#1Texas Digestive Specialists
Based in Harlingen, TX
Clinical & Reference Laboratories in Harlingen, TX
The top-ranked clinical laboratories serving Harlingen, TX are Texas Digestive Specialists, Laboratory Corporation Of America - Weslaco Texas and South Texas Clinical Laboratory. We list 12 clinical laboratories serving Harlingen, TX. 12 of the providers shown match an active record from Centers for Medicare & Medicaid Services, checked on the date shown. Rankings follow our published methodology; sponsored placements never change rank.
Clinical & Reference Laboratories serving Harlingen, TX (Cameron County). 12 providers, 10 of the top 10 verified against federal or state records. Registry records checked on 2026-11-04.
Top 10 ranked clinical laboratories for Harlingen
#2Laboratory Corporation Of America - Weslaco Texas
Serves this area from Weslaco, TX (18 mi)#3South Texas Clinical Laboratory
Serves this area from Alamo, TX (26 mi)#4Labquest, LLC Rio Grande Valley Labs
Serves this area from Alamo, TX (26 mi)#5Guillen, Tiu & Associates Md PA
Serves this area from Edinburg, TX (29 mi)#6Maria Guajardo Md PA
Serves this area from Edinburg, TX (32 mi)#7Per Lab LLC
Serves this area from McAllen, TX (32 mi)#8All Children's Pediatric Clinic P A
Serves this area from McAllen, TX (33 mi)#9Regional Medical Laboratory North
Serves this area from McAllen, TX (33 mi)#10Alton Family Clinic
Serves this area from Alton, TX (37 mi)
2 more providers serving this area
- Advance Medical Lab, Mission, TX (37 mi)
- Mission Pediatric Center, Mission, TX (38 mi)
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Frequently asked questions
How many clinical laboratories serve Harlingen?
We list 12 clinical laboratories serving Harlingen, TX: 1 based there and 11 serving it from nearby. 10 of the top 10 match an active federal or state record, checked on 2026-11-04.
Which clinical laboratories serve Harlingen?
The top-ranked clinical laboratories serving Harlingen, TX are Texas Digestive Specialists, Laboratory Corporation Of America - Weslaco Texas, South Texas Clinical Laboratory, Labquest, LLC Rio Grande Valley Labs and Guillen, Tiu & Associates Md PA. The full ranked list, with the official records each provider matched, is on this page.
Which clinical laboratories serving Harlingen are verified against official records?
10 of the top 10 match an active official record: Texas Digestive Specialists (Centers for Medicare & Medicaid Services), Laboratory Corporation Of America - Weslaco Texas (Centers for Medicare & Medicaid Services), South Texas Clinical Laboratory (Centers for Medicare & Medicaid Services), Labquest, LLC Rio Grande Valley Labs (Centers for Medicare & Medicaid Services) and Guillen, Tiu & Associates Md PA (Centers for Medicare & Medicaid Services), and 5 more on this page. Each badge links to the official record it matched.
How are these companies ranked?
By our published methodology: verified registrations, documented capabilities, years registered and responsiveness. Sponsored placements are shown separately and never affect rank.
What does "Verified" mean on this page?
"Verified" means we matched the provider to an active official record on the date shown; each badge links to that record. The absence of a badge only means we have not verified that item.
What does CLIA certification mean?
CLIA certificates are issued under federal law for laboratories testing human specimens. A certificate of compliance or accreditation covers moderate and high complexity testing; a certificate of waiver covers only simple waived tests.
"Verified" means we matched the provider to an active official record on the date shown. The absence of a badge only means we have not verified that item. How we rank and verify. Page updated .