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. Douglas Johnson, MD is board certified in Internal Medicine and Nephrology.
Education & Awards
Dr. Johnson graduated from Indiana University , Indianapolis.
Dr. Johnson has 14 hospital affiliations:
- Sacred Heart Hospital/Allentown
- Lehigh Valley Hospital - Muhlenberg