Alexandra A Nmashie-Osei, MD

Primary specialty

Pediatrics PhysicianTaxonomy code 208000000X

License

331130-01 Issued in NY

Practice address

1901 1St Ave
New York, NY 10029-7494

Phone

(212) 423-6262

NPI assigned

May 18, 2021

Sex

Female

Sole proprietor

No

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

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

Pediatric Medicine

Education

Other, 2011

Medicare assignment

May accept Medicare assignment

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Networks

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

Interoperability endpoints

• Direct secure messaging: alexandra.nmashie-osei.1@21260.direct.athenahealth.com

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.

• Westchester Medical Group, P.C.

  • Critical Care Medicine (Internal Medicine) Physician
  • Rye Brook, NY
  • NPI 1881653822

  Pediatrics

  Medicare reassignment NPD
• The Westchester Medical Group PC

  • Durable Medical Equipment & Medical Supplies
  • Greenwich, CT
  • NPI 1790560878
  NPD
• PM Pediatrics of Mamaroneck

  • Urgent Care Clinic/Center
  • Mamaroneck, NY
  • NPI 1073645180
  NPD (past)
• PM Pediatrics PC

  • Urgent Care Clinic/Center
  • Syosset, NY
  • NPI 1730212390

  Pediatrics

  NPD (past)

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

{
    "created_epoch": "1621296000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1747267200000",
    "number": "1093389694",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1901 1ST AVE RM 523",
            "city": "NEW YORK",
            "state": "NY",
            "postal_code": "100297494"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1901 1ST AVE",
            "city": "NEW YORK",
            "state": "NY",
            "postal_code": "100297494",
            "telephone_number": "212-423-6262"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "NMASHIE-OSEI",
        "first_name": "ALEXANDRA",
        "middle_name": "A",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2021-05-18",
        "last_updated": "2025-05-15",
        "certification_date": "2025-05-15",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "208000000X",
            "taxonomy_group": "",
            "desc": "Pediatrics",
            "state": "NY",
            "license": "331130-01",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

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• 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 May 15, 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.