Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Cheryl Rae Larson, RPH

Pharmacist in Mason City, IA · enumerated 2007.

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

National Provider Identifier

1720267479

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Registry record

Entity type Individual (Type 1)

Name Cheryl Rae Larson

Credential RPH

Sex Female

Practice address 1000 4th St Sw, Mason City, IA, 50401

Phone (641) 422-7606

Enumeration date Oct 30, 2007

Last updated in NPPES Dec 23, 2021

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License 18257 (IA) Primary

RPH · Registered Pharmacist: A licensed pharmacist registered with a state board of pharmacy. About the RPH 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.

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Frequently asked questions

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Cheryl Larson?

Cheryl Larson is registered in NPPES with the primary taxonomy of Pharmacist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-12-23.