DNA Testing Locations - Castroville, TX

Paternity, Child Custody, Court

With 31 testing centers in the Castroville area, we offer drug and alcohol testing for employment, probation and DOT requirements. Additional services include DOT consortium enrollment, DNA Testing and background checks. Order your tests and services online or call (800) 221-4291.

31 DNA-Testing Centers in Castroville

Minutes Away, Test Today

1501 Houston St

0.64 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
1501 Houston St
Castroville, TX 78009

3903 Wiseman Blvd Suite 219

13.89 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
3903 Wiseman Blvd Suite 219
San Antonio, TX 78251

3100 Avenue E

15.42 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
3100 Avenue E
Hondo, TX 78861

4436 Culebra Rd Ste 3

18.31 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
4436 Culebra Rd Ste 3
San Antonio, TX 78228

6430 Bandera Rd Ste 98

18.57 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
6430 Bandera Rd Ste 98
San Antonio, TX 78238

6100 Bandera Road, Suite 400

18.66 mi
🕑 Testing Hours: Mon–Fri: 8:30 AM-4:00 PM✓ Walk-in with Electronic Donor Pass
6100 Bandera Road, Suite 400
San Antonio, TX 78238

9234 N Loop 1604 W Ste 110

18.71 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
9234 N Loop 1604 W Ste 110
San Antonio, TX 78249

5720 Bandera Rd Ste 14

18.98 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
5720 Bandera Rd Ste 14
San Antonio, TX 78238

115 Duncan Dr

19.30 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
115 Duncan Dr
San Antonio, TX 78226

3015 General Hudnell Dr

19.45 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
3015 General Hudnell Dr
San Antonio, TX 78226

9727 Poteet Jourdanton Fwy Ste 101

19.81 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
9727 Poteet Jourdanton Fwy Ste 101
San Antonio, TX 78211

9727 Poteet Jourdanton Fwy Ste 105

19.81 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
9727 Poteet Jourdanton Fwy Ste 105
San Antonio, TX 78211

7400 Barlite Blvd

20.01 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
7400 Barlite Blvd
San Antonio, TX 78224

7390 Barlite Blvd Ste 135

20.03 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
7390 Barlite Blvd Ste 135
San Antonio, TX 78224

5282 Medical Dr Ste 190

20.44 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
5282 Medical Dr Ste 190
San Antonio, TX 78229

2040 Babcock Rd Ste 101

20.60 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
2040 Babcock Rd Ste 101
San Antonio, TX 78229

2040 Babcock Rd Ste 303

20.60 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
2040 Babcock Rd Ste 303
San Antonio, TX 78229

4241 Woodcock Dr Ste A125

20.72 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
4241 Woodcock Dr Ste A125
San Antonio, TX 78228

8042 Wurzbach Rd Ste 140

21.23 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
8042 Wurzbach Rd Ste 140
San Antonio, TX 78229

4411 Medical Drive, Ste 170

21.30 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
4411 Medical Drive, Ste 170
San Antonio, TX 78229

6222 Deiavala #104

21.60 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
6222 Deiavala #104
San Antonio, TX 78249

2406 Commercial Ave Ste 111

21.84 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
2406 Commercial Ave Ste 111
San Antonio, TX 78221

12703 Mountain Air Ste 105

21.94 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
12703 Mountain Air Ste 105
San Antonio, TX 78249

3355 Cherry Ridge St Ste 103b

22.54 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
3355 Cherry Ridge St Ste 103b
San Antonio, TX 78230

5222 De Zavala Rd Ste 304

22.74 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
5222 De Zavala Rd Ste 304
San Antonio, TX 78249

12651 Vance Jackson Rd Ste 114

22.89 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
12651 Vance Jackson Rd Ste 114
San Antonio, TX 78230

343 W Houston St Ste 308

23.47 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
343 W Houston St Ste 308
San Antonio, TX 78205

1303 Mccullough Ave Ste 136,

23.98 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
1303 Mccullough Ave Ste 136,
San Antonio, TX 78212

