Quest Diagnostics at 8538 Ih-35 South, San Antonio, TX
Quest Diagnostics patient service center, 7 miles from downtown San Antonio. Open Mon–Fri 6:30AM – 12:00PM & 1:00PM – 4:00PM · Sat 6:30AM – 11:30AM & 12:00PM – 2:00PM · Sun closed. Order your tests on TestWell, choose Quest at checkout, and walk in with the emailed requisition and a photo ID — no doctor's visit, referral or insurance; results post to your portal in 1–3 business days. Address, phone and hours were read from the lab's listing on October 10, 2026.
- Address
- 8538 Ih-35 South, San Antonio, TX 78211
- Phone
- 210-209-8452
- Appointment
- Walk-ins at most sites · book on Quest's site to skip the wait
Hours at Quest Diagnostics, 8538 Ih-35 South
As listed by the lab on October 10, 2026; confirm before a holiday or Saturday visit.
| Monday | 6:30AM – 12:00PM & 1:00PM – 4:00PM |
|---|---|
| Tuesday | 6:30AM – 12:00PM & 1:00PM – 4:00PM |
| Wednesday | 6:30AM – 12:00PM & 1:00PM – 4:00PM |
| Thursday | 6:30AM – 12:00PM & 1:00PM – 4:00PM |
| Friday | 6:30AM – 12:00PM & 1:00PM – 4:00PM |
| Saturday | 6:30AM – 11:30AM & 12:00PM – 2:00PM |
| Sunday | Closed |
How to get a blood test at this Quest Diagnostics location
- Choose your tests and check out, picking Quest as your lab. A licensed physician authorizes the order, usually within minutes, and the requisition is emailed to you — one $6 lab processing fee per order, nothing to pay here.
- Come to 8538 Ih-35 South during the hours above with the requisition (on your phone is fine) and a photo ID. Fasting tests are easiest first thing in the morning.
- Results post to your TestWell portal in 1–3 business days with reference ranges and a physician review; download the report to share with your own doctor.
Popular tests drawn at Quest Diagnostics in San Antonio — prices at Quest
The tests Texas customers order most, September 2025 – September 2026, priced for a Quest draw. Plus one $6 fee per order.
| Test | Price at Quest | Share of orders |
|---|---|---|
| TSH + Free T4 | $27.99 | 11.4% |
| Comprehensive Metabolic Panel | $22.99 | 9.5% |
| Tuberculosis (TB) Blood Test | $91.99 | 9.5% |
| CBC with Differential | $21.99 | 7.6% |
| IGF-1 (Insulin-like Growth Factor) | $37.99 | 7.6% |
| Hemoglobin A1c | $21.99 | 5.7% |
Other locations near 8538 Ih-35 South
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Frequently asked questions
- What are the hours at Quest Diagnostics 8538 Ih-35 South in San Antonio?
- Mon–Fri 6:30AM – 12:00PM & 1:00PM – 4:00PM · Sat 6:30AM – 11:30AM & 12:00PM – 2:00PM · Sun closed (as listed by the lab on 2026-10-10). Hours change around holidays — confirm before a Saturday or early-morning visit at 210-209-8452.
- Is Quest Diagnostics 8538 Ih-35 South open on Saturday?
- Yes — Saturday hours are 6:30AM – 11:30AM & 12:00PM – 2:00PM as of 2026-10-10. Saturday mornings fill up; an appointment on Quest Diagnostics's site shortens the wait.
- Do I need an appointment at Quest Diagnostics 8538 Ih-35 South?
- Most Quest Diagnostics patient service centers take walk-ins, and Quest Diagnostics lets you book a time slot on its site, which shortens the wait at busy locations. Bring a photo ID and your requisition — through TestWell it arrives by email within minutes of the physician's authorization, and it is accepted here as written.
- Can I get blood work at this Quest Diagnostics location without a doctor?
- Yes, with a requisition: Quest Diagnostics draws what a requisition orders but does not write orders. Order on TestWell — a licensed physician in our network authorizes it as part of the price, with one $6 lab processing fee per order — choose Quest at checkout, and walk in here. No insurance, referral or office visit; HSA and FSA cards are accepted.
- How much does a blood test cost at Quest Diagnostics in San Antonio?
- Through TestWell the price is the test's listed price plus one $6 fee per order, with nothing to pay at the draw. For example, TSH + Free T4 is $27.99, Comprehensive Metabolic Panel is $22.99, Tuberculosis (TB) Blood Test is $91.99 drawn at Quest Diagnostics. Ordered through a doctor and billed to insurance, your share depends on your plan.
- What is the phone number for Quest Diagnostics 8538 Ih-35 South, San Antonio?
- 210-209-8452. Phone and hours were read from the lab's listing on 2026-10-10.