Quest Diagnostics Locations in San Antonio, Texas

Walk-In Lab provides access to routine lab testing at Quest Diagnostics patient service centers in and around San Antonio.

Order your test online, then visit any of the Quest Diagnostics locations below — no doctor's visit or insurance required.

Find a Quest Diagnostics Location Near You in San Antonio

Browse Quest Diagnostics locations in and around San Antonio. Select a location to view details, get directions, and schedule an appointment if available.

Zip Code or use Your Location

Labs

Hours

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Please call labs to verify their business hours as we do not guarantee their accuracy and are subject to change.

Looking for a different lab? View LabCorp locations in San Antonio or all lab locations in San Antonio.

How Lab Testing Works

Walk-In Lab sells routine lab tests that can be completed at Quest Diagnostics patient service centers near San Antonio.

Purchase Your Test

Purchase your lab test online

Visit a Lab

Visit a participating lab location listed above

Complete Your Test

Complete your test at your convenience

No insurance is required.

Do You Need an Appointment?

Appointments are optional but strongly recommended to reduce wait times.

Labs are typically busiest in the morning, especially for fasting tests.

To schedule:

Select your preferred lab location above
Click "Make Appointment" if available
Bring your lab order and appointment confirmation with you

Please note: Many Quest Diagnostics locations require appointments.

Important Information

Lab Network Rules

LabCorp orders must be completed at LabCorp locations
Quest Diagnostics orders must be completed at Quest locations
Visiting a non-participating facility such as a hospital or clinic may result in additional charges and delays

Home Test Kits

If you purchased a home test kit that requires a blood draw, you will need to visit a local hospital, clinic, or mobile phlebotomy service, as LabCorp and Quest locations do not perform these draws.
For more information: https://www.walkinlab.com/home-test-kits-require-blood-draw

Explore More Quest Diagnostics Locations in Texas

Looking for another area? Browse other cities in Texas to find additional Quest Diagnostics locations near you.