DNA testing collection site in Calexico, California

DNA Testing in Calexico, California - 425 E 1st Street Suite 3

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Location

TestMark DNA - Calexico

425 E 1st Street Suite 3

Calexico, CA 92231

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Hours of Operation

Monday	6:30 AM - 2:30 PM
Tuesday	6:30 AM - 2:30 PM
Wednesday	6:30 AM - 2:30 PM
Thursday	6:30 AM - 2:30 PM
Friday	6:30 AM - 2:30 PM
Saturday	Closed
Sunday	Closed

In Calexico, TestMark DNA schedules legal (chain-of-custody) DNA collections at 425 E 1st Street, Suite 3, Calexico, CA 92231. The suite is downtown, less than a quarter mile east of the Calexico West port of entry at 200 E First Street. TestMark DNA orders the test and books the collection time before you go.

Less than a quarter mile east of the Calexico West port of entry, Suite 3 at 425 E 1st Street sits on the downtown street that follows the international line, with Mexicali's Avenida Cristóbal Colón less than 150 meters to the south. Heber Avenue, which runs north past SDSU Imperial Valley's Calexico campus at 720 Heber Ave, passes within a block of the building. TestMark DNA orders each legal test, books the collection time at this suite and prepares the chain-of-custody paperwork, so every adult in the case should arrive with photo ID and that paperwork ready. The other TestMark DNA sites in Imperial County lie north in El Centro, Imperial and Brawley, making this suite the closest one to the border for families split between Calexico and Mexicali.

Drivers coming off Interstate 8 usually take Route 111 south into Calexico, turn east on Route 98, then head south on Heber Avenue toward 1st Street, the same route SDSU Imperial Valley gives for its campus, which you pass on the way. Imperial Valley Transit's Calexico stop, also used by intercity buses, is at 220 E 3rd St. Court paperwork tends to point north to El Centro: the El Centro Courthouse at 939 West Main Street houses the court's self-help Access Center for paternity and child support matters, and the Imperial County Department of Child Support Services is at 2795 South 4th Street.

TestMark DNA's Calexico collection site is Suite 3 at 425 East 1st Street, a short walk east of the downtown border crossing.

DNA testing requirements in California

California does not require a prescription or doctor's order for a DNA paternity test. Parentage is established either by both parents signing a Voluntary Declaration of Parentage, which is administered by the California Department of Child Support Services under Family Code sections 7570 to 7577 and must be witnessed by an authorized agency such as a birthing hospital, a local child support office or a registrar of births, or by court-ordered genetic testing under Family Code section 7550 and following. For a result to be used in a California court, the test has to be run by an accredited laboratory with a completed chain-of-custody form, which means collection happens at a certified site and every person tested shows government ID. A home kit answers the question privately but is not accepted for child support, custody or a birth certificate change. Call if you are not sure which one applies to you.

About this Calexico collection site

Opens as early as 6:30 AM on weekdays.
One of 3 TestMark DNA collection sites in Imperial County.
The next closest site is 12 miles away in Imperial, at 2435 Marshall Ave.

How It Works

Call for a Free Consultation

Call our team and we'll walk you through the right test, answer your questions, and confirm your nearest location.

(866) 702-7644

Visit Your Local Collection Site

Visit 425 E 1st Street Suite 3, Calexico, CA 92231. A quick, painless cheek swab is all that is needed.

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Get Results in 3-5 Business Days

Receive your confidential results delivered securely by email. Results are accurate, private, and legally defensible.

What to Expect at Your Appointment

DNA testing at our Calexico, California collection site is straightforward, painless, and typically takes less than 30 minutes. Here is what to know before you visit 425 E 1st Street Suite 3.

Bring a Government-Issued ID

Adults bring a driver's license, state ID, or passport. Children under 18 do not need ID. A birth certificate is helpful for legal tests but not required for personal tests.

The Sample Is a Painless Cheek Swab

Collection takes about a minute. A trained technician rubs a soft cotton swab on the inside of the cheek for each tested party. No needles, no blood, no fasting required.

Plan for 15–30 Minutes on Site

Most visits to 425 E 1st Street Suite 3 in Calexico take under 30 minutes from check-in through sample collection, including the chain-of-custody paperwork completed in person.

Your Collection Is Scheduled by TestMark DNA

Collection sites in Calexico, California handle chain-of-custody (legal) tests ordered through TestMark DNA. We recommend scheduling your visit so everyone arrives prepared: call (866) 702-7644 and we'll confirm the right test, book your collection, and tell you what ID to bring.