400 E Quincy St

23.98 mi
🕑 Testing Hours: Mon–Fri: 8:00 AM-8:00 PM✓ Walk-in with Electronic Donor Pass
400 E Quincy St
San Antonio, TX 78215

710 Augusta St

24.08 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
710 Augusta St
San Antonio, TX 78215

1200 Brooklyn Ave Ste 165

24.08 mi
🕑 Mon–Fri: 8:00 AM – 4:00 PM✓ Walk-in with Electronic Donor Pass
1200 Brooklyn Ave Ste 165
San Antonio, TX 78212

How It Works

Legal DNA test – when needing a DNA test for paternity, child custody or any court ordered purpose a legal DNA test must be performed at a testing center, the child/children and the alleged father will be scheduled to go to one of our many testing centers nationwide with appropriate documentation, identification, and the test will be performed by a qualified DNA test collector who will then send the specimen to a certified AABB laboratory. Results will be available in approximately 10 days after the laboratory receives the specimen.

Non-legal DNA test -this test is performed for informational purposes only, a DNA certified test kit will be sent to the purchaser via regular mail or overnight delivery. The kit will include clear instructions of how to perform the DNA test, the purchaser will utilize an oral fluid swab for the child/children and alleged father. upon completion the specimen will be placed in a prepaid delivery envelope and sent to our AABB certified laboratory. Results will be available in approximately 10 days after the specimens are received at the laboratory. Please remember the non-legal DNA test cannot be used in a court of law or for any legal purpose.

Castroville DNA Testing

DNA Testing Services Available at Our Castroville, TX Labs:

DNA testing can unlock answers to crucial questions. If you're in Castroville, TX, and seeking the truth about familial connections, Accredited Drug Testing Inc offers extensive DNA testing services including paternity testing, ancestry insights, and genetic analysis. Whether you're resolving family law cases, exploring your genealogy, or verifying kinship for immigration purposes, our DNA testing services are tailored to meet your needs. Situated conveniently in Medina County, our facilities employ certified professionals and use AABB accredited labs, guaranteeing precision and trust in your results. Access to our comprehensive DNA testing services can provide the assurance and closure you need. Contact us today to embark on your journey towards clarity and familial understanding.

Testing Types Available:

Legal DNA Testing

Our legal DNA testing services provide accurate and admissible results for court proceedings. Documents and evidence of paternity, custody, and immigration relationships are securely managed, complying with stringent legal standards across Texas.

Non-Legal DNA Testing

Discover personal insights with our non-legal DNA tests, designed for those seeking knowledge. Whether exploring ancestry, verifying sibling or grandparent relationships, or digging into health-related genetic factors, our tests provide clear, confidential outcomes.

How Our DNA Testing Works

Begin your DNA testing journey by scheduling an appointment at one of our Castroville, TX centers. Certified professionals will guide you in seamless DNA sample collection, ensuring privacy and comfort.

Once your genetic markers have been collected, samples are forwarded to our AABB-accredited lab. Advanced DNA profiling techniques and analysis reveal important insights, confirming accurate relationships.

In just 3–5 days, receive your detailed DNA testing results. These are communicated securely, offering clear interpretations to help you better utilize genetic data for personal or legal needs.

Accuracy and Reliability

At Accredited Drug Testing, we prioritize accuracy through AABB accreditation, ensuring every DNA test adheres to the highest quality control measures. Our services guarantee precise genetic testing outcomes reliant on certified lab standards.

Focused on precision, our DNA testing is conducted under stringent guidelines, ensuring results are incredibly accurate. From DNA health testing to forensic analysis, you can trust the careful scrutiny and certification backing our processes.

Common Reasons for DNA Testing in Castroville

Establishing parentage for custody/support.
For cases involving custody or support, our paternity testing delivers irrefutable, court-admissible proof of biological relations to guide judicial decisions, ensuring fair parental duties and consistent financial support.

