NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gabrielle Elizabeth Mertz, DDS

Dentist in O Fallon, MO · enumerated 2025 · practices at Alex Sharifian DDS Ofallon Modern Dentistry PC.

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

National Provider Identifier

1609765247

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Gabrielle Elizabeth Mertz
Credential DDS
Sex Female
Practice address 3009 Highway K, O Fallon, MO, 63368
Phone (636) 379-7552
Fax (636) 379-7553
Enumeration date Jun 30, 2025
Last updated in NPPES Jun 30, 2025

Taxonomy & licenses

122300000X Dentist Dental Providers · License 2025022931 (MO) Primary
DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential

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 1609765247 active?
Yes, as of the latest NPPES snapshot, NPI 1609765247 is active (record last updated 2025-06-30).
How do I verify Gabrielle Mertz's NPI record?
Cross-check NPI 1609765247 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-06-30.