Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Msk Nassau

Q: What type of organization is Msk Nassau?

Msk Nassau is registered in NPPES as a Medical Oncology Physician (its primary provider taxonomy).

Medical Oncology Physician in Uniondale, NY · enumerated 2019 · authorized official Salvatore Andreozzi, Vp.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1053875229

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Registry record

Entity type Organization (Type 2)

Legal business name Msk Nassau

Practice address 1101 Hempstead Turnpike, Uniondale, NY, 11553

Phone (212) 639-2000

Enumeration date Jan 22, 2019

Last updated in NPPES Jan 22, 2019

Taxonomy & classification

207RX0202X Medical Oncology Physician Allopathic & Osteopathic Physicians Primary

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians Secondary

2086X0206X Surgical Oncology Physician Allopathic & Osteopathic Physicians Secondary

Authorized official

Name Salvatore Andreozzi

Title Vp

Phone (646) 227-3751

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What type of organization is Msk Nassau?

Msk Nassau is registered in NPPES as a Medical Oncology Physician (its primary provider taxonomy).

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-01-22.