John Brennan, MD - Nephrology - Wheaton Franciscan Healthcare

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Patient Rating
4.8 / 5 (Based on 75 Reviews) Read Patient Comments

John Brennan, MD

Specialties: Nephrology


Accepting new patients.


Clinical Interests

  • High Blood Pressure/Hypertension
  • Diabetes Management and Prevention


  • English


  • All Saints


  • Medical School
    1991 University of Health Sciences-Chicago Medical School, Illinois
  • Residency
    1995 Loyola University Medical Center, Maywood, Illinois
  • Fellowship
    1996 Edward Hines Jr VA Hospital, Hines, Illinois


  • Internal Medicine
  • Nephrology

Patient Reviews

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September 26, 2016
Dr. John Brennan has been our Physician for a very long time, and we appreciate him very much........
August 24, 2016
Great ex[erience!
August 22, 2016
have had problems in prior years with coding for Medicare wellness check up which has meant hours on the photo ne and undeserved bills.
July 23, 2016
again, john Brennan is amazing. if I asked your flaws and it was only one Id be impressed.
April 14, 2016
I'm unsure why I need to continue appointments other than to prevent Dr. from getting "dinged". Test results prompting original visit were borderline high. Further treatment precausionary only. Latest test results solidly in normal range. Dr took cellphone call during visit. Listening to lungs at end of visit was "drive-by" at best.
April 04, 2016
great doctor very courtius
January 25, 2016
I have had Dr. Brennan as my primary care doctor for many years. He is an excellent doctor who has always taken the time to answer questions, address my concerns and leave me feeling that I am in good hands. Again, I feel he is a cut above as doctors go.
December 29, 2015
I will be relocating, so will not be able to continue with Dr. Brennan. He has been my Dr. for over 20 years. He's the best! Will miss him dearly.
November 05, 2015
*Dr. Brennan is just super! He is the kindest doctor I have ever met!
November 04, 2015
Very professional & understanding.
November 02, 2015
All good (very good.
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