Internist, Gastroenterologist (digestive)
37 years of experience
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).

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Specialties & Research

Dr. John Jendrzejewski, MD is board certified in Internal Medicine and Gastroenterology.

  • 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. Jendrzejewski graduated from Oregon Health & Science University, Portland.


Dr. Jendrzejewski has 2 hospital affiliations:

  • Providence St Vincent Medical Center 
  • Legacy Meridian Park Hospital 

> > > > Dr. John Jendrzejewski, MD

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Additional Information
Dr. John Walter Jendrzejewski MD is a male Internist, has 37 years of experience and practices in Internal Medicine and Gastroenterology.
Where does Dr. John W. Jendrzejewski practice?
Dr. John Jendrzejewski has 1 office location.
Dr. John Jendrzejewski practices Internal Medicine and Gastroenterology near Portland, OR.
See Portland Internists and Portland Gastroenterologists.