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

Mrs. Bianca L Larson, RDN

Registered Dietitian in Castle Rock, CO · enumerated 2021.

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

National Provider Identifier

1558936732

Verified

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Registry record

Entity type Individual (Type 1)

Name Mrs. Bianca L Larson

Credential RDN

Sex Female

Practice address Castle Rock, CO, 80104

Phone (937) 510-6659

Enumeration date May 20, 2021

Last updated in NPPES May 20, 2021

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

Taxonomy & licenses

133V00000X Registered Dietitian Dietary & Nutritional Service Providers · License 86146858 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

What is the NPI number for Bianca Larson?

The National Provider Identifier (NPI) for Bianca Larson is 1558936732, a Type 1 (individual) record in the CMS NPPES registry.

Where does Bianca Larson practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-05-20.