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Quest Diagnostics

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Lab testing, laboratory and office locations around the world

Quest Diagnostics has headquarters in the U.S. and operations in India, Ireland, and Mexico. Our products and services are used by customers in over 130 countries. We also collaborate with many international diagnostic laboratories, hospitals and clinics to help improve human health around the world.

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Quest Diagnostics - Collinsville - Employer Drug Testing Not Offered

1103 Belt Line Rd,

Collinsville, IL 62234

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0.25 mi away

Schedule Appointment 618-344-8376
Monday: 7:00 am-4:00 pm
Tuesday: 7:00 am-4:00 pm
Wednesday: 7:00 am-4:00 pm
Thursday: 7:00 am-4:00 pm
Friday: 7:00 am-4:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Maryville

2136 Vadalabene Dr,

Ste A

Maryville, IL 62062

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3.5 mi away

Schedule Appointment 618-288-4163
Monday: 6:00 am-4:00 pm
Tuesday: 6:00 am-4:00 pm
Wednesday: 6:00 am-4:00 pm
Thursday: 6:00 am-4:00 pm
Friday: 6:00 am-4:00 pm
Saturday: 7:00 am-1:00 pm
Sunday: Closed
Quest Diagnostics - Edwardsville - Employer Drug Testing Not Offered

17 Ginger Creek Mdws,

Glen Carbon, IL 62034

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6.18 mi away

Schedule Appointment 618-201-1397
Monday: 7:00 am-4:00 pm
Tuesday: 7:00 am-4:00 pm
Wednesday: 7:00 am-4:00 pm
Thursday: 7:00 am-4:00 pm
Friday: 7:00 am-4:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Shiloh - Employer Drug Testing Not Offered

1197 Fortune Blvd,

Ste 2

Shiloh, IL 62269

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8.78 mi away

Schedule Appointment 618-628-3975
Monday: 7:00 am-4:00 pm
Tuesday: 7:00 am-4:00 pm
Wednesday: 7:00 am-4:00 pm
Thursday: 7:00 am-4:00 pm
Friday: 7:00 am-4:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Belleville

3030 Frank Scott Pkwy W,

Ste 5

Belleville, IL 62223

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11.06 mi away

Schedule Appointment 618-978-4070
Monday: 6:00 am-4:30 pm
Tuesday: 6:00 am-4:30 pm
Wednesday: 6:00 am-4:30 pm
Thursday: 6:00 am-4:30 pm
Friday: 6:00 am-4:30 pm
Saturday: 7:00 am-1:00 pm
Sunday: Closed
Quest Diagnostics - West Pine

40 N Kingshighway,

Saint Louis, MO 63108

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15.4 mi away

Schedule Appointment 314-240-2665
Monday: 7:00 am-3:30 pm
Tuesday: 7:00 am-3:30 pm
Wednesday: 7:00 am-3:30 pm
Thursday: 7:00 am-3:30 pm
Friday: 7:00 am-3:30 pm
Saturday: 7:00 am-1:00 pm
Sunday: Closed
Quest Diagnostics - Alton

237 E Center Dr,

Ste B

Alton, IL 62002

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19.18 mi away

Schedule Appointment 618-465-5877
Monday: 7:00 am-4:00 pm
Tuesday: 7:00 am-4:00 pm
Wednesday: 7:00 am-4:00 pm
Thursday: 7:00 am-4:00 pm
Friday: 7:00 am-4:00 pm
Saturday: 7:00 am-1:00 pm
Sunday: Closed
Quest Diagnostics - Watson Rd

7345 Watson Rd,

Lower Level Section 2

Saint Louis, MO 63119

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19.58 mi away

Schedule Appointment 314-704-4998
Monday: 7:30 am-5:00 pm
Tuesday: 7:30 am-5:00 pm
Wednesday: 7:30 am-5:00 pm
Thursday: 7:30 am-5:00 pm
Friday: 7:30 am-5:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Florissant

