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Mayo Clinic has one of the largest and most experienced practices in the United States, with campuses in Arizona, Florida and Minnesota. Staff skilled in dozens of specialties work together to ensure quality care and successful recovery.

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Displaying 1-3 out of 3 doctors available

Last Name Initial: J

  1. Jacob C. Jentzer, M.D.

    Jacob C. Jentzer, M.D.

    1. Internist
    2. Echocardiographer
    3. Critical Care Specialist
    1. Rochester, MN
    Areas of focus:

    Intensive care, Thoracentesis, Endotracheal intubation, Central venous catheterization, Pulmonary vein angioplasty, Sho...ck, Heart attack, Sepsis, Kidney failure, Respiratory failure, Ventricular arrhythmia, Sudden cardiac arrest, Cardiogenic shock, Cardiorenal syndrome, Decompensated heart failure

  2. John Joerns, M.D.

    John Joerns, M.D.

    1. Internist
    2. Critical Care Specialist
    3. Transplant Pulmonologist
    1. Rochester, MN
    Areas of focus:

    Chest tube placement, Thoracentesis, Lumbar puncture, Bronchoscopy, Central venous catheterization, Airway management, ...Advanced lung disease, Transplant rejection, Transplant disorder

  3. Margaret M. Johnson, M.D.

    Margaret M. Johnson, M.D.

    1. Pulmonologist
    2. Critical Care Specialist
    1. Jacksonville, FL
    Areas of focus:

    Bronchoscopy, Pulmonary embolism, Cystic fibrosis, Lung cancer, Bronchiectasis, Nontuberculous mycobacteria lung diseas...e, Asthma attack

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Nov. 20, 2025

Pulmonary Medicine

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