MAIN STOP TESTING SVCS
NPI 1629920962
Clinical Medical Laboratory in Pearland, TX

Active since February 10, 2026CLIA 45D2330202 · Waiver
2743 SMITH RANCH RD STE 1904, PEARLAND, TX 77584(713) 551-8743 Get Directions Write a Review

NPPES record last updated: March 31, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Mar 31, 2026, Mar 21, 2026 (2 updates tracked since 2026).

About Main Stop Testing Svcs NPPES

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

MAIN STOP TESTING SVCS (NPI 1629920962) is a healthcare organization registered as a clinical medical laboratory in Pearland, Texas and active in the NPI registry since February 2026. The organization holds a CLIA Waiver certificate valid through September 10, 2027 and lists Rj Williams, Director, as its authorized official.

NPPES Registry Identity

NPI1629920962
Entity TypeOrganization
Primary Taxonomy291U00000X
Legal Business NameMAIN STOP TESTING SVCS
Location Address2743 SMITH RANCH RD STE 1904Pearland, TX 77584-0188
Mailing Address2743 Smith Ranch Rd Ste 1904Pearland, TX 77584-0188 · (713) 551-8743
Organization SubpartNo
Authorized OfficialRj WilliamsDirector · (713) 551-8743
Enumeration DateFebruary 10, 2026
Last NPPES UpdateMarch 31, 20262 updates tracked since enumeration
NPPES CertifiedMarch 31, 2026
NPI 1629920962 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.
2743 SMITH RANCH RD STE 1904, Pearland, TX 77584

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 45D2330202

Main Stop Testing Svcs LLC · Pearland, TX
Active · expires Sep 10, 2027
CLIA Number45D2330202
Laboratory TypeHome Health Agency
Certificate Effective DateSeptember 11, 2025
Certificate Expiration DateSeptember 10, 2027
Laboratory DirectorDr. Sydnie Williams
Laboratory Phone(713) 551-8743
Laboratory LocationMain Stop Testing Svcs LLC2743 Smith Ranch Rd Unit 1904, Pearland, TX 77584
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory to perform only waived tests.

Other Providers at the Same Location NPPES

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

Internal Medicine (Clinical & Laboratory Immunology)
2743 SMITH RANCH RD STE 1904
PEARLAND, TX 77584

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 Main Stop Testing Svcs's NPI number?

The NPI number for Main Stop Testing Svcs is 1629920962. It was assigned to this organization in the NPPES registry on February 10, 2026.

Where is Main Stop Testing Svcs located?

Main Stop Testing Svcs is located at 2743 Smith Ranch Rd Ste 1904, Pearland, TX 77584. The listed phone number is (713) 551-8743.

What is Main Stop Testing Svcs's specialty?

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

Does Main Stop Testing Svcs hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 45D2330202) is associated with this NPI, valid through September 10, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Main Stop Testing Svcs was last updated on March 31, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.