Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Glenna S Thompson, RDH

Dental Hygienist in Poplar, MT · enumerated 2018 · practices at Us Health Dept of Health & Human Services.

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

National Provider Identifier

1821570599

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Registry record

Entity type Individual (Type 1)

Name Glenna S Thompson

Credential RDH

Sex Female

Practice address 107 H Street East, Poplar, MT, 59255

Phone (406) 768-2179

Enumeration date Aug 30, 2018

Last updated in NPPES Aug 30, 2018

Taxonomy & licenses

124Q00000X Dental Hygienist Dental Providers · License H006938 (AZ) Primary

Other identifiers

Identifier	Type	State	Issuer
H006938	Other	AZ	LICENSE
000009301	Other	MT	BC/BS OF MONTANA
2210068	Medicaid	MT	-

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 Glenna Thompson?

Glenna Thompson 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 2018-08-30.