Doctors 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. Find doctors and medical staff: Edit search filters close Narrow your search Doctor's Name, Condition Or Procedure By location Rochester, MN Jacksonville, FL By last name Find a doctor whose last name begins with the letter A A Find a doctor whose last name begins with the letter B B Find a doctor whose last name begins with the letter C C Find a doctor whose last name begins with the letter D D Find a doctor whose last name begins with the letter E E Find a doctor whose last name begins with the letter F F Find a doctor whose last name begins with the letter G G Find a doctor whose last name begins with the letter H H Find a doctor whose last name begins with the letter I I active Find a doctor whose last name begins with the letter J J Find a doctor whose last name begins with the letter K K Find a doctor whose last name begins with the letter L L Find a doctor whose last name begins with the letter M M Find a doctor whose last name begins with the letter N N Find a doctor whose last name begins with the letter O O Find a doctor whose last name begins with the letter P P There are no doctors whose last name begins with the letter Q Q Find a doctor whose last name begins with the letter R R Find a doctor whose last name begins with the letter S S Find a doctor whose last name begins with the letter T T Find a doctor whose last name begins with the letter U U Find a doctor whose last name begins with the letter V V Find a doctor whose last name begins with the letter W W There are no doctors whose last name begins with the letter X X Find a doctor whose last name begins with the letter Y Y Find a doctor whose last name begins with the letter Z Z By conditions treated No results found By procedures performed No results found By spoken language No results found Reset all filters Search Tips Use quotes for phrases. Even if there are no auto-suggestions within the search field, hit "Search" anyway, as you may still get results. Displaying 1-3 out of 3 doctors available Last Name Initial: J Jacob C. Jentzer, M.D. Echocardiographer Internist Critical Care Specialist Rochester, MN Areas of focus: Intensive care, Central venous catheterization, Thoracentesis, Endotracheal intubation, Pulmonary vein angioplasty, Sud...den cardiac arrest, Ventricular arrhythmia, Heart attack, Cardiogenic shock, Sepsis, Respiratory failure, Shock, Kidney failure, Decompensated heart failure, Cardiorenal syndrome Show more areas of focus for Jacob C. Jentzer, M.D. John Joerns, M.D. Internist Critical Care Specialist Transplant Pulmonologist Rochester, MN Areas of focus: Central venous catheterization, Bronchoscopy, Airway management, Chest tube placement, Thoracentesis, Lumbar puncture, ...Transplant disorder, Advanced lung disease, Transplant rejection Show more areas of focus for John Joerns, M.D. Margaret M. Johnson, M.D. Critical Care Specialist Pulmonologist Jacksonville, FL Areas of focus: Bronchoscopy, Cystic fibrosis, Lung cancer, Pulmonary embolism, Bronchiectasis, Nontuberculous mycobacteria lung diseas...e, Asthma attack Show more areas of focus for Margaret M. Johnson, M.D. Request an appointment Conditions treatedSpecialty groups June 19, 2024 Share on: FacebookTwitter Pulmonary MedicineDepartmenthomeSectionsOverviewTests & proceduresConditions treatedDoctorsSpecialty groupsExpertise & rankingsClinical trialsResearchPatient storiesCosts & insuranceNews from Mayo ClinicReferrals SectionsRequest an AppointmentOverviewTests & proceduresConditions treatedDoctorsSpecialty groupsExpertise & rankingsClinical trialsResearchPatient storiesCosts & insuranceNews from Mayo ClinicReferrals ORG-20397842 Medical Departments & Centers Pulmonary Medicine