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South Texas Diagnostic Laboratories

Clinical Medical Laboratory in Mcallen, TX · enumerated 2026 · authorized official Luis Marquez, Managing Partner.

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

National Provider Identifier

1720909591

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Registry record

Entity type Organization (Type 2)
Legal business name South Texas Diagnostic Laboratories
Practice address 4400 Pecan Blvd, Mcallen, TX, 78501
Phone (956) 703-9078
Enumeration date Jul 24, 2026
Last updated in NPPES Jul 24, 2026

Taxonomy & classification

291U00000X Clinical Medical Laboratory Laboratories Primary

Authorized official

Name Luis Marquez
Title Managing Partner
Phone (956) 778-2254

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.

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Frequently asked questions

Who is the authorized official for South Texas Diagnostic Laboratories?
NPPES lists Luis Marquez (Managing Partner) as the authorized official for this organization.
What is the NPI number for South Texas Diagnostic Laboratories?
The NPI for South Texas Diagnostic Laboratories is 1720909591, a Type 2 (organization) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-07-24.