Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Northern Westchester Hospital Assoc

Neonatal-Perinatal Medicine Physician in Mount Kisco, NY · enumerated 2008 · authorized official John Partenza, Cfo.

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

National Provider Identifier

1144488271

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Registry record

Entity type Organization (Type 2)

Legal business name Northern Westchester Hospital Assoc

Practice address 400 E Main St, Northern Westchester Hospital, Neonatology, Mount Kisco, NY, 10549

Phone (914) 666-1200

Fax (914) 666-1965

Enumeration date May 27, 2008

Last updated in NPPES May 27, 2008

Taxonomy & classification

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians Secondary

2080N0001X Neonatal-Perinatal Medicine Physician Allopathic & Osteopathic Physicians Primary

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians Secondary

Authorized official

Name John Partenza

Title Cfo

Phone (914) 666-1310

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 Northern Westchester Hospital Assoc?

Northern Westchester Hospital Assoc is registered in NPPES as a Neonatal-Perinatal Medicine 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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-05-27.