Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Pulmonary & Sleep Specialists of Southern Westchester LLC

Specialist in Larchmont, NY · enumerated 2006 · authorized official Maggie Irizarry, Billing Director.

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

National Provider Identifier

1669535241

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Registry record

Entity type Organization (Type 2)

Legal business name Pulmonary & Sleep Specialists of Southern Westchester LLC

Practice address 2365 Boston Post Rd, Larchmont, NY, 10538

Phone (914) 740-3602

Fax (914) 654-4971

Enumeration date Dec 18, 2006

Last updated in NPPES Jan 18, 2013

Taxonomy & classification

174400000X Specialist Other Service Providers Primary

Authorized official

Name Maggie Irizarry

Title Billing Director

Phone (914) 740-3602

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 Pulmonary & Sleep Specialists of Southern Westchester LLC?

Pulmonary & Sleep Specialists of Southern Westchester LLC is registered in NPPES as a Specialist (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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-01-18.