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Dr. John Madison Clair, DO

Internal Medicine Physician in Williston, ND · enumerated 2007.

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

National Provider Identifier

1427232354

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Registry record

Entity type Individual (Type 1)
Name Dr. John Madison Clair
Credential DO
Sex Male
Practice address 1301 15th Ave W, Williston, ND, 58801
Phone (701) 774-7400
Enumeration date Dec 27, 2007
Last updated in NPPES Jul 21, 2022

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License DO1452 (NV) Secondary
208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License DO1452 (NV) Secondary
208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License 13540 (ND) Secondary
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 13540 (ND) Primary
DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier Type State Issuer
1463371 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 Clair?
The National Provider Identifier (NPI) for John Clair is 1427232354, a Type 1 (individual) record in the CMS NPPES registry.
Where does John Clair practice?
The practice location on file with NPPES is in Williston, ND. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-21.