Patient Reviews

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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Locations & Directions

Mayo Clinic Health System Sparta

310 W Main St
Sparta, WI 54656

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