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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).

Learn more about Dr. Mark Johnson:

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Specialties & Research

Dr. Mark Johnson, MD is board certified in Clinical Genetics (M.D.).

  • He has special expertise in 6 areas:
  • Amaurosis Fugax
  • Aneurysm
  • Carotid Stenosis
  • Moyamoya Disease
  • Retinal Artery Occlusion
  • Stroke

Education & Awards

Dr. Johnson graduated from Universidad Central Del Caribe, Bayamon. He has 10 awards.

Selected by faculty in residency program (96)
Employee Recognition Program (2006)
Resident Award for Excellence in Teaching (2005)
American Academy of Neurology Scholarship for Residents
Since medical school cum laude graduation (92)
Stroke Voluntee Award (2007)
Gold Level of service PACT (2006)
American Academy of Neurology Scholarship for Residents (96)
Trephined Cranium Award (2005)
Alpha Omega Alpha (92)


Dr. Johnson has 7 hospital affiliations:

  • UT Southwestern University Hospital - Zale Lipshy 
  • UT Southwestern University Hospital - St. Paul 

> > > > Dr. Mark Johnson, MD

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Additional Information
Dr. Mark Douglas Johnson MD is a male Medical Geneticist, has 20 years of experience and practices in Pediatrics, Clinical Genetics, and M.D..
Where does Dr. Mark D. Johnson practice?
Dr. Mark Johnson has 1 office location.
Dr. Mark Johnson practices Pediatrics, Clinical Genetics, and M.D. near Dallas, TX.
See Dallas Pediatricians and Dallas Geneticists.