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

Mark Filstein MD PLLC

Organization Internal Medicine Physician · NPI 1679442511

Mark Filstein MD PLLC is an Internal Medicine Physician in Brooklyn, New York. Registered with an NPI since 2025.

In the registry since
2025
What do these letters mean?
PLLC — Professional limited liability company
A form of business registration, not a clinical qualification.

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Practice location Address checks out

2422 Knapp St
Brooklyn, NY 11235-1006
Phone: (718) 934-6777
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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

Record details

NPI number1679442511
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Mark Filstein — Director · (917) 626-5451
NPI enumeratedOctober 30, 2025
Last updated in NPPESOctober 30, 2025
Certification dateOctober 30, 2025
Mailing address2422 Knapp St, Brooklyn, NY 11235-1006

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