Newly Listed Provider — this NPI profile has been added to the NPI registry within the last 30 days.

SOUTH TEXAS DIAGNOSTIC LABORATORIES
NPI 1720909591
Clinical Medical Laboratory in Mcallen, TX

Active since July 24, 2026
4400 PECAN BLVD, MCALLEN, TX 78501(956) 703-9078 Get Directions Write a Review

NPPES record added: July 24, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About South Texas Diagnostic Laboratories NPPES

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

SOUTH TEXAS DIAGNOSTIC LABORATORIES (NPI 1720909591) is a healthcare organization registered as a clinical medical laboratory in Mcallen, Texas and active in the NPI registry since July 2026. The organization lists Luis Aaron Marquez, Managing Partner, as its authorized official.

NPPES Registry Identity

NPI1720909591
Entity TypeOrganization
Primary Taxonomy291U00000X
Legal Business NameSOUTH TEXAS DIAGNOSTIC LABORATORIES
Location Address4400 PECAN BLVDMcallen, TX 78501-3198
Mailing Address5248 N Bryan RdPalmhurst, TX 78573-3934 · (956) 778-2254
Organization SubpartNo
Authorized OfficialLuis Aaron MarquezManaging Partner · (956) 778-2254
Enumeration DateJuly 24, 2026
NPPES CertifiedJuly 24, 2026
NPI 1720909591 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyClinical Medical LaboratoryLaboratories
Taxonomy Code291U00000X
Definition

(1) A clinical laboratory is a facility for the biological, microbiological, serological, chemical, immunohematological, hematological, biophysical, cytological, pathological, or other examination of materials derived from the human body for the purpose of providing information for the diagnosis, prevention, or treatment of any disease or impairment of, human beings. These examinations also include procedures to determine, measure, or otherwise describe the presence or absence of various substances or organisms in the body. Facilities only collecting or preparing specimens (or both) or only serving as a mailing service and not performing testing are not considered clinical laboratories. (2) Any facility that examines materials from the human body for purposes of providing information for the diagnosis, prevention, or treatment of any disease or impairment of, or the assessment of, the health of human beings. Typical divisions of a clinical laboratory include hematology, cytology, bacteriology, histology, biochemistry, medical toxicology, and serology.

4400 PECAN BLVD, Mcallen, TX 78501

Other Names 1

Other NameStdl

Other Providers at the Same Location NPPES

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

Counselor (Professional)
4400 PECAN BLVD, 10
MCALLEN, TX 78501

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 South Texas Diagnostic Laboratories's NPI number?

The NPI number for South Texas Diagnostic Laboratories is 1720909591. It was assigned to this organization in the NPPES registry on July 24, 2026. The provider is also known as Stdl.

Where is South Texas Diagnostic Laboratories located?

South Texas Diagnostic Laboratories is located at 4400 Pecan Blvd, Mcallen, TX 78501. The listed phone number is (956) 703-9078.

What is South Texas Diagnostic Laboratories's specialty?

The primary specialty registered for this NPI is Clinical Medical Laboratory with taxonomy code 291U00000X.

When was this NPI record last updated?

The NPPES record for South Texas Diagnostic Laboratories was last updated on July 24, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.