Quest Diagnostics in Houston
Most-Ordered Tests in Houston
How it works
Ordering a blood test with us is easy, private & backed by the power of science. Long story short:
1
Order your test
Save a trip to the doctor. Your results will come with clear, friendly explanations.
2
Book an appointment
Visit any of our 2,200+ nearby lab locations to have your samples collected.
3
Get results
Receive a clear, easy-to-digest health report by email & SMS within a few business days.
Houston Blood Testing FAQ
How many Quest Diagnostics locations are in Houston?
We work with 25 Quest Lab Locations in Houston, TX. Each one is listed above with address, hours, phone, and a direct booking link.
Do I need an appointment for a blood test in Houston?
No. Most Quest Diagnostics locations in Houston accept walk-ins during business hours. Scheduling an appointment online is recommended to reduce wait times.
What should I bring to the lab?
Bring a valid photo ID and the lab requisition we email you after your order. If your test requires fasting, avoid food and drinks other than water for 8–12 hours before your visit.
How long does a blood draw take?
The draw itself takes about 5 minutes. Most visits, including check-in, are done in 15 minutes or less.
Do I need a doctor's order for lab work in Houston?
No. A licensed physician reviews and approves all lab orders on your behalf — included with every test you order on DiscountedLabs.com. No separate doctor visit needed.
When will I get my results?
Most results are ready in 2–10 business days. Hormone panels using LC/MS may take slightly longer. You'll get a notification by email and SMS as soon as your results are available.
Are Quest Diagnostics labs in Houston open on weekends?
Hours vary by location. Many Quest labs in Houston offer Saturday hours. Check each location card above for specific hours.
Can I use my insurance for lab tests?
Our tests are self-pay and do not require insurance. HSA and FSA cards are accepted.
What types of tests can I order in Houston?
Hundreds of individual blood tests and bundled lab panels — including thyroid, hormones, metabolic, lipid, vitamin levels, cancer markers, and more. Browse our full catalog to find the test you need.
