Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

William H Slattery III MD Inc

Q: What is the NPI number for William H Slattery III MD Inc?

The NPI for William H Slattery III MD Inc is 1649716234, a Type 2 (organization) record in the CMS NPPES registry.

Otolaryngology Physician in Honolulu, HI · enumerated 2017 · authorized official William Slattery, Director.

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

National Provider Identifier

1649716234

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Registry record

Entity type Organization (Type 2)

Legal business name William H Slattery III MD Inc

Practice address 1329 Lusitana St Ste 407, Honolulu, HI, 96813

Phone (213) 989-7463

Enumeration date Jan 6, 2017

Last updated in NPPES Jan 6, 2017

Taxonomy & classification

207Y00000X Otolaryngology Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name William Slattery

Title Director

Phone (818) 406-3491

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 is the NPI number for William H Slattery III MD Inc?

The NPI for William H Slattery III MD Inc is 1649716234, a Type 2 (organization) record in the CMS NPPES registry.

Who is the authorized official for William H Slattery III MD Inc?

NPPES lists William Slattery (Director) as the authorized official for this organization.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-01-06.