Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Isolyn Rebecca Guy, RDH

Dental Hygienist in Rochester, NY · enumerated 2025.

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

National Provider Identifier

1174336259

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Registry record

Entity type Individual (Type 1)

Name Isolyn Rebecca Guy

Credential RDH

Sex Female

Practice address 480 Genesee St, Rochester, NY, 14611

Phone (585) 436-3040

Enumeration date Jan 31, 2025

Last updated in NPPES Jan 31, 2025

Taxonomy & licenses

124Q00000X Dental Hygienist Dental Providers · License 03291801 (NY) 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

Is NPI 1174336259 active?

Yes, as of the latest NPPES snapshot, NPI 1174336259 is active (record last updated 2025-01-31).

How do I verify Isolyn Guy's NPI record?

Cross-check NPI 1174336259 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-01-31.