Nina Ythier, LCSW

Primary specialty

Social WorkerTaxonomy code 104100000X

License

0763831 Issued in NY

Practice address

17 Derby LN
Ossining, NY 10562-2702

Phone

(914) 426-7789

NPI assigned

Mar 24, 2008

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

Other identifiers 1

Medicare fee-for-service enrollment

Enrolled in NY

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: No
• Power mobility devices: No
• Hospice: No

Green means eligible to order or refer.

Enrollment records 1

Specialty

Clinical Social Worker

Education

Other, 2005

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Nina Ythier LCSW PCGroup PAC ID 7517359193, 5 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

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.

• Nina Ythier LCSW PC

  • Social Worker
  • Ossining, NY
  • NPI 1477210284
  Medicare reassignment Care Compare group NPD Authorized official
• Regional Neurological Associates, PC

  • Specialist
  • Bronx, NY
  • NPI 1306800057
  Medicare reassignment NPD

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

{
    "created_epoch": "1206316800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1775606400000",
    "number": "1770755340",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "17 DERBY LN",
            "city": "OSSINING",
            "state": "NY",
            "postal_code": "105622702",
            "telephone_number": "914-426-7789"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "17 DERBY LN",
            "city": "OSSINING",
            "state": "NY",
            "postal_code": "105622702",
            "telephone_number": "914-426-7789"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "YTHIER",
        "first_name": "NINA",
        "credential": "LCSW",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2008-03-24",
        "last_updated": "2026-04-08",
        "certification_date": "2026-04-08",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "104100000X",
            "taxonomy_group": "",
            "desc": "Social Worker",
            "state": "NY",
            "license": "0763831",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "AGENCY NPI",
            "identifier": "1285628552",
            "state": "NY"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Sophia Worth, F.N.P., BC
• Amy Patrice Wylegala, LCSW
• John Xiong
• Alicia Yaurivilca, PTA
• Donna Megan Yellen, LCSW
• Rebecca Marie Yu, LMHC, CASAC-MC, CCTP
• Elizabeth Zalduondo, PNP
• Emilia Zalewska X
• Lorraine Zaranski
• Golsa Zeiarati, PHARMD

• Social Worker in Ossining, NY
• Providers in Ossining, NY by specialty
• Social Worker in New York

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 8, 2026; 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.