Lab Testing in Houston, TX

Whatever brought you here - a doctor's order, a new job, peace of mind - you can get it done today at any of 44+ test centers across the Houston area. STD panels, wellness bloodwork, drug screens: order online, we send the lab order to the center in 2-3 minutes, and you just walk in and sign in. No appointment, no insurance needed. Results usually in 1-2 business days. Serving Houston since 2008. Houston is a city where you can get almost anything done fast, and lab testing is no exception. Whether your doctor handed you an order, your new job needs a drug screen, or you just want answers about your own health, there are test centers spread from the Inner Loop out through Katy, Sugar Land, The Woodlands, and Pasadena — most a short drive off I-10, I-45, or the 610 Loop. Order online, walk in, and you're usually out in minutes.

🔒 100% confidential ⚡ Same-day testing - no appointment needed 💵 All-in pricing - no fees at checkout, ever 📄 Results usually in 1-2 business days
Not sure which test you need? Talk to a Care Advisor - no pressure, just answers. Since 2008.
(866) 873-0879
Have your ZIP code ready - we'll find your nearest test center and the right test while you're on the phone.
Quest Diagnostics Nearest to you
10837 Katy Fwy Suite 150, Houston, TX 77079
Mon: 8AM-5PM; Tue: 7:30AM-5PM; Wed: 8AM-5PM; Thu: 7:30AM-5PM; Fri: 8AM-5PM
✓ Test at this center Directions
Map showing Quest Diagnostics
Test centers don't accept payment - you pay securely here; the center just does the draw.
Not your spot? See all 44+ test centers near you →
Over 4,500 testing centers nationwide · 48 states, including New York

Testing in Houston - start here

Pick the kind of test you came for. Every option is order-online, walk-in, all-in pricing.
STD Testing in Houston View STD testing → Wellness Testing in Houston View wellness testing → Drug Testing in Houston View drug testing →
🔥 Most ordered in Houston
Basic Health Panel: CBC, CMP, UA, Cholesterol
$169
Comprehensive Testing Panel
$329
9 Panel Drug Test
$99

Getting tested in Houston

Most Houston test centers sit in medical plazas near the major corridors — the Texas Medical Center area off Main Street, Memorial Hermann-adjacent buildings on the west side, and strip-plaza locations along FM 1960 and Westheimer. Parking is nearly always free and on-site; this is Houston, after all.

What happens after you order

We send your lab order electronically to the test center in 2-3 minutes. Nothing to print, nothing to bring - just walk in and sign in.

1Order online

Your lab order form and test code appear in your secure online account with your test center's address.

2We send it ahead

Your lab requisition goes to the test center electronically - usually before you've left the house.

3Walk in & get tested

Sign in at the front desk. Tests usually take 5 minutes or less. Results usually in 1-2 business days.

Questions people in Houston ask us

Every one of these gets asked on the phone daily. No judgment, just answers.

Do I need an appointment?
No. Order online first so your lab order is in the system, then walk in during the test center's business hours and sign in. The visit itself usually takes about five minutes.
How fast will I get results?
Most tests post to your secure online account in usually 1-2 business days. Rapid drug screens are read at the collection site the same day. Specialty and DNA tests take longer - each product page tells you before you buy.
What does "all-in" pricing mean?
The price you see is the price you pay. No draw fees, no physician fees, no surprise bills. Competitors advertise one number and add fees at checkout - we don't.
Is this confidential?
Completely. You order online, nobody calls your home, nothing arrives in the mail, and results go only to your password-protected account. You decide who sees them - including whether your own doctor does.
How do I know which test I need?
Start with what's going on: a symptom, a request from a doctor or employer, or just wanting answers. Each category page walks you through it - and if you'd rather talk it through, our Care Advisors do this all day at (866) 873-0879.
Do Houston test centers get busy?
Mornings before work hours are the rush, especially near the Medical Center and the Galleria. Mid-morning through early afternoon is usually walk-right-in. Your order never expires from waiting a day, and there's no appointment to miss.
Lab testing near Houston