GNA DIAGNOSTIC
NPI 1689888653
Clinic/Center - Multi-Specialty in Glendale, CA

Q: What is Gna Diagnostic's NPI number?

The NPI number for Gna Diagnostic is 1689888653. It was assigned to this organization in the NPPES registry on May 9, 2007.

Q: What is Gna Diagnostic's specialty?

The primary specialty registered for this NPI is Clinic/Center, specializing in Multi-Specialty, with taxonomy code 261QM1300X.

Q: When was this NPI record last updated?

The NPPES record for Gna Diagnostic was last updated on September 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since May 09, 2007

1386 E GARFIELD AVE, GLENDALE, CA 91205(818) 281-8091 Get Directions Write a Review

NPPES record last updated: September 11, 2025. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Sep 11, 2025, Aug 22, 2020 (2 updates tracked since 2020).

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About Gna Diagnostic NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

GNA DIAGNOSTIC (NPI 1689888653) is a healthcare organization registered as a multi-specialty in Glendale, California and active in the NPI registry since May 2007. The organization lists Grant Kostikian, Owner, as its authorized official.

NPPES Registry Identity

NPI1689888653

Entity TypeOrganization

Primary Taxonomy261QM1300X

Legal Business NameGNA DIAGNOSTIC

Location Address1386 E GARFIELD AVEGlendale, CA 91205-2660

Mailing Address1386 E Garfield AveGlendale, CA 91205-2660 · (818) 281-8091

Phone(818) 281-8091

Organization SubpartNo

Authorized OfficialGrant KostikianOwner · (818) 281-8091

Enumeration DateMay 9, 2007

Last NPPES UpdateSeptember 11, 20252 updates tracked since enumeration

✔ NPI 1689888653 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyClinic/Center · Multi-SpecialtyAmbulatory Health Care Facilities

Taxonomy Code261QM1300X

Also ListedClinic/Center · Sleep Disorder DiagnosticTaxonomy 261QS1200X

Other Providers at the Same Location NPPES 2

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

GRANT DIAGNOSTIC SERVICES,INC

Clinic/Center (Multi-Specialty)

1386 E GARFIELD AVE
GLENDALE, CA 91205

Los Angeles County (818) 956-1581

MR. GRANT KOSTIKIAN

Clinic/Center (Multi-Specialty)

1386 E GARFIELD AVE
GLENDALE, CA 91205

Los Angeles County (818) 281-8091

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Gna Diagnostic's NPI number?

The NPI number for Gna Diagnostic is 1689888653. It was assigned to this organization in the NPPES registry on May 9, 2007.

Where is Gna Diagnostic located?

Gna Diagnostic is located at 1386 E Garfield Ave, Glendale, CA 91205. The listed phone number is (818) 281-8091.

What is Gna Diagnostic's specialty?

The primary specialty registered for this NPI is Clinic/Center, specializing in Multi-Specialty, with taxonomy code 261QM1300X.

When was this NPI record last updated?

The NPPES record for Gna Diagnostic was last updated on September 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.