Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Jan Williamson, RD,LD

Registered Dietitian in Blackfoot, ID · enumerated 2010.

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

National Provider Identifier

1346552486

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Registry record

Entity type Individual (Type 1)

Name Jan Williamson

Credential RD,LD

Sex Female

Practice address 98 Poplar St, Blackfoot, ID, 83221

Phone (208) 785-4100

Enumeration date Jul 6, 2010

Last updated in NPPES Jul 6, 2010

Taxonomy & licenses

133V00000X Registered Dietitian Dietary & Nutritional Service Providers · License D-041 (ID) Primary

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

What is the NPI number for Jan Williamson?

The National Provider Identifier (NPI) for Jan Williamson is 1346552486, a Type 1 (individual) record in the CMS NPPES registry.

Where does Jan Williamson practice?

The practice location on file with NPPES is in Blackfoot, ID. 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 2010-07-06.