Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William Castle, L.D.

Denturist in Eugene, OR · enumerated 2014.

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

National Provider Identifier

1154723831

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Registry record

Entity type Individual (Type 1)

Name William Castle

Credential L.D.

Sex Male

Practice address 2911 W 11th Ave, Suite B., Eugene, OR, 97402

Phone (541) 687-0088

Enumeration date Sep 24, 2014

Last updated in NPPES Sep 24, 2014

Taxonomy & licenses

122400000X Denturist Dental Providers · License DT-DO-10163614 (OR) Primary

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

Where does William Castle practice?

The practice location on file with NPPES is in Eugene, OR. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for William Castle?

The National Provider Identifier (NPI) for William Castle is 1154723831, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-09-24.