Blair Seidler Hammond, M.D.

Primary specialty

Pediatrics PhysicianTaxonomy code 208000000X

License

234035 Issued in NY

Practice address

5 E 98TH St FL 10
New York, NY 10029-6501

Phone

(212) 241-4242

NPI assigned

Oct 12, 2006

Sex

Female

Sole proprietor

Yes

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

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Networks

• Healthfirst Medicare Network H3359
• Healthfirst Medicare Network H1722
• Healthfirst Medicare Network H9678
• Healthfirst Medicare Network H5989

Interoperability endpoints

• FHIR API: https://api.platform.athenahealth.com/12623/brand/1/csg/1/fhir/r4

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.

• Icahn School of Medicine at Mount Sinai

  • Obstetrics & Gynecology Physician
  • New York, NY
  • NPI 1124392212

  Single Specialty

  NPD (past)
• Mount Sinai Diagnostic and Treatment Center

  • Clinic/Center
  • New York, NY
  • NPI 1669476156

  Single Specialty

  NPD (past)
• Mount Sinai Hospital

  • General Acute Care Hospital
  • Long Island City, NY
  • NPI 1245248939
  NPD (past)
• Mount Sinai Hospital

  • General Acute Care Hospital
  • New York, NY
  • NPI 1932103413
  NPD (past)
• Sound Beach Pediatrics, LLC

  • Pediatrics Physician
  • Stamford, CT
  • NPI 1548625569

  Single Specialty

  NPD (past)

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

{
    "created_epoch": "1160611200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1769990400000",
    "number": "1952490740",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "306 E 96TH ST",
            "address_2": "APT. 17A",
            "city": "NEW YORK",
            "state": "NY",
            "postal_code": "101283839",
            "telephone_number": "212-744-3944"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "5 E 98TH ST FL 10",
            "city": "NEW YORK",
            "state": "NY",
            "postal_code": "100296501",
            "telephone_number": "212-241-4242"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "2001 W Main St Ste 132",
            "address_purpose": "LOCATION",
            "city": "Stamford",
            "state": "CT",
            "postal_code": "069024544",
            "country_code": "US",
            "telephone_number": "203-363-0123",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "HAMMOND",
        "first_name": "BLAIR",
        "middle_name": "SEIDLER",
        "credential": "M.D.",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2006-10-12",
        "last_updated": "2026-02-02",
        "certification_date": "2026-02-02",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208000000X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Pediatrics",
            "state": "CT",
            "license": "66999",
            "primary": false
        },
        {
            "code": "208000000X",
            "taxonomy_group": "",
            "desc": "Pediatrics",
            "state": "NY",
            "license": "234035",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Jane Hammerslough, M.S., L.M.F.T.
• Hammertoe Group of Nyc
• Laurette Hammill
• Patrick James Hammill, M.D.
• Tiana Hammond-Copeland
• Brigitte M Hammond, LCAT
• Brittiany Hammond
• Christy Ann Samira Hammond, DPT
• Gillian Hammond, LMHC
• Harris Hammond, MD

• Pediatrics Physician in New York, NY
• Providers in New York, NY by specialty
• Pediatrics Physician in New York

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 2, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.