Browse Health
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).

Patient Reviews

Patient comments (2)

The overall average patient rating of Dr. John Kniaz is Excellent. Dr. Kniaz has been reviewed by 6 patients who have provided 2 comments. The rating is 4.5 out of 5 stars.

Patient Ratings
Ease of Appointment 5.0
Promptness 4.6
Courteous Staff 5.0
Accurate Diagnosis 5.0
Bedside Manner 5.0
Spends Time with Me 5.0
Follows Up After Visit 4.6

Specialties & Research

  • He has special expertise in 7 areas:
  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Colonoscopy
  • Constipation
  • Gastroscopy
  • Hepatitis C
  • Irritable Bowel Syndrome (IBS)
  • Ulcerative Colitis

Education & Awards

Dr. Kniaz graduated from Philadelphia College of Osteopathic Medicine.


Dr. Kniaz has 20 hospital affiliations:

  • Illiana Surgery & Medical Center Llc 
  • Community Hospital 


  • English

Similar doctors nearby

Dr. Praveen Nallapareddy

Munster, IN

Dr. Joel Cahan

Internal Medicine
29 years experience
Munster, IN

Dr. David Herbstman

30 years experience
Munster, IN

Dr. Mark Efrusy

41 years experience
Munster, IN

Dr. James Monks

39 years experience
Munster, IN

Dr. Carol Noetzel

Internal Medicine
33 years experience
Munster, IN
Search All Similar Doctors
Additional Information
Dr. John Kniaz DO is a male Internist, has 39 years of experience and practices in Gastroenterology.
Where does Dr. John Kniaz practice?
Dr. John Kniaz has 1 office location.
Dr. John Kniaz practices Gastroenterology near Munster, IN.
See Munster Gastroenterologists.