Mark Filstein, MD

Primary specialty

SpecialistTaxonomy code 174400000X

License

182093 Issued in NY

Practice address

2422 Knapp St
Brooklyn, NY 11235-1006

Phone

(718) 934-6777

NPI assigned

Mar 22, 2007

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in NY

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Specialty

Internal Medicine

Education

University of California, San Francisco School of Medicine, 1985

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Mark Filstein MD PLLCGroup PAC ID 5799265344, 2 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

• Mark Filstein MD PLLC

  • Internal Medicine Physician
  • Brooklyn, NY
  • NPI 1679442511
  Medicare reassignment Care Compare group NPD Authorized official

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

{
    "created_epoch": "1174521600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1761782400000",
    "number": "1649396110",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "161 MADISON AVE RM 4E",
            "city": "NEW YORK",
            "state": "NY",
            "postal_code": "100165461",
            "telephone_number": "212-481-4041",
            "fax_number": "212-481-4041"
        },
        {
            "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": [
        {
            "address_1": "161 Madison Ave Rm 4E",
            "address_purpose": "LOCATION",
            "city": "New York",
            "state": "NY",
            "postal_code": "100165461",
            "country_code": "US",
            "telephone_number": "212-481-4041",
            "fax_number": "212-481-1008",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "FILSTEIN",
        "first_name": "MARK",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2007-03-22",
        "last_updated": "2025-10-30",
        "certification_date": "2025-10-30",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "174400000X",
            "taxonomy_group": "",
            "desc": "Specialist",
            "state": "NY",
            "license": "182093",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Geralda Fils
• Marjorie Filsaime
• Maya Filshtinskaya, O.D
• Natalia Filshtinskiy
• Charlie Filson-Dineen
• Rachel Danielle Filter, CPNP
• Filton LLC
• Lauren Filus, LMSW
• Sonja Elaine Fimple, RN
• Elayne Fina

• Specialist in Brooklyn, NY
• Providers in Brooklyn, NY by specialty
• Specialist 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; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.