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

Individual provider Internal Medicine Physician · NPI 1801849658

Dr. Mark Gelfand, MD is an Internal Medicine in Brooklyn, New York. Qualified in 1986, 40 years ago. Accepts Medicare assignment and offers telehealth. Licensed in New York.

Years since qualifying
40
Licensed in
NY
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

415 Oceanview Ave
Brooklyn, NY 11235
Phone: (718) 934-4842
Fax: (718) 616-0165
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 211150 (NY)

Record details

NPI number1801849658
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 19, 2006
Last updated in NPPESJuly 13, 2026

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1986 (40 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

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