Mark Filstein MD PLLC

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

Legal business name

MARK FILSTEIN MD PLLC

Practice address

2422 Knapp St
Brooklyn, NY 11235-1006

Phone

(718) 934-6777

NPI assigned

Oct 30, 2025

Last updated

Oct 30, 2025By the provider in NPPES

Organization subpart

No

Registry information is reported by the provider to CMS and is not verified. About this source

Authorized official

Name

Dr. Mark Filstein, MDNPI 1649396110

Title

Director

Phone

(917) 626-5451

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in NY

Enrollment records 1

Practitioners 2

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles, and the practitioner matching its NPPES authorized official.

• Mark Filstein, MD

  • Specialist
  • Brooklyn, NY
  • NPI 1649396110
  Medicare reassignment Care Compare group NPD Authorized official
• Elina Kaganovsky

  • Internal Medicine Physician
  • Brooklyn, NY
  • NPI 1205867140
  Medicare reassignment Care Compare group

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1761782400000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1761782400000",
    "number": "1679442511",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2422 KNAPP ST",
            "city": "BROOKLYN",
            "state": "NY",
            "postal_code": "112351006",
            "telephone_number": "718-934-6777"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2422 KNAPP ST",
            "city": "BROOKLYN",
            "state": "NY",
            "postal_code": "112351006",
            "telephone_number": "718-934-6777"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "MARK FILSTEIN MD PLLC",
        "organizational_subpart": "NO",
        "enumeration_date": "2025-10-30",
        "last_updated": "2025-10-30",
        "certification_date": "2025-10-30",
        "status": "A",
        "authorized_official_last_name": "FILSTEIN",
        "authorized_official_first_name": "MARK",
        "authorized_official_title_or_position": "DIRECTOR",
        "authorized_official_telephone_number": "917-626-5451",
        "authorized_official_name_prefix": "Dr.",
        "authorized_official_credential": "MD"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "NU",
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Mark Braunstein DO PLLC
• Mark D. Debock DDS
• Mark Daco Family Health NP PLLC
• Mark E. Staton Consulting Inc
• Mark Elliott Hupart Doctor of Podiatric Medicine LLC
• Mark Gventer DPM, PC
• Mark H. Krotowski, M.D.,PC
• Mark Khaimov Family Health NP PC
• Mark Kirschenbaum Medical PC
• Mark Markland NP in Family Health, P.C.

• Internal Medicine Physician in Brooklyn, NY
• Providers in Brooklyn, NY by specialty
• Internal Medicine Physician in New York

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 30, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.