Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Ron S Gejman, MD, PHD

Individual provider Internal Medicine Physician · NPI 1811523848

Dr. Ron S Gejman, MD, PHD is a Medical Oncology in New York, New York. Qualified in 2020, 6 years ago. Practices as a sole proprietor. Licensed in New York.

Years since qualifying
6
Licensed in
NY
In the registry since
2020
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

177 Fort Washington Ave Mhb 6GN-435
New York, NY 10032-3733
Phone: (212) 305-8923
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Medical Oncology Physician (primary) Taxonomy 207RX0202X · Licence 323560 (NY)
Internal Medicine Physician Taxonomy 207R00000X · Licence 323560 (NY)

Record details

NPI number1811523848
Entity typeIndividual (Type 1)
GenderMale
Credentials MD , PHD
Sole proprietorYes
NPI enumeratedMarch 21, 2020
Last updated in NPPESApril 30, 2026
Certification dateApril 30, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyMEDICAL ONCOLOGY
Medical schoolOTHER
Graduated 2020 (6 years in practice)
Accepts Medicare assignment Not indicated

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