Madison Sierra Nieves

Primary specialty

Physician AssistantTaxonomy code 363A00000X

License

034570 Issued in NY

Practice address

38 Plymouth Ave
Buffalo, NY 14201-1722

Phone

(571) 524-0198

NPI assigned

Nov 4, 2024

Sex

Female

Sole proprietor

No

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

Specialties & licenses 3

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: No

Green means eligible to order or refer.

Enrollment records 1

Specialty

Physician Assistant

Education

Other, 2025

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Buffalo Emergency Associates LLPGroup PAC ID 4981502515, 54 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

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.

• Buffalo Emergency Associates LLP

  • Emergency Medicine Physician
  • Williamsville, NY
  • NPI 1508816521
  Medicare reassignment Care Compare group NPD

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

{
    "created_epoch": "1730678400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1764633600000",
    "number": "1467275065",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "38 PLYMOUTH AVE",
            "city": "BUFFALO",
            "state": "NY",
            "postal_code": "142011722",
            "telephone_number": "571-524-0198"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "38 PLYMOUTH AVE",
            "city": "BUFFALO",
            "state": "NY",
            "postal_code": "142011722",
            "telephone_number": "571-524-0198"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "NIEVES",
        "first_name": "MADISON",
        "middle_name": "SIERRA",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2024-11-04",
        "last_updated": "2025-12-02",
        "certification_date": "2025-12-02",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363AS0400X",
            "taxonomy_group": "",
            "desc": "Physician Assistant, Surgical",
            "state": "NY",
            "license": null,
            "primary": false
        },
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "NY",
            "license": "034570",
            "primary": true
        },
        {
            "code": "363AM0700X",
            "taxonomy_group": "",
            "desc": "Physician Assistant, Medical",
            "state": "NY",
            "license": null,
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Sloane Niemet
• Sarah A Nienburg, PA
• Susan Leslie Nierenberg, NP
• Kayla Nieswiadomy, NP
• Ivelis Nieves
• Zulma I. Nieves, CASAC T
• Sanil Balkrishna Nigalye, D.D.S., M.D,
• Mansi Nigam
• Nightingale Primary Care LLC
• Lauren Nigrelli

• Physician Assistant in Buffalo, NY
• Providers in Buffalo, NY by specialty
• Physician Assistant in New York

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Dec 2, 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.