DNA Testing in Texas
TestMark DNA operates 162 certified DNA testing collection sites across 83 cities in Texas, including 18 sites in Houston, 12 in San Antonio, 10 in Austin, 8 in El Paso, and 7 in Dallas.
Texas is the second-largest U.S. state by both area and population, anchored by Houston, San Antonio, Dallas, and Austin, with roughly 30 million residents across 254 counties. TestMark DNA operates 162 certified collection sites across 83 Texas cities, from the Gulf Coast through the Hill Country to the Panhandle and the Rio Grande Valley. Every Texas collection site is CLIA-certified to the federal standard used by hospital and physician laboratories, and walk-ins are welcome at most locations.
Sources: The Science of Paternity Testing (University of Minnesota Open Textbook), UT Southwestern Medical Center (Dallas), Texas Attorney General: Court-Ordered Paternity, Texas (Wikipedia)
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DNA Testing Across Texas
DNA testing across Texas falls into two broad categories. Legal tests, which require chain-of-custody documentation collected at one of our certified sites with government-issued ID, are accepted by Texas family courts in paternity, custody, and child-support proceedings under the Texas Family Code. Personal (peace-of-mind) tests follow the same scientific standards but skip the chain-of-custody paperwork and are not admissible in court. Both options use a painless cheek swab, both use accredited laboratories, and both return results in 3 to 5 business days once the lab receives all samples. Texas residents do not need a physician referral or prescription to begin testing through TestMark DNA.
The end-to-end process is straightforward. You call our team for a free consultation to confirm which test fits your situation, then visit any of our 162 Texas collection sites for the cheek-swab sample collection. Visits typically take under 30 minutes, including the chain-of-custody paperwork for legal tests. Once the accredited laboratory receives all samples from every tested party, standard turnaround is 3 to 5 business days. Results are delivered confidentially by encrypted email or secure portal and are never released over the phone. For court-admissible legal tests, original signed paperwork accompanies the result, ready for submission to Texas family courts.
83 Cities with DNA Testing in Texas
Our largest Texas collection footprint is in Houston with 18 sites, followed by San Antonio (12), Austin (10), El Paso (8), Dallas (7), Fort Worth (5), and Arlington (4). Smaller markets across Texas, including Victoria, Lufkin, McAllen, Corpus Christi, and Tyler, each have at least one TestMark DNA collection site so that residents in mid-sized and rural Texas communities do not need to drive to a major metro for DNA testing. Walk-ins are welcome at every location during published business hours.