Children Can Be Tested at Any Age

Infants, toddlers, and minors are all eligible. The cheek swab is the same regardless of age. For legal tests involving a minor, the custodial parent or legal guardian must be present to sign the chain-of-custody form.

Results Arrive in 3–5 Business Days

Once all samples are received at the accredited laboratory, standard turnaround is 3 to 5 business days. Results are delivered confidentially by encrypted email or secure portal. They are never released over the phone.

Questions before you visit? Call (866) 702-7644 for a free consultation.

Pricing & Payment

DNA test pricing in Calexico, California depends on the specific test you need. Call TestMark DNA for a free consultation. We will confirm the exact price for your situation before you visit the collection site.

Pricing Varies by Test Type

Paternity, maternity, sibling, grandparent, immigration, and home kit tests are each priced differently. Legal (court-admissible) tests cost more than personal-knowledge tests because they include chain-of-custody documentation.

Not Covered by Health Insurance

DNA paternity and relationship testing is classified as a non-medical test and is not reimbursed by health insurance plans. Payment is collected directly at the time of testing.

Free Consultation

We walk you through pricing on the phone before you commit. There is no charge to call, no charge to ask questions, and no obligation to book a test after the consultation.

Discounts for Multiple Parties

Tests that involve additional parties (for example, a paternity test that also includes the mother, or sibling tests with multiple siblings) often qualify for a per-person discount. Confirm by phone before your appointment.

Get an exact quote for your test in under five minutes. Call (866) 702-7644.

Frequently Asked Questions

Where can I get a DNA paternity test in Calexico, California?

TestMark DNA has a certified collection site at 425 E 1st Street Suite 3, Calexico, California 92231. We schedule chain-of-custody (legal) collections here for you, and results are typically returned in 3 to 5 business days.

Do I need a doctor's order or court order for DNA testing in California?

A doctor's order is generally not required. However, if you are a New York State resident, a prescription, court order, or ordering by other authorized persons is required by state law for all DNA identity or relationship tests.

Can DNA testing be done without the mother present?

Yes. A DNA paternity test can be performed without a sample from the child's biological mother. Including the mother's sample is preferred when possible as it improves accuracy.

How long do DNA test results take near Calexico?

Results for a standard DNA paternity test are typically returned within 3 to 5 business days from when all samples are received at the laboratory.

Is DNA testing confidential?

Yes. All samples are packaged in tamper-proof bags and processed at an accredited laboratory with restricted access. Results are shared only with authorized individuals and are never released over the phone.

What type of sample is collected for a DNA test?

The standard sample is a buccal swab - a cotton swab rubbed gently inside the inner cheek. It is painless, non-invasive, and provides the same accuracy as a blood sample.

Will DNA test results be accepted in court?

Results from a legal DNA paternity test performed at an accredited facility may be accepted in court, provided the chain-of-custody form was completed according to laboratory guidelines. Non-legal test results are not intended for court use.

Is DNA paternity testing covered by health insurance?

DNA paternity testing is considered a non-medical test and is not covered by health insurance plans.

Is there a DNA collection site near the downtown Calexico border crossing?

Yes. TestMark DNA schedules legal DNA collections at 425 E 1st Street, Suite 3, on the same street as the Calexico West port of entry (200 E First Street) and less than a quarter mile east of it. TestMark DNA orders the test and books the collection time before anyone travels to the suite.

Legal vs Personal DNA Testing

LEGAL

Legal DNA Test

Court-admissible results
Chain-of-custody documentation
Government ID required at collection
Results accepted in legal proceedings
Collected at certified site only

PERSONAL

Personal DNA Test

For personal knowledge only
No chain of custody required
No ID required
Results not for legal use
Can collect samples at home

Both options available - call to confirm which is right for your situation.

Not sure which test you need? Call for a Free Consultation - (866) 702-7644

Service Area

This Calexico, California collection site serves patients arriving from 92231 and the surrounding ZIP codes listed below. If you are closer to a neighboring city, our nearby TestMark DNA locations may be a shorter drive.

We schedule collections for customers from any ZIP code. The list above reflects the nearest service area for Calexico.

Other Nearby Cities Served

Each link goes to the city hub with all TestMark DNA collection sites available in that city.

Get DNA testing in Calexico started today

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