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License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Learn more about Dr. John Demask:

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  1. Qualifications
  2. What's important to you

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Patient Reviews

Patient comments (6)

The overall average patient rating of Dr. John Demask is Excellent. Dr. Demask has been reviewed by 23 patients who have provided 6 comments. The rating is 5 out of 5 stars.

Patient Ratings
Ease of Appointment 5.0
Promptness 4.9
Courteous Staff 5.0
Accurate Diagnosis 4.9
Bedside Manner 5.0
Spends Time with Me 5.0
Follows Up After Visit 5.0

Specialties & Research

Dr. John Demask, DO is board certified in Family Medicine.

  • He has special expertise in 1 area:
  • Diabetes

Education & Awards

Dr. Demask graduated from Midwestern University, Downers Grove. He has 3 awards.

Patients' Choice Award (2010 - 2012, 2014 - 2015)
Compassionate Doctor Recognition (2011 - 2012, 2014 - 2015)
On-Time Doctor Award (2014 - 2015)


Dr. Demask has 1 hospital affiliations:

  • Morris Hospital 


  • Spanish

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Additional Information
Dr. John Demask DO is a male Family Practitioner, has 19 years of experience and practices in Family Medicine.
Where does Dr. John Demask practice?
Dr. John Demask has 1 office location.
Dr. John Demask practices Family Medicine near Minooka, IL.
See Minooka Primary Care Doctors.