Confirming familial relationships.
Genetic testing pinpoints familial ties with precision, resolving uncertainties among siblings, grandparents, and other kin. The certainty our DNA analysis provides aids in settling estates and bolstering familial bonds.

Immigration cases requiring proof of biological relationships.
In immigration matters, our genetic testing offers reliable proof needed for visa and citizenship claims. With legally sound results accepted by authorities, the process of family unification is streamlined.

Adoption cases or identifying unknown biological relatives.
Our genealogical DNA test aids adoptees in discovering unknown biological connections, fostering identity clarity through genetic heritage insights, aiding psychological closure, and offering vital health history.

Genealogy and ancestry exploration.
Our DNA analysis services unveil fascinating genealogical roots and diverse ancestral heritage, enriching your cultural understanding through detailed exploration of genetic genealogy and historic migration narratives.

Castroville Legal and Court-Admissible Testing

All DNA tests at Accredited Drug Testing strictly adhere to the legal standards of Medina County. These protocols ensure the results' accuracy and admissibility in Castroville, TX's family law cases, with each DNA profiling carried out in fully accredited labs.

DNA testing is integral in resolving familial matters in Castroville, TX. Our services, compliant with Medina County regulations, assure thorough documentation of DNA sequencing and sample handling to uphold legal integrity and trustworthiness.

Fulfilling Medina County requirements, our DNA testing services in Castroville, TX bring reliability to complex family legal situations. Clients depend on our meticulous DNA test accuracy and documentation for equitable resolution in custody, property, and paternity issues.

Castroville Texas Community Resources

Medina County Probate Court
Handles family law issues and custody disputes that might require court-admissible DNA testing results.

Medina County Clerk's Office
Essential for filing legal documents related to DNA testing outcomes for familial cases in the Castroville region.

Cadena and Martin Law Firm
Expert family law attorneys in Medina County, specializing in legal documentation for DNA testing cases.

Medina Community Resource Center
Offers various community support services including those related to family and health, crucial in DNA testing contexts.

Medina County Health Department
Provides health resources for understanding DNA testing's role in family and community health topics.

Medina Immigration Services
Immigration office offering guidance and assistance on DNA tests needed for family unification and visa processes.

Castroville Drug Testing

Quickly find trusted local drug testing centers in Castroville, TX — fast, convenient, and reliable every time!

Castroville DOT Drug Testing

Quickly find a local DOT drug testing center in Castroville, TX — fast, reliable, convenient nationwide service!

Castroville DNA Testing

DNA testing for legal and non-legal purposes including child support, and child custody around Castroville, TX.

Castroville Industry Training

Including specimen collector training, DER training, reasonable suspicion training and much more in Castroville, TX.v

Castroville Hair Drug Testing

Get fast, accurate hair drug testing at our convenient Castroville, TX locations—results you can trust, every time!

Castroville Alcohol Testing

Fast, reliable alcohol testing to keep your workplace safe and compliant every single day in Castroville, TX.

Castroville Drug Testing Services

Reliable nationwide drug testing services ensuring accuracy, compliance, and quick results for businesses and individuals in Castroville, TX.

Castroville 5 Panel Drug Test

Accurate 5 panel drug testing with fast, confidential results—trusted by Castroville, TX employers and individuals nationwide.

Castroville 10 Panel Drug Test

Comprehensive 10 panel drug testing with fast, reliable results—trusted for Castroville, TX workplace and personal testing needs.

Castroville On Site Drug Testing

Convenient on-site mobile drug testing with fast, reliable results—saving time while keeping your Castroville, TX workplace compliant.

Castroville DOT Physicals

Certified DOT physicals with quick, reliable exams to keep Castroville, TX drivers compliant and on the road with confidence.

DOT Consortium

Join our DOT consortium for hassle-free compliance, random testing management, and reliable driver safety solutions.


