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.

All collection sites are CLIA-certified - the federal standard for clinical laboratory testing.
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| Monday | 7:00 AM - 3:30 PM |
| Tuesday | 7:00 AM - 3:30 PM |
| Wednesday | 7:00 AM - 3:30 PM |
| Thursday | 7:00 AM - 3:30 PM |
| Friday | 7:00 AM - 3:30 PM |
| Saturday | Closed |
| Sunday | Closed |
TestMark DNA schedules chain-of-custody DNA collections in Modesto at 1541 Florida Ave, Suite 102, Modesto, CA 95350. The site is in the McHenry Medical Building, a medical office building on the campus of Doctors Medical Center of Modesto. TestMark DNA orders the test and books the collection before you visit.
The McHenry Medical Building at 1541 Florida Ave is a three-story, multi-tenant medical office building on the campus of Doctors Medical Center of Modesto, and TestMark DNA's collection site is its Suite 102. The hospital's own address is 1441 Florida Avenue, so look for the separate office building numbered 1541 rather than heading to the hospital entrance. Physician practices share the building, including offices of Central Valley Doctors Health System Physician Group, the group formerly known as First California Physician Partners. Before anyone arrives at Suite 102, TestMark DNA orders the legal test, books the collection and issues the chain-of-custody paperwork, so bring the appointment details we send you and plan for each person being tested to be there at the booked time.
When a legal DNA result from this site is needed in a Stanislaus County case, the offices involved are downtown. Family law filings, such as custody and support matters, go through the Family Law Clerk's Office at 1100 I Street, and family law hearings are held in the main courthouse at 800 11th Street, which also houses the court's Self-Help Center. The Stanislaus County Department of Child Support Services works from 251 E. Hackett Road, and its stated mission includes establishing parentage as well as obtaining and enforcing support orders. Its hearings are also held at the 800 11th Street courthouse.
TestMark DNA's Modesto collection site is in Suite 102 of the McHenry Medical Building at 1541 Florida Avenue, on the Doctors Medical Center campus.
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.
Call our team and we'll walk you through the right test, answer your questions, and confirm your nearest location.
(866) 702-7644Visit 1541 Florida Ave Ste 102, Modesto, CA 95350. A quick, painless cheek swab is all that is needed.
Get DirectionsReceive your confidential results delivered securely by email. Results are accurate, private, and legally defensible.
DNA testing at our Modesto, California collection site is straightforward, painless, and typically takes less than 30 minutes. Here is what to know before you visit 1541 Florida Ave Ste 102.
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.
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.
Most visits to 1541 Florida Ave Ste 102 in Modesto take under 30 minutes from check-in through sample collection, including the chain-of-custody paperwork completed in person.
Collection sites in Modesto, 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.
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.
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.
DNA test pricing in Modesto, 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.
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.
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.
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.
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.
Both options available - call to confirm which is right for your situation.
Not sure which test you need? Call for a Free Consultation - (866) 702-7644This Modesto, California collection site serves patients arriving from 95350 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 Modesto.
Each link goes to the city hub with all TestMark DNA collection sites available in that city.
1801 Colorado Ave Suite 310, Turlock, CA 95382
View Hours & Details →1617 N California St, Stockton, CA 95204
View Hours & Details →222 I St, Los Banos, CA 93635
View Hours & Details →1018 Murrieta Blvd, Livermore, CA 94550
View Hours & Details →2400 Balfour Rd Ste 100, Brentwood, CA 94513
View Hours & Details →Get DNA testing in Modesto started today
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