Reviews reflect patients' level of satisfaction with the care they received from this provider. Dr. John Brennan xhas an overall rating of 1.0.
Dr. John Brennan, MD is a Doctor primarily located in Sparta, WI. His specialties include Emergency Medicine and Internal Medicine. Dr. Brennan is affiliated with Mayo Clinic Health System Sparta. He speaks English.
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Specialties & Expertise
Dr. John Brennan has the following 3 areas of expertise, 2 specialties and 1 board certification.
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Locations & Directions
Dr. John Brennan, MD is similar to these 3 Doctors near Sparta, WI.
Dr. Emma Ledbetter
Dr. Milton Mcmillen
Dr. Ward Brown