Mary Rachel Westerfield, FNP

Primary specialty

Family Nurse PractitionerTaxonomy code 363LF0000X

License

357408 Issued in NY

Practice address

100 John Roemmelt Dr Ste 302
Horseheads, NY 14845-8304

Phone

(607) 873-1810

Fax

(607) 562-3157

NPI assigned

Jul 30, 2025

Sex

Female

Sole proprietor

No

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: No

Green means eligible to order or refer.

Enrollment records 1

Specialty

Nurse Practitioner

Education

Other, 2025

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Arnot Ogden Medical CenterGroup PAC ID 5395798417, 219 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Arnot Ogden Medical Center Hospital, Elmira, NY, CCN 330090

Medicare enrollment (NPD)

Enrolled

Credentials

Nurse Practitioner

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.

• Arnot Ogden Medical Center

  • General Acute Care Hospital
  • Elmira, NY
  • NPI 1083605661
  Medicare reassignment Care Compare group NPD
• Arnot Ogden Medical Center

  • Community/Retail Pharmacy
  • Elmira, NY
  • NPI 1831875004
  NPD
• Arnot Medical Services PLLC

  • Internal Medicine Physician
  • Elmira, NY
  • NPI 1427326768
  NPD (past)

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• Arnot Ogden Medical Center

  • General Acute Care Hospital
  • Elmira, NY
  • NPI 1083605661
  Care Compare affiliation

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

{
    "created_epoch": "1753833600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1753833600000",
    "number": "1063395622",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "600 IVY ST STE 206",
            "city": "ELMIRA",
            "state": "NY",
            "postal_code": "149051627",
            "telephone_number": "607-271-2050",
            "fax_number": "607-271-2071"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "100 JOHN ROEMMELT DR STE 302",
            "city": "HORSEHEADS",
            "state": "NY",
            "postal_code": "148458304",
            "telephone_number": "607-873-1810",
            "fax_number": "607-562-3157"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WESTERFIELD",
        "first_name": "MARY",
        "middle_name": "RACHEL",
        "credential": "FNP",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2025-07-30",
        "last_updated": "2025-07-30",
        "certification_date": "2025-06-30",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": "NY",
            "license": "357408",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Todd Wang, D.O.
• Joyce E Wasserman, P.T.
• Christopher C Wawrzusin, NP
• Tianna Renea Wawrzusin, FNP-C
• Maria Scorzelli Webb, FNP-C
• Eileen F Wheelock, RPH
• Amy L White, M.D.
• Morgan White, LMSW
• Vickie Lynn White
• Victoria Whitford

• Family Nurse Practitioner in Horseheads, NY
• Providers in Horseheads, NY by specialty
• Family Nurse Practitioner in New York

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