Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William H Irish-O'Brien, RN

Registered Nurse in Bronx, NY · enumerated 2021.

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

National Provider Identifier

1114509197

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Registry record

Entity type Individual (Type 1)

Name William H Irish-O'Brien

Credential RN

Sex Male

Practice address 1070 Havemeyer Ave, Bronx, NY, 10462

Phone (718) 863-6200

Enumeration date Apr 28, 2021

Last updated in NPPES Apr 28, 2021

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 408720-1 (NY) Primary

RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam. About the RN credential

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.

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Frequently asked questions

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is William Irish-O'Brien?

William Irish-O'Brien is registered in NPPES with the primary taxonomy of Registered Nurse. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-04-28.