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

Mrs. Sarah Suzan Lewellin-Cook, RDH

Dental Hygienist in Janesville, WI · enumerated 2009.

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

National Provider Identifier

1336387521

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Registry record

Entity type Individual (Type 1)

Name Mrs. Sarah Suzan Lewellin-Cook

Credential RDH

Sex Female

Practice address Janesville, WI, 53546

Phone (608) 754-0873

Enumeration date Jan 27, 2009

Last updated in NPPES Jan 27, 2009

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

Taxonomy & licenses

124Q00000X Dental Hygienist Dental Providers · License 9815-016 (WI) 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

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 Sarah Lewellin-Cook?

Sarah Lewellin-Cook is registered in NPPES with the primary taxonomy of Dental Hygienist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-01-27.