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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The overall average patient rating of Dr. David Johnson is Excellent.
Specialties & Research
Dr. David Johnson, MD is board certified in Internal Medicine and Gastroenterology.
- He has special expertise in 5 areas:
- Acid Reflux Disease (Gastroesophageal Reflux / GERD)
- Hepatitis C
- Irritable Bowel Syndrome (IBS)
- Ulcerative Colitis
Education & Awards
Dr. Johnson graduated from Loyola University Chicago, Maywood.
Dr. Johnson has 1 hospital affiliations:
- Carl T. Hayden Veterans Affairs Medical Center
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- Additional Information
- Dr. David Andrew Johnson MD is a male Internist, has 39 years of experience and practices in Internal Medicine and Gastroenterology.
- Where does Dr. David A. Johnson practice?
- Dr. David Johnson has 1 office location.
Dr. David Johnson practices Internal Medicine and Gastroenterology near Phoenix, AZ.
See Phoenix Internists and Phoenix Gastroenterologists.