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

Mrs. Christine Armstrong, RDH

Dental Hygienist in Missoula, MT · enumerated 2014.

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

National Provider Identifier

1376956573

Verified

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Registry record

Entity type Individual (Type 1)

Name Mrs. Christine Armstrong

Credential RDH

Sex Female

Practice address Missoula, MT, 59802

Phone (406) 529-1286

Enumeration date Jun 4, 2014

Last updated in NPPES Nov 9, 2014

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

Taxonomy & licenses

124Q00000X Dental Hygienist Dental Providers · License DEN-RDH-LIC-1337 (MT) 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

Where does Christine Armstrong practice?

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

What is the NPI number for Christine Armstrong?

The National Provider Identifier (NPI) for Christine Armstrong is 1376956573, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-11-09.