Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William Edward Thomas, O.D.

Optometrist in Box Elder, MT · enumerated 2006 · practices at Rocky Boy Health Clinic.

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

National Provider Identifier

1275543225

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Registry record

Entity type Individual (Type 1)

Name William Edward Thomas

Credential O.D.

Sex Male

Practice address Rr 1 Box 664, Box Elder, MT, 59521

Phone (406) 395-4486

Fax (406) 395-5374

Enumeration date Aug 9, 2006

Last updated in NPPES Jul 30, 2019

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 773 (MT) Primary

OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does William Thomas practice?

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

What is the NPI number for William Thomas?

The National Provider Identifier (NPI) for William Thomas is 1275543225, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-07-30.