Nina Ythier, LCSW
Social Worker · Ossining, NY
Nina Ythier, LCSW is a social worker with a practice address in Ossining, New York, and NPI 1770755340, issued on Mar 24, 2008. Check the license (New York 0763831, as entered in NPPES) with the New York board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Nina Ythier
- Credential
- LCSW
- Primary taxonomy
- Social Worker 104100000X
- License number
- 0763831 NY
Self-reported in NPPES; status is on the state search - Practice location
- 17 Derby LN, Ossining, NY 10562
- Phone
- (914) 426-7789
- Enumerated
- Mar 24, 2008
- Record last updated
- Apr 8, 2026
- Medicare enrollment
- Enrolled (PECOS I20210325001220); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest social worker records → All 23,561 in New York → Look up another NPI →
Verify Nina Ythier in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich New York board licenses this profession
Search for license 0763831Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Nina Ythier Lcsw PCMount Vernon, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nina Ythier among 23,561 social worker records in New York
Nina Ythier, LCSW is one of 23,561 social worker records with a practice address in New York. 3% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 8% of them.
- NPI issued2008 · 8% of these records are older, 89% newer
- In a Medicare fileYes · 3% of these records are
- In the CMS Doctors and Clinicians fileYes · 5% of these records are
- Graduated2005 · median 2013 among the 1,177 with a school on file
- Record last updated2026 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 104100000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
11 social worker records list a practice address in Ossining
They are 11 of the 403 NPPES records with a practice address in Ossining, and 23,561 social worker records in New York.
All 23,561 in New York → Every provider in Ossining → Social Worker nationwide →
The 8 social worker records with the nearest ZIP codes
- Lisa Dellacorte, LMSWOssining, NY 105621881831097
- Elisha Fernandes, LCSWOssining, NY 105621124622501
- Adele Fishman, LCSW-ROssining, NY 105621578628046
- Joanna Hartshorne, LMSWOssining, NY 105621659043560
- Nancy Horbatuk, LICENSED MSWOssining, NY 105621831942283
- Phyllis MarshallOssining, NY 105621669005005
- Karen Valdez, LCSWOssining, NY 105621396171112
- Christina Wilk, LMSWOssining, NY 105621164014320
Common questions
What is Nina Ythier, LCSW's NPI number?
Nina Ythier, LCSW's National Provider Identifier (NPI) is 1770755340, issued on Mar 24, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Nina Ythier, LCSW located?
The NPPES record lists a practice address at 17 Derby LN, Ossining, NY, 10562. Phone: (914) 426-7789. Providers update this record themselves, so call before visiting.
How can I verify Nina Ythier, LCSW's license?
NPPES lists New York license number 0763831, as entered by the provider. Search the New York board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.