Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Sf Nassau Asc LLC

Q: What type of organization is Sf Nassau Asc LLC?

Sf Nassau Asc LLC is registered in NPPES as a Ambulatory Surgical Clinic/Center (its primary provider taxonomy).

Ambulatory Surgical Clinic/Center in Greenvale, NY · enumerated 2016 · authorized official Alene Stewart, Vp.

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

National Provider Identifier

1760931349

Verified

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Registry record

Entity type Organization (Type 2)

Legal business name Sf Nassau Asc LLC

Practice address 2200 Northern Blvd Ste 100, Greenvale, NY, 11548

Phone (516) 234-8521

Enumeration date Sep 24, 2016

Last updated in NPPES Aug 20, 2025

Taxonomy & classification

261QA1903X Ambulatory Surgical Clinic/Center Ambulatory Health Care Facilities Primary

Authorized official

Name Alene Stewart

Title Vp

Phone (615) 656-0918

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 Sf Nassau Asc LLC?

Sf Nassau Asc LLC is registered in NPPES as a Ambulatory Surgical Clinic/Center (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 2025-08-20.