Mahr, Claudius
Claudius Mahr, DO

Claudius Mahr, DO

Assistant Professor
Medical Director, Heart Failure, Circulatory Support & Cardiac Transplantation

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(414) 805-6633




  • Advanced Heart Failure and Transplant Cardiology
  • Cardiology

Board Certification

  • Advanced Heart Failure and Transplant Cardiology
  • Cardiology
  • Internal Medicine

Hospital Affiliations

  • Froedtert Hospital

Patient Ages Seen

  • Adult
  • Senior

Languages Spoken

  • English
  • Spanish
  • German

Diseases & Conditions

  • Adult Congenital Heart Disease
  • Cardiogenic Shock
  • Cardiomyopathy
  • Heart Failure
  • Valvular Heart Disease

Treatments & Services

  • Cardiac Biopsy
  • Device Therapy for Heart Failure
  • Heart Transplantation
  • Mechanical Circulatory Support/Ventricular Assist Devices
  • Right Heart Catheterization
  • Women and Heart Disease

Clinic Locations

Cardiovascular Medicine - Froedtert Hospital

9200 West Wisconsin Avenue
Milwaukee WI,  53226
Phone:(414) 805-6000
Fax:(414) 805-8778
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Dr. Mahr is a Board Certified Cardiologist at the Medical College of Wisconsin. He has received formal training in Advanced Heart Failure and Transplant Cardiology and has a wide range of experience in the care of patients with heart failure, assist devices and heart transplantation. Dr. Mahr specializes in the comprehensive, longitudinal care of patients with all etiologies of heart failure and cardiomyopathy, utilizing the latest available medical, surgical and device therapies, including mechanical assist devices (VADs) and heart transplantation. He is an active member of he American College of Cardiology, the Heart Failure Society of America, and the International Society for Heart and Lung Transplantation.

Dr. Mahr's care philosophy is that all patients and families facing these challenging disease processes deserve compassionate, comprehensive, multi-disciplinary, goal-oriented care throughout their lives.

Education / Training
  • Doctor of Osteopathic Medicine - Midwestern University - Downers Grove, IL (0)
  • Residency, Internal Medicine - Northwestern University - Chicago, IL (0)
  • Fellowship, Cardiology - Advocate Healthcare / University of Illinois - Chicago, IL (o)
  • Fellowship, Advanced Heart Failure & Transplant Cardiology - Northwestern University - Chicago, IL (0)
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9200 W. Wisconsin Ave.
Milwaukee, WI 53226