Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Katherine M Appelhans, RDH

Dental Hygienist in Chicago, IL · enumerated 2009.

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

National Provider Identifier

1225367964

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Registry record

Entity type Individual (Type 1)

Name Katherine M Appelhans

Credential RDH

Sex Female

Practice address 2750 W North Ave, 2nd Floor, Chicago, IL, 60647

Phone (312) 432-4550

Enumeration date Dec 8, 2009

Last updated in NPPES Dec 8, 2009

Taxonomy & licenses

124Q00000X Dental Hygienist Dental Providers · License 020012594 (IL) 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

How do I verify Katherine Appelhans's NPI record?

Cross-check NPI 1225367964 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1225367964 active?

Yes, as of the latest NPPES snapshot, NPI 1225367964 is active (record last updated 2009-12-08).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-12-08.