Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Nicole J Hartmann, RDH

Dental Hygienist in Chicago, IL · enumerated 2025.

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

National Provider Identifier

1689471203

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Registry record

Entity type Individual (Type 1)

Name Nicole J Hartmann

Credential RDH

Sex Female

Practice address 6428 N California Ave, Chicago, IL, 60645

Phone (847) 804-9429

Enumeration date Mar 1, 2025

Last updated in NPPES Mar 1, 2025

Taxonomy & licenses

124Q00000X Dental Hygienist Dental Providers · License 11129-16 (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.

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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 Nicole Hartmann?

Nicole Hartmann 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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-03-01.