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

Mark Filstein, MD

Individual provider Specialist · NPI 1649396110

Mark Filstein, MD is an Internal Medicine in Brooklyn, New York. Graduated from University of California, San Francisco School of Medicine in 1985, 41 years ago. Practices with Mark Filstein MD PLLC, a 2-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in New York.

Years since qualifying
41
Trained at
University of California, San Francisco School of Medicine
Licensed in
NY
In the registry since
2007
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

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.

Additional practice locations (1)

  • 161 Madison Ave Rm 4e, New York, NY 10016-5461 — (212) 481-4041

Specialties & licences

Specialist (primary) Taxonomy 174400000X · Licence 182093 (NY)

Record details

NPI number1649396110
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMarch 22, 2007
Last updated in NPPESOctober 30, 2025
Certification dateOctober 30, 2025

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF CALIFORNIA, SAN FRANCISCO SCHOOL OF MEDICINE
Graduated 1985 (41 years in practice)
Group practice Mark Filstein Md Pllc — 2 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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