Frequently Asked Questions

Yes. Accredited Drug Testing provides access to DNA collection locations nationwide. In most cases, individuals can be scheduled at a site close to their home, workplace, attorney’s office, or court jurisdiction for convenience.
Yes, if it is ordered as a legal paternity DNA test and collected under strict chain-of-custody procedures. During a legal test, each tested party’s identity is verified, the collector documents the handoff of the swabs, and the lab issues a report suitable for court, child support enforcement, and other official proceedings.
Accredited Drug Testing also offers non-legal DNA testing. This option still compares DNA profiles but does not require the same level of identity documentation or chain of custody. These results are for personal knowledge and are typically not intended for courtroom use.
Immigration-related DNA testing is used to confirm a claimed biological relationship, such as parent and child, when other documentation is incomplete or unavailable. Properly collected and documented DNA samples can be submitted as supporting evidence in visa or residency applications.
Most DNA tests use a painless cheek swab (buccal swab). A trained collector swabs the inside of the cheek to collect cells containing each person’s DNA. In legal and immigration cases, this process is witnessed, logged, and sealed to protect the integrity of the results.
Yes. Results are released only to the authorized requesting party, such as the tested adult, legal guardian, attorney, court/probation contact, or designated immigration representative. All results are handled under strict confidentiality and documented securely.
Yes. Accredited Drug Testing provides relationship DNA tests, including grandparent DNA tests, sibling tests, avuncular (aunt/uncle) tests, and other kinship analyses. These tests help establish or confirm a biological relationship when one or both biological parents cannot participate.
In many cases, DNA collection appointments can be arranged quickly to meet legal timelines, court dates, immigration requests, or custody hearings. The collection is performed at an approved location and then sent for laboratory processing.

Customer Reviews

they have made my job much easier

I always have a good experience setting up company driver drug screens through ADT. I'm really happy I found them while searching online, they have made my job much easier.

Exodus Heath - 2/13/2025

Super helpful and courteous

I've had to use this service twice for out of state physicians we've hired and both times it was super easy. Both customer service reps I spoke with were super helpful and courteous. I won't hesitate to use their service again if needed.

Alicia Rau - 6/19/2024

Super Easy!

Super easy to set up an appointment through the phone. They walked me through all the steps and found me a location right near my house. Would definitely recommend!

Aldita Lumaj - 1/17/2025

Friendly and Knowledgeable

I reached out Accredited Drug Testing/Secure Screenings to partner for my drug testing business (Discovery Diagnostics Columbia SC) and the process was extremely easy. I worked with Sicilia who was amazing. She was friendly & knowledgeable, and answer all of my questions with ease.

Kendra Harley - 3/26/2025

Very professional and very quick

Very professional and very quick service to schedule appointments! I am pleased with the services and would definitely recommend using them for any drug testing needs!

Carrie Feerick - 4/19/2025

quick to assist

They are very quick to assist with your orders and they helped when I needed to find a new testing facility.

Gary Matkin - 2/19/2025

ADT is truly the best

Where do I start?!! ADT is truly the best!! I had the pleasure of speaking with Tori today! She was excellent, professional and truly went above and beyond in her kind, compassionate care and commitment to providing me with the best service possible. I was in such a time crunch, but I was able to call, order the test, pay for it over the phone and get the test I needed within the hour. Not only did this put my mind at ease, they saved my job!! I am forever grateful for this team of hard workers, that care, with such great work ethics! Thank you from the very bottom of my heart!!! If you need a drug, alcohol, etc… screening, this team will be your lifesavers!!

Sarah Patterson - 4/8/2025

Kind and very helpful

Called around for hours and posted from company to person and got nowhere and had to fight to get a refund die to there miss information, well save time and sanity Acredited is the ONLY place the person was kind and very helpful, said what I needed and Faith the lady I dealt with made it simple and she did above and beyond everything I needed, as I'm going through a devorse this was a great help and made my day 100 stars from me.

Steven Harrison - 12/19/2024

Great experience

Great experience and great lab. Customer service agent was very helpful.

Jenna Bee - 2/19/2025

Very helpful

They were very helpful in finding a place to get tested on the route back home! They made a difficult time seem easy with no judgement!

Anne Creden - 11/19/2024


(800) 221-4291