Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Antonia Knudsen, RD

Registered Dietitian in Fresno, CA · enumerated 2006.

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

National Provider Identifier

1679658892

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Registry record

Entity type Individual (Type 1)

Name Ms. Antonia Knudsen

Credential RD

Sex Female

Practice address 1925 E Dakota Ave, Fresno, CA, 93726

Phone (559) 459-1672

Fax (559) 459-1058

Enumeration date Oct 26, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

133V00000X Registered Dietitian Dietary & Nutritional Service Providers · License 634558 (CA) Primary

RD · Registered Dietitian: A nutrition professional credentialed by the Commission on Dietetic Registration. About the RD credential

Other identifiers

Identifier	Type	State	Issuer
ZZZ26959Z	Other	-	PPIN

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

How do I verify Antonia Knudsen's NPI record?

Cross-check NPI 1679658892 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1679658892 active?

Yes, as of the latest NPPES snapshot, NPI 1679658892 is active (record last updated 2007-07-08).

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