Dr. John Joseph Hayes, MD

Dr. John Hayes is a cardiovascular disease specialist with expertise in internal medicine, bringing four decades of clinical experience to his practice. He earned his medical degree from Rush Medical College of Rush University Medical Center and completed his residency at University of Washington Medical Center. Dr. Hayes speaks both Chinese and Spanish, helping him serve diverse patient communities.

Dr. Hayes practices at multiple Marshfield Clinic locations throughout Wisconsin, including centers in Marshfield, Weston, and Wausau. He also maintains an affiliation with SSM Health Saint Clare Hospital in Baraboo. His focus on cardiovascular disease allows him to help patients manage heart and blood vessel conditions alongside his internal medicine background. Patients consistently rate Dr. Hayes highly for his care, giving him an average rating of 5.0 on Vitals.