8186 N Lindbergh Blvd,

Florissant, MO 63031

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20.43 mi away

Schedule Appointment 314-972-1300
Monday: 6:30 am-5:00 pm
Tuesday: 6:30 am-5:00 pm
Wednesday: 6:30 am-5:00 pm
Thursday: 6:30 am-5:00 pm
Friday: 6:30 am-5:00 pm
Saturday: 7:00 am-1:00 pm
Sunday: Closed
Quest Diagnostics - Columbia IL

1000 Eleven S,

Ste 2H

Columbia, IL 62236

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20.5 mi away

Schedule Appointment 618-301-0623
Monday: 6:30 am-4:00 pm
Tuesday: 6:30 am-4:00 pm
Wednesday: 6:30 am-4:00 pm
Thursday: 6:30 am-4:00 pm
Friday: 6:30 am-4:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Kirkwood - Employer Drug Testing Not Offered

461 S Kirkwood Rd,

Kirkwood, MO 63122

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23.93 mi away

Schedule Appointment 314-965-8763
Monday: 6:30 am-3:30 pm
Tuesday: 6:30 am-3:30 pm
Wednesday: 6:30 am-3:30 pm
Thursday: 6:30 am-3:30 pm
Friday: 6:30 am-3:30 pm
Saturday: Closed
Sunday: Closed
Macoupin County Chiropractic

704 S Hackman St,

Staunton, IL 62088

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23.96 mi away

618-635-2502
Monday: 9:00 am-12:00 pm , 1:00 pm-5:00 pm
Tuesday: 8:00 am-12:00 pm
Wednesday: 9:00 am-12:00 pm , 1:00 pm-5:00 pm
Thursday: 8:00 am-12:00 pm
Friday: 9:00 am-12:00 pm , 1:00 pm-5:00 pm
Saturday: 7:30 am-11:00 am
Sunday: Closed
Quest Diagnostics - Tesson Kennerly

9950 Kennerly Rd,

Saint Louis, MO 63128

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24.41 mi away

Schedule Appointment 314-842-3693
Monday: 6:30 am-5:30 pm
Tuesday: 6:30 am-5:30 pm
Wednesday: 6:30 am-5:30 pm
Thursday: 6:30 am-5:30 pm
Friday: 6:30 am-5:30 pm
Saturday: 7:00 am-1:00 pm
Sunday: Closed
Quest Diagnostics - Medical Tower New Ballas

621 S New Ballas Rd,

Suite 23

Saint Louis, MO 63141

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24.75 mi away

Schedule Appointment 314-610-5793
Monday: 6:30 am-5:00 pm
Tuesday: 6:30 am-5:00 pm
Wednesday: 6:30 am-5:00 pm
Thursday: 6:30 am-5:00 pm
Friday: 6:30 am-5:00 pm
Saturday: 8:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Center for Performance Med

701 S New Ballas Rd,

Saint Louis, MO 63141

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24.79 mi away

Schedule Appointment 314-913-9951
Monday: 7:00 am-4:30 pm
Tuesday: 7:00 am-4:30 pm
Wednesday: 7:00 am-4:30 pm
Thursday: 7:00 am-4:30 pm
Friday: 7:00 am-4:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Southfork Rd

12700 Southfork Rd,

Ste 150

Saint Louis, MO 63128

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24.79 mi away

Schedule Appointment 314-704-5144
Monday: 6:00 am-5:00 pm
Tuesday: 6:00 am-5:00 pm
Wednesday: 6:00 am-5:00 pm
Thursday: 6:00 am-5:00 pm
Friday: 6:00 am-5:00 pm
Saturday: 7:00 am-12:00 pm
Sunday: Closed

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Our company

Quest® is the brand name used for services offered by Quest Diagnostics Incorporated and its affiliated companies. Quest Diagnostics Incorporated and certain affiliates are CLIA-certified laboratories that provide HIPAA-covered services.  Other affiliates operated under the Quest® brand, such as Quest Consumer Inc., do not provide HIPAA-covered services. 

 

Quest®, Quest Diagnostics®, any associated logos, and all associated Quest Diagnostics registered or unregistered trademarks are the property of Quest Diagnostics. All third-party marks—® and ™—are the property of their respective owners. © 2026 Quest Diagnostics Incorporated. All rights reserved. Image content features models and is intended for illustrative purposes only.