NINA YTHIER LCSW PC
NPI 1477210284
Social Worker in Ossining, NY
About Nina Ythier Lcsw Pc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
NINA YTHIER LCSW PC (NPI 1477210284) is a healthcare organization registered as a social worker in Ossining, New York and active in the NPI registry since November 2021. The organization lists Nina Ythier, Owner, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Nina Ythier Lcsw Pc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
4Medicare enrollment records show 4 clinicians reassign Medicare billing to Nina Ythier Lcsw PC, which bills Medicare for the services they deliver. Of these, 1 practice at this address. They are listed nearest first.
Clinicians, nearest first (4)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Nina Ythier Lcsw PC's NPI number?
The NPI number for Nina Ythier Lcsw PC is 1477210284. It was assigned to this organization in the NPPES registry on November 29, 2021.
Where is Nina Ythier Lcsw PC located?
Nina Ythier Lcsw PC is located at 17 Derby Ln, Ossining, NY 10562. The listed phone number is (914) 297-9998.
What is Nina Ythier Lcsw PC's specialty?
The primary specialty registered for this NPI is Social Worker with taxonomy code 104100000X.
Is Nina Ythier Lcsw PC enrolled in Medicare?
Yes. Nina Ythier Lcsw PC is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Nina Ythier Lcsw PC?
According to the CMS Revalidation Reassignment List (October 2026 release), 4 clinicians, all in Clinical Social Worker, reassign their Medicare billing to Nina Ythier Lcsw PC. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Of these, 1 practice at this address. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Nina Ythier Lcsw PC was last updated on April 8, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Nina Ythier Lcsw Pc · NPI 1477210284
Social Worker organization in Ossining, New York. Organization record, active in the CMS NPPES registry since November 29, 2021.
## Identity
- **NPI:** 1477210284 (Entity type: Organization)
- **Enumerated:** November 29, 2021
- **Primary specialty:** Social Worker · taxonomy 104100000X
- **Organization subpart:** No
- **Authorized official:** Nina Ythier, OWNER
## Practice location
- **Address:** 17 DERBY LN, Ossining, NY 10562-2702
- **Phone:** (914) 297-9998
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 4 clinicians (Clinical Social Worker) reassign Medicare billing to this organization (form CMS-855R); 1 practice at this address · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** April 8, 2026
---
Source: [NPI Profile](https://npiprofile.com/npi/1477210284) · Data from the CMS NPPES public registry.