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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- Currently 3 of 4 stars
The overall average patient rating of Dr. Mark Johnson is Good.
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Specialties & Research
Dr. Mark Johnson, MD is board certified in Internal Medicine and Gastroenterology.
He has special expertise in 2 Areas, including Gastroenterology and Gastroenterology Internal Medicine.
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Education & Awards
Dr. Johnson graduated from George Washington University.More Education & Awards
Dr. Johnson has 15 hospital affiliations:
- Sharp Memorial Hospital
- Scripps Mercy Hospital San Diego
Accepted Insurance Plans
Dr. Johnson accepts these health insurances in at least one office:
- United Healthcare - 16 plans
- Blue Shield of California - 92 plans
- Great-West Healthcare - 4 plans
- Molina Healthcare - 5 plans
- Unicare - 11 plans
- Care 1st Health Plan - 2 plans
- Anthem Blue Cross - 14 plans
- Humana - 6 plans
- Cigna - 5 plans
- Community Health Group - 3 plans
- USA H & W Network - 1 plan
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