Skip to navigation Skip to Content
“I strive to put patients at ease, listen to their problems and provide individualized options that work for them.” ​
John J Hayes MD FACC4.9
Learn about our ratings
Marshfield Center

1000 N Oak Ave
Marshfield, WI 54449

Also sees patients at:
Weston Center

Appointment Phone:

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.

  • 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

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

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

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

    State Licenses

    Make a patient referral >