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

Mr. Clarence Hugh Jonson, N.D.

Specialist in Anacortes, WA · enumerated 2014.

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

National Provider Identifier

1972903615

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Registry record

Entity type Individual (Type 1)

Name Mr. Clarence Hugh Jonson

Credential N.D.

Sex Male

Practice address Anacortes, WA, 98221

Phone (360) 615-4722

Fax (360) 588-6081

Enumeration date Aug 29, 2014

Last updated in NPPES Sep 17, 2014

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

Taxonomy & licenses

174400000X Specialist Other Service Providers · License ND100202 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 Clarence Jonson practice?

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

What is the NPI number for Clarence Jonson?

The National Provider Identifier (NPI) for Clarence Jonson is 1972903615, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-09-17.