MSK NASSAU
NPI 1053875229
Internal Medicine - Medical Oncology in Uniondale, NY
About Msk Nassau NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MSK NASSAU (NPI 1053875229) is a healthcare organization registered as a medical oncology in Uniondale, New York and active in the NPI registry since January 2019. The organization lists Salvatore Andreozzi, Vp, as its authorized official.
NPPES Registry Identity
Specialties & Licenses 3
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)
Msk Nassau is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
189Medicare enrollment records show 189 clinicians reassign Medicare billing to Msk Nassau, which bills Medicare for the services they deliver. Of these, 3 practice at this address and 19 within 10 miles. Listed here are the 20 practicing nearest to this location.
Clinicians by Medicare Specialty 26
Nearest to this location (20)
See all 189Rockville Centre, NY 11570
Rockville Centre, NY 11570
Rockville Centre, NY 11570
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 Msk Nassau's NPI number?
The NPI number for Msk Nassau is 1053875229. It was assigned to this organization in the NPPES registry on January 22, 2019.
Where is Msk Nassau located?
Msk Nassau is located at 1101 Hempstead Turnpike, Uniondale, NY 11553. The listed phone number is (212) 639-2000.
What is Msk Nassau's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.
Is Msk Nassau enrolled in Medicare?
Yes. Msk Nassau is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Msk Nassau?
According to the CMS Revalidation Reassignment List (October 2026 release), 189 clinicians in 26 Medicare specialties reassign their Medicare billing to Msk Nassau. 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. The largest specialties are Nurse Practitioner (73), Medical Oncology (36) and Hematology/Oncology (12). Of these, 3 practice at this address and 19 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Msk Nassau was last updated on January 22, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 years 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.
# Msk Nassau · NPI 1053875229
Medical Oncology organization in Uniondale, New York. Organization record, active in the CMS NPPES registry since January 22, 2019.
## Identity
- **NPI:** 1053875229 (Entity type: Organization)
- **Enumerated:** January 22, 2019
- **Primary specialty:** Internal Medicine - Medical Oncology · taxonomy 207RX0202X
- **Organization subpart:** No
- **Authorized official:** Salvatore Andreozzi, VP
## Practice location
- **Address:** 1101 HEMPSTEAD TURNPIKE, Uniondale, NY 11553
- **Phone:** (212) 639-2000
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 189 clinicians in 26 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Nurse Practitioner (73), Medical Oncology (36), Hematology/Oncology (12); 3 practice at this address and 19 within 10 miles; [full list](https://npiprofile.com/npi/1053875229/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** January 22, 2019
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Source: [NPI Profile](https://npiprofile.com/npi/1053875229) · Data from the CMS NPPES public registry.