Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Thedosios Frantzis

Periodontics in Largo, FL · enumerated 2006.

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

National Provider Identifier

1619038403

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Registry record

Entity type Individual (Type 1)

Name Thedosios Frantzis

Sex Male

Practice address 10500 Ulmerton Rd, Suite 210, Largo, FL, 33771

Phone (727) 581-1900

Enumeration date Dec 13, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

1223P0300X Periodontics Dental Providers · License DN4090 (FL) 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 1619038403 active?

Yes, as of the latest NPPES snapshot, NPI 1619038403 is active (record last updated 2007-07-08).

How do I verify Thedosios Frantzis's NPI record?

Cross-check NPI 1619038403 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 2007-07-08.