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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

John Williams, OD

Optometrist in Williston, ND · enumerated 2006.

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

National Provider Identifier

1851465108

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Registry record

Entity type Individual (Type 1)
Name John Williams
Credential OD
Sex Male
Practice address Williston, ND, 58801
Phone (701) 572-7641
Fax (701) 572-7710
Enumeration date Nov 20, 2006
Last updated in NPPES Jul 8, 2007

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 373 (ND) Primary
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD credential

Other identifiers

Identifier Type State Issuer
60619 Medicaid ND -

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

What is the NPI number for John Williams?
The National Provider Identifier (NPI) for John Williams is 1851465108, a Type 1 (individual) record in the CMS NPPES registry.
Where does John Williams practice?
The practice location on file with NPPES is in Williston, ND. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.