Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Isabelle Koumbairia, DH

Dental Hygienist in Washington, DC · enumerated 2016.

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

National Provider Identifier

1427500289

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Registry record

Entity type Individual (Type 1)

Name Isabelle Koumbairia

Credential DH

Sex Female

Practice address 1525 14th St Nw, Washington, DC, 20005

Phone (202) 745-7000

Enumeration date Oct 27, 2016

Last updated in NPPES Oct 27, 2016

Taxonomy & licenses

124Q00000X Dental Hygienist Dental Providers · License HYG1000916 (DC) 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 1427500289 active?

Yes, as of the latest NPPES snapshot, NPI 1427500289 is active (record last updated 2016-10-27).

How do I verify Isabelle Koumbairia's NPI record?

Cross-check NPI 1427500289 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 2016-10-27.