Skip to navigation Skip to Content

John J Hayes MD FACC


Marshfield Center
Also sees patients at: Weston Center

“I strive to put patients at ease, listen to their problems and provide individualized options that work for them.”

Request an appointment
  • Primary Location


    1000 N OAK AVE
    MARSHFIELD, WI 54449

  • Appointment Phone

  • Other Specialties

    Cardiology - Electrophysiology

Additional Information

  • Professional Societies

    American College of Cardiology North American Society of Pacing & Electrophysiology Wisconsin Medical Society

    Board Certifications

    Cardiovascular Disease: 1991, recertified 2001 Clinical Cardiac Electrophysiology: 1992, recertified 2002 Internal Medicine: 1988

    State Licenses

  • Education

    Medical School:
    Rush University Medical Center - Rush Medical College, Chicago, IL, United States, M.D., 1985

    Mayo School of Graduate Medical Education, Rochester, MN, United States, Internal Medicine, 1988

    University of Washington - School of Medicine, Seattle, WA, United States, Cardiology, 1991

    Hospital/Clinic/Faculty Appointments

    Clinical Associate Professor, Department of Medicine-University of Wisconsin School of Medicine and Public Health, Madison, WI

Provider Bio

Dr. John Hayes concentrates his cardiology practice on diagnosing and treating patients with heart rhythm disturbances. “It’s a pleasure to provide people with quality care and improve their health,” he said.

He came to Marshfield Clinic in 1991, attracted by its high-quality practice, the community’s family-oriented environment and positive feedback from patients who had been referred to Mayo Clinic during his residency there.

Dr. Hayes earned his medical degree at Rush University Medical Center-Rush Medical College, Chicago. He completed his residency in internal medicine at the Mayo School of Graduate Medical Education, Rochester, Minnesota; and a fellowship in cardiology and electrophysiology at the University of Washington, Seattle.

Dr. Hayes is board-certified in internal medicine, cardiovascular disease and clinical cardiac electrophysiology, and is a Fellow of the American College of Cardiology and the Heart Rhythm Society. He also serves as a clinical associate professor at the University of Wisconsin School of Medicine and Public Health, Madison.

He and his wife have three children. He enjoys fitness activities such as running, bicycling and basketball.