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.) and Obstetrics & Gynecology.
- He has special expertise in 15 areas:
- Birth Defects or Abnormalities (Congenital Abnormalities)
- Chromosome Aberrations
- Down Syndrome
- Fetal Diseases
- Hot Flashes
- Hydrops Fetalis
- Multiple Abnormalities
- Neural Tube Defects
- Pregnancy Complications
- Pregnancy in Diabetics
- Premature Labor
- Urogenital Abnormalities
Education & Awards
Dr. Johnson graduated from University of Minnesota, Twin Cities, Minneapolis. He has 2 awards.
Dr. Johnson has 3 hospital affiliations:
- Hospital of the University of PA
- Children's Hospital of Philadelphia
- PA Hospital of The University of PA Health System
Accepted Insurance Plans
Dr. Johnson accepts these health insurances in at least one office:
- United Healthcare - 2 plans
- Highmark Blue Cross Blue Shield - 2 plans
- Oxford Health Plans - 2 plans
- Humana - 2 plans
- Aetna - 3 plans
- Horizon Blue Cross Blue Shield of New Jersey - 15 plans
Similar doctors nearby
- Additional Information
- Where does Dr. Mark P. Johnson practice?
Dr. Mark Johnson practices Obstetrics & Gynecology, Maternal & Fetal Medicine, Clinical Genetics, and M.D. near King Of Prussia, PA.
Additional practice locations include: Exton, PA and Chalfont, PA.
See King Of Prussia Obstetricians & Gynecologists and King Of Prussia Geneticists.