Brand Certified
Quest Diagnostics
3.3(342 reviews)
Certified by Quest Diagnostics • Apr 05, 2026
Business Details
4101 Mexico Rd, Saint Peters, MO
63376, United States
Certified by Quest Diagnostics • Apr 05, 2026
(636) 441-2938
Certified by Quest Diagnostics • Apr 05, 2026
https://locations.questdiagnostics.com/mo/saint-peters/4101-mexico-rd
Certified by Quest Diagnostics • Apr 05, 2026
About
Certified by Quest Diagnostics • Apr 05, 2026
Family Medicine
The Quest Diagnostics difference. Bringing together quality, speed, and technology to power advanced, affordable diagnostics for all. No trade-offs required.
Location
Certified by Quest Diagnostics • Apr 05, 2026
Hours
Certified by Quest Diagnostics • Apr 05, 2026
Monday6:00 AM - 5:00 PM
Tuesday6:00 AM - 5:00 PM
Wednesday6:00 AM - 5:00 PM
Thursday6:00 AM - 5:00 PM
Friday6:00 AM - 5:00 PM
Saturday7:00 AM - 1:00 PM
SundayClosed
11/27/20256:00 AM - 5:00 PM
12/25/20256:00 AM - 5:00 PM
1/1/20266:00 AM - 5:00 PM
Reviews
3.3
342 reviews
5 stars
179
4 stars
17
3 stars5
2 stars
13
1 star
128
- JBJason BenoitApr 5, 20265.0I believe I saw Jaunita, I hope I got her name right. She was very welcoming and friendly. I don’t hate needles but I’m also not the biggest fan. I barely felt the needle stick! She was so quick and easy. I would definitely request her anytime I need to go Quest if possible
- MIMary IsbellMar 31, 20265.0I made an online appointment, called at scheduled time immediately. Staff was very pleasant and efficient! I was in and out in a less than 10 minutes. Very pleased!
- ATAnnette TerranMar 29, 20265.0Very easy to schedule an appointment when you arrive sign in was out in 10 minutes. Thanks to the team at St Peters Mo office!
- JMjerry minoffMar 22, 20265.0Our experience with quest labs was fantastic. They took us before our appointment time. The girl that drew our blood was so good. She knew how to handle my husband with dementia. I really appreciate how kind she was.
- BCBre creamerMar 18, 20261.0I had a terrible experience getting my blood drawn here. She was very short with an attitude while confirming my information. She couldn’t get a good draw on my left arm and just kept jamming it into my arm getting frustrated. She was able to get it on my right arm after I insisted she switch but at this point I was already passing out. Didn’t offer me some water or anything and honestly seemed like she couldn’t care less. I get everyone has bad days but when you work in healthcare there’s a level of decorum and care you should hold for patients while handling them.
Frequently Asked Questions About Quest Diagnostics
What do I need to know before I arrive at a Quest Patient Service Center?
Please be aware that when you visit a Quest Patient Service Center:
• Scheduled appointments are strongly encouraged and will receive priority. Please arrive and check in 10 minutes before your appointment time. If you check in more than 10 minutes late for your appointment, you will be served as a walk-in.
• If you walk in, you will have to wait for the next available opening.
Do you accept walk-ins?
Scheduled appointments are strongly encouraged and will receive priority. If you walk in, you will have to wait for the next available opening.
Should I be fasting?
Fasting before a blood draw means you don’t eat or drink anything except water. If your test requires it, don't forget to fast for 8-12 hours before your appointment. If you’re not sure, contact your doctor's office. To learn more about how to prepare for your test, visit QuestDiagnostics.com/patients/get-tested/prepare/fasting for additional fasting information.
What should I bring to my appointment?
Please arrive and check in 10 minutes before your appointment time. If you check in more than 10 minutes late for your appointment, you will be served as a walk-in.
You should bring the following to your appointment:
•A lab order from your doctor. If your doctor did not give you a paper order, check with them to see if they sent it electronically.
•Photo identification listing your first name, last name, and date of birth (for example, a driver's license, government issued photo ID, Passport, or Green Card).
•Current health insurance information.
•Credit, debit, or health savings card. You will be asked to preauthorize payment for any balance due after your insurance is billed.
It’s important to also know if your test requires fasting the day before and/or morning of your appointment. Your healthcare provider should have indicated this on your lab order or during your visit. Learn more about fasting before a lab test.
Note: Childcare is not available and the waiting area is not attended. Some testing protocols, such as drug screenings or pre-employment screenings, have strict rules which do not allow children to accompany the patient during sample collection. If you have questions about your testing protocols, please contact your healthcare professional or employer for additional information.
How do I check in when I arrive?
Sign in using the Check-in kiosk, or if not available, sign the clipboard at the front desk. Please be prepared to present a valid photo ID and insurance information. Be sure to mark the reason for your visit when signing in.
If you were unable to preregister ahead of time, and would like to do so, you may be able to complete the registration process if you arrive a few minutes early at a Quest Patient Service Center that has a Check-in kiosk. When you check in with your mobile number, you may be asked if you want to complete the registration process on your smartphone while you wait.
My doctor told me they would send over an order. Do you have it?
If your doctor said they would send us the order electronically or via fax, there is no need to confirm that we have the order. If we do not have the order, we will call the doctor to obtain it when you arrive at our Quest Patient Service Center. To prevent delays, be sure to visit our location during your doctor’s office hours or obtain a copy of your order from your doctor.
How soon after my visit will my doctor receive my lab test results?
Turnaround times for test results can vary. If you have a MyQuest account, your test results will be delivered to your account as soon as they are available. This can take 2-5 business days from the time the sample is received, depending on your test.
You should always follow up with your doctor to discuss your results.
Brand Certified Facts from Quest Diagnostics
This information is certified by Quest Diagnostics and published from the brand's official system of record. Data is distributed through an enterprise-grade knowledge management platform. Learn more about our data sources
Certified April 05, 2026Yext Knowledge Graph
- Address
- Categories
- Geo coordinates
- Legal business name
- Hours of operation
- Phone number
- Official website
Syndication Network
Approved business data is pushed to 100+ publishers, including: