Quest Diagnostics at 621 S New Ballas Rd, Suite 23, Saint Louis, MO
Quest Diagnostics patient service center, 13 miles from downtown St. Louis. Open Mon–Fri 6:30AM – 5:00PM · Sat 8:00AM – 12:00PM · 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
- 621 S New Ballas Rd, Suite 23, Saint Louis, MO 63141
- Phone
- 314-610-5793
- Appointment
- Walk-ins at most sites · book on Quest's site to skip the wait
Hours at Quest Diagnostics, 621 S New Ballas Rd
As listed by the lab on October 10, 2026; confirm before a holiday or Saturday visit.
| Monday | 6:30AM – 5:00PM |
|---|---|
| Tuesday | 6:30AM – 5:00PM |
| Wednesday | 6:30AM – 5:00PM |
| Thursday | 6:30AM – 5:00PM |
| Friday | 6:30AM – 5:00PM |
| Saturday | 8:00AM – 12:00PM |
| 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 621 S New Ballas Rd, Suite 23 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 St. Louis — prices at Quest
The tests TestWell customers order most nationally, September 2025 – September 2026, priced for a Quest draw. Plus one $6 fee per order.
| Test | Price at Quest | Share of orders |
|---|---|---|
| Comprehensive Metabolic Panel | $22.99 | 9.7% |
| Tuberculosis (TB) Blood Test | $91.99 | 7.6% |
| IGF-1 (Insulin-like Growth Factor) | $37.99 | 6.6% |
| TSH + Free T4 | $27.99 | 5.8% |
| CBC with Differential | $21.99 | 5.6% |
| Hemoglobin A1c | $21.99 | 5.3% |
Other locations near 621 S New Ballas Rd, Suite 23
- Quest Diagnostics0.3 mi
701 S New Ballas Rd, Saint Louis, MO 63141
Weekdays 7:00AM – 4:30PM
- Labcorp1.7 mi
747 N New Ballas Rd, Saint Louis, MO 63141
Weekdays 8:00AM – 4:30PM · Sat 8:00AM – 12:00PM
- Labcorp4.9 mi
12685 DORSETT RD, STE A, Maryland Heights, MO 63043
Weekdays 8:00AM – 4:30PM
- Quest Diagnostics5.2 mi
461 S Kirkwood Rd, Kirkwood, MO 63122
Weekdays 6:30AM – 3:30PM
- Labcorp7.2 mi
1035 Bellevue Ave, Ste 314, Saint Louis, MO 63117
Weekdays 8:00AM – 5:00PM · Sat 8:00AM – 12:00PM
- Labcorp7.3 mi
12255 DE PAUL DR, STE 190, Bridgeton, MO 63044
Weekdays 7:00AM – 5:00PM · Sat 8:00AM – 11:30AM
Frequently asked questions
- What are the hours at Quest Diagnostics 621 S New Ballas Rd in Saint Louis?
- Mon–Fri 6:30AM – 5:00PM · Sat 8:00AM – 12:00PM · Sun closed (as listed by the lab on 2026-10-10). Hours change around holidays — confirm before a Saturday or early-morning visit at 314-610-5793.
- Is Quest Diagnostics 621 S New Ballas Rd open on Saturday?
- Yes — Saturday hours are 8:00AM – 12:00PM 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 621 S New Ballas Rd?
- 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 Saint Louis?
- 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, Comprehensive Metabolic Panel is $22.99, Tuberculosis (TB) Blood Test is $91.99, IGF-1 (Insulin-like Growth Factor) is $37.99 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 621 S New Ballas Rd, Saint Louis?
- 314-610-5793. Phone and hours were read from the lab's listing on 2026-10-10.