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Dr. John A. Demask D.O.

We are a small family owned and operated primary care office.

Dr. Demask has lived in the area his entire life and has been practicing in the area for over 25 years. He is board certified by the American Board of Family Medicine.

Demask Family Medical is focused on providing high-quality, patient-centered care efficiently and conveniently. Our staff works together to ensure your time in our waiting room is limited and the time with the provider is thorough.

Our goal is to keep patients healthy with preventive care and the management of chronic diseases including high cholesterol, hypertension and diabetes.


Location & Hours

Dr. John A. Demask D.O.

24724 West Eames St. Channahon, IL 60410

Phone: (815) 467-5100
Fax: (815) 467-7088  

Office Hours

Monday, Tuesday, Wednesday, Friday

  • 8:00 AM - 5:00 PM
  • (Closed 11:30AM-1:00PM For Lunch)

Every Other Saturday

  • 8:00 AM - 12:00 PM
Driving Directions
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