Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Nancy Lee Olson, MS RD LN

Q: What is the NPI number for Nancy Olson?

The National Provider Identifier (NPI) for Nancy Olson is 1952590291, a Type 1 (individual) record in the CMS NPPES registry.

Registered Dietitian in Watertown, SD · enumerated 2007.

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

National Provider Identifier

1952590291

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Registry record

Entity type Individual (Type 1)

Name Mrs. Nancy Lee Olson

Credential MS RD LN

Sex Female

Practice address 401 9th Ave Nw, Watertown, SD, 57701

Phone (605) 882-7874

Fax (605) 882-7720

Enumeration date Oct 23, 2007

Last updated in NPPES Oct 23, 2007

Taxonomy & licenses

133V00000X Registered Dietitian Dietary & Nutritional Service Providers · License 0158 (SD) 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 Nancy Olson practice?

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

What is the NPI number for Nancy Olson?

The National Provider Identifier (NPI) for Nancy Olson is 1952590291, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-10-23.