Mark Filstein MD PLLC
NPI 1679442511 · Internal Medicine Physician · Brooklyn, NY
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Filstein MD PLLC is a Internal Medicine Physician organization in Brooklyn, NY (NPI 1679442511).
Provider details
- NPI number
- 1679442511
- Entity type
- Organization
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Mark Filstein, Director(917) 626-5451
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
Under 1 yr in registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2025-10-30
- Last updated
- 2025-10-30
- Certified
- 2025-10-30
Frequently asked questions
- What is Mark Filstein MD PLLC's NPI number?
- Mark Filstein MD PLLC's National Provider Identifier (NPI) is 1679442511, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Mark Filstein MD PLLC?
- Mark Filstein MD PLLC is classified in the NPPES registry as Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Filstein MD PLLC located?
- Mark Filstein MD PLLC's practice location on file with NPPES is 2422 Knapp St, Brooklyn, NY 11235-1006.
- What is Mark Filstein MD PLLC's phone number?
- The practice phone number listed in the NPPES registry for Mark Filstein MD PLLC is (718) 934-6777.
- Does Mark Filstein MD PLLC accept Medicare?
- Mark Filstein MD PLLC is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Mark Filstein MD PLLC?
- The authorized official listed on Mark Filstein MD PLLC's NPPES record is Mark Filstein, Director. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Mark Filstein MD PLLC's NPI active?
- Yes — Mark Filstein MD PLLC's NPI (1679442511) is active in the NPPES registry as of the last update on 2025-10-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.