Seth Greenblatt LLC

Primary specialty

Clinical Social WorkerTaxonomy code 1041C0700X

Legal business name

SETH GREENBLATT LLC

Practice address

1615 L St NW Ste 340
Washington, DC 20036-5617

Phone

(703) 963-2019

NPI assigned

Mar 3, 2025

Organization subpart

No

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

Authorized official

Name

Seth Greenblatt, LSWNPI 1386167351

Title

Owner

Phone

(703) 963-2019

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in DC

Enrollment records 1

Locations

Practitioners 1

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles.

• Seth A. Greenblatt, LCSW-C

  • Clinical Social Worker
  • Washington, DC
  • NPI 1386167351
  Medicare reassignment NPD Authorized official

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

{
    "created_epoch": "1740960000000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1770163200000",
    "number": "1407653926",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4689 HAZLETON LN",
            "city": "LAKE WORTH",
            "state": "FL",
            "postal_code": "334498635"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1615 L ST NW STE 340",
            "city": "WASHINGTON",
            "state": "DC",
            "postal_code": "200365617",
            "telephone_number": "703-963-2019"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "SETH GREENBLATT LLC",
        "organizational_subpart": "NO",
        "enumeration_date": "2025-03-03",
        "last_updated": "2026-02-04",
        "certification_date": "2026-02-04",
        "status": "A",
        "authorized_official_last_name": "GREENBLATT",
        "authorized_official_first_name": "SETH",
        "authorized_official_title_or_position": "OWNER",
        "authorized_official_telephone_number": "703-963-2019",
        "authorized_official_credential": "LSW"
    },
    "taxonomies": [
        {
            "code": "1041C0700X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Social Worker, Clinical",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Michael Sessum
• Isabell Am Sesterhenn, M.D.
• Kayla Sesto, PA
• Set Sports Physical Therapy PLLC
• Tigist Berihun Setegne
• Moniesha Seth
• Neeta Sethi, MD
• Karishma Setia
• Natalie Venters Setliff, M.S., LMFT
• Jiffy Seto, MD

• Clinical Social Worker in Washington, DC
• Providers in Washington, DC by specialty
• Clinical Social Worker in District of Columbia

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 4, 2026; 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.