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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. 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 


  • Spanish

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Additional Information
Dr. Douglas Emil Johnson MD is a male Internist, has 39 years of experience and practices in Internal Medicine and Nephrology.
Where does Dr. Douglas E. Johnson practice?
Dr. Douglas Johnson has 7 office locations.
Dr. Douglas Johnson practices Internal Medicine and Nephrology near Allentown, PA.
Additional practice locations include: Kutztown, PA and Sellersville, PA.
See Allentown Internists and Allentown Nephrologists.