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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).


Our records indicate this doctor is retired.

Learn more about Dr. John Marshall:

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Specialties & Research

Dr. John Marshall, MD is board certified in Obstetrics & Gynecology.

  • He has special expertise in 2 areas:
  • Hot Flashes
  • Menopause

Education & Awards

Dr. Marshall graduated from University of Pennsylvania , Philadelphia.


Dr. Marshall has 3 hospital affiliations:

  • Los Angeles County - Harbor - UCLA Medical Center 
  • St Joseph`s Hospital Atlanta 
  • Childrens Healthcare at Egleston 

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Additional Information
Dr. John Romney Marshall MD is a male Obstetrician & Gynecologist and practices in Obstetrics & Gynecology.
Where does Dr. John R. Marshall practice?
Dr. John Marshall has 1 office location.
Dr. John Marshall practices Obstetrics & Gynecology near Torrance, CA.
See Torrance Obstetricians & Gynecologists.