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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 Quertermus:

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  1. Qualifications
  2. What's important to you

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Patient Reviews

Patient comments (9)

The overall average patient rating of Dr. John Quertermus is Excellent. Dr. Quertermus has been reviewed by 25 patients who have provided 9 comments. The rating is 4.5 out of 5 stars.

Patient Ratings
Ease of Appointment 4.2
Promptness 3.8
Courteous Staff 4.4
Accurate Diagnosis 4.1
Bedside Manner 4.4
Spends Time with Me 4.2
Follows Up After Visit 4.0

Specialties & Research

  • He has special expertise in 5 areas:
  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Constipation
  • Hepatitis C
  • Irritable Bowel Syndrome (IBS)
  • Ulcerative Colitis

Education & Awards

Dr. Quertermus graduated from Loyola University Chicago, Maywood. He has 1 awards.

Compassionate Doctor Recognition (2011, 2015)


Dr. Quertermus has 7 hospital affiliations:

  • Bronson Methodist Hospital 
  • Sturgis Hospital 


  • English

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Additional Information
Dr. John F Quertermus MD is a male Internist, has 41 years of experience and practices in Gastroenterology.
Where does Dr. John F. Quertermus practice?
Dr. John Quertermus has 1 office location.
Dr. John Quertermus practices Gastroenterology near Kalamazoo, MI.
See Kalamazoo Gastroenterologists.