Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Steven Francis Koos, RDH

Dental Hygienist in Casa Grande, AZ · enumerated 2011.

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

National Provider Identifier

1427354398

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Registry record

Entity type Individual (Type 1)

Name Mr. Steven Francis Koos

Credential RDH

Sex Male

Practice address 865 N Arizola Rd, Casa Grande, AZ, 85122

Phone (520) 836-3446

Fax (520) 836-2305

Enumeration date Feb 9, 2011

Last updated in NPPES Dec 2, 2021

Taxonomy & licenses

124Q00000X Dental Hygienist Dental Providers · License H4840 (AZ) 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

What specialty is Steven Koos?

Steven Koos 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.

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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-12-02.