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Internist, Gastroenterologist (digestive)
38 years of experience
Accepting new patients
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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  1. Qualifications
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Patient Reviews

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The overall average patient rating of Dr. John Walker is Average. Dr. Walker has been reviewed by 2 patients who have provided 0 comments. The rating is 3 out of 5 stars.

Specialties & Research

Dr. John Walker, 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. Walker graduated from The University of Texas Southwestern, Dallas.


Dr. Walker has 3 hospital affiliations:

  • Providence Medford Medical Center 
  • Rogue Valley Medical Center 
  • Medford 


  • Spanish

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Additional Information
Dr. John Allan Walker MD is a male Internist, has 38 years of experience and practices in Internal Medicine and Gastroenterology.
Where does Dr. John A. Walker practice?
Dr. John Walker has 1 office location.
Dr. John Walker practices Internal Medicine and Gastroenterology near Medford, OR.
See Medford Internists and Medford Gastroenterologists.