical School | Graduated 1976
  • UC Davis-Martinez VA Med Ct
    Internship Hospital | Completed 1978
  • UC Davis-Martinez VA Med Ct
    Residency Hospital | Completed 1980
  • UC Davis-Martinez VA Med Ct
    Fellowship Hospital | Completed 1982

Awards & Recognition

Awards & Honors
  • Healthgrades Honor Roll
Media & Publications

Dr. Gnadt has no media or publications listed.

Languages Spoken

  • English

Memberships & Professional Affiliations

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

Dr. Gnadt's Reviews

Likelihood of recommending Dr. Gnadt to family and friends
2 total reviews

Likelihood to Recommend (2)

  • 5
  • 4
  • 3
  • 2
  • 1

Dr. Gnadt'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
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