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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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US Facilities & Operations International Facilities & Operations

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Southern IL Spine & Joint Ctr (Preferred)

202 W Jackson Square Ste A,

Sparta, IL 62286

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0.85 mi away

618-443-2026
Monday: 8:30 am-5:00 pm
Tuesday: 8:30 am-5:00 pm
Wednesday: 8:30 am-5:00 pm
Thursday: 8:30 am-5:00 pm
Friday: 8:30 am-5:00 pm
Saturday: Closed
Sunday: Closed
Sparta Community Hosp Convenient Care (Preferred)

1300 N Market St,

Sparta, IL 62286

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1.87 mi away

618-443-6228
Monday: 11:30 am-7:00 pm
Tuesday: 11:30 am-7:00 pm
Wednesday: 11:30 am-7:00 pm
Thursday: 11:30 am-7:00 pm
Friday: 11:30 am-7:00 pm
Saturday: 10:00 am-3:00 pm
Sunday: 1:00 pm-5:00 pm
Quest Diagnostics - Belleville

3030 Frank Scott Pkwy W,

Ste 5

Belleville, IL 62223

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33.76 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 - Festus

1463 US Highway 61,

Festus, MO 63028

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36.51 mi away

Schedule Appointment 636-931-6717
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
Clinton M. Smith DC PC (Preferred)

14015 Jamestown Rd,

Breese, IL 62230

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36.78 mi away

618-526-7732
Monday: 8:30 am-10:30 am , 1:00 pm-4:30 pm
Tuesday: 8:30 am-10:30 am , 1:00 pm-4:30 pm
Wednesday: 8:30 am-10:30 am , 1:00 pm-4:30 pm
Thursday: 8:30 am-11:30 am
Friday: 8:30 am-10:30 am , 1:00 pm-4:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Arnold

12 Arnold Mall,

Arnold, MO 63010

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41.64 mi away

Schedule Appointment 636-287-1233
Monday: 7:30 am-4:00 pm
Tuesday: 7:30 am-4:00 pm
Wednesday: 7:30 am-4:00 pm
Thursday: 7:30 am-4:00 pm
Friday: 7:30 am-4:00 pm
Saturday: Closed
Sunday: Closed
SSM Health Express Clinic Centralia (Preferred)

1003 E Mccord St,

Centralia, IL 62801

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42.62 mi away

618-436-6633
Monday: 7:00 am-7:00 pm
Tuesday: 7:00 am-7:00 pm
Wednesday: 7:00 am-7:00 pm
Thursday: 7:00 am-7:00 pm
Friday: 7:00 am-7:00 pm
Saturday: 7:00 am-7:00 pm
Sunday: 11:00 am-5:00 pm
TekSolv, Inc - Collinsville IL (Preferred)

100 Lanter Ct,

Ste 8

Collinsville, IL 62234

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43.0 mi away

618-344-1591
Monday: 6:30 am-2:00 pm
Tuesday: 6:30 am-2:00 pm
Wednesday: 6:30 am-2:00 pm
Thursday: 6:30 am-2:00 pm
Friday: 6:30 am-2:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Mount Vernon IL

4 Cusumano Professional Plaza Dr,

Suite B

Mount Vernon, IL 62864

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43.09 mi away

Schedule Appointment 618-343-5735
Monday: 7:00 am-12:00 pm , 1:00 pm-4:00 pm
Tuesday: 7:00 am-12:00 pm , 1:00 pm-4:00 pm
Wednesday: 7:00 am-12:00 pm , 1:00 pm-4:00 pm
Thursday: 7:00 am-12:00 pm , 1:00 pm-4:00 pm
Friday: 7:00 am-12:00 pm
Saturday: Closed
Sunday: Closed
SSM Health Express Clinic Mt Vernon (Preferred)

602 S 42Nd St,

Mount Vernon, IL 62864

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43.2 mi away

618-899-3278
Monday: 8:00 am-5:00 pm
Tuesday: 8:00 am-5:00 pm
Wednesday: 8:00 am-5:00 pm
Thursday: 8:00 am-5:00 pm
Friday: 8:00 am-5:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Farmington

539 W Karsch Blvd,

Farmington, MO 63640

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43.91 mi away

Schedule Appointment 314-302-8618
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: 7:00 am-1:00 pm
Saturday: Closed
Sunday: Closed
Easy Lab Tech, LLC (Preferred)

2203 N Center St,

Maryville, IL 62062

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44.14 mi away

618-772-7222
Monday: 7:30 am-6:00 pm
Tuesday: 7:30 am-6:00 pm
Wednesday: 7:30 am-6:00 pm
Thursday: 7:30 am-6:00 pm
Friday: 7:30 am-6:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Tesson Kennerly

9950 Kennerly Rd,

Saint Louis, MO 63128

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44.38 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
Mercy Occ Health-South County (Preferred)

12700 Southfork Rd,

Ste 235

Saint Louis, MO 63128

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44.39 mi away

314-729-9995
Monday: 8:00 am-4:30 pm
Tuesday: 8:00 am-4:30 pm
Wednesday: 8:00 am-4:30 pm
Thursday: 8:00 am-4:30 pm
Friday: 8:00 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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44.39 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
Quest Diagnostics - Maryville

2136 Vadalabene Dr,

Ste A

Maryville, IL 62062

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44.66 mi away

Schedule Appointment 618-288-4163
Monday: 6:00 am-3:30 pm
Tuesday: 6:00 am-3:30 pm
Wednesday: 6:00 am-3:30 pm
Thursday: 6:00 am-3:30 pm
Friday: 6:00 am-3:30 pm
Saturday: 7:00 am-1:00 pm
Sunday: Closed
O.D.A.C.S., Inc. (Preferred)

1122 E MAIN ST,

PARK HILLS, MO 63601

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45.5 mi away

573-431-6290
Monday: 9:00 am-3:00 pm
Tuesday: 9:00 am-3:00 pm
Wednesday: 9:00 am-3:00 pm
Thursday: 9:00 am-3:00 pm
Friday: 9:00 am-3:00 pm
Saturday: Closed
Sunday: Closed
Gateway Occupational Health Services (Preferred)

2044 Madison Ave,

Granite City, IL 62040

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46.54 mi away

618-798-3376
Monday: 7:30 am-3:00 pm
Tuesday: 7:30 am-3:00 pm
Wednesday: 7:30 am-3:00 pm
Thursday: 7:30 am-3:00 pm
Friday: 7:30 am-3:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - West Pine

40 N Kingshighway,

Saint Louis, MO 63108

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46.71 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
Ellsworth Chiropractic (Preferred)

3701 Nameoki Rd,

Ste E

Granite City, IL 62040

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47.71 mi away

618-451-8830
Monday: 9:00 am-5:00 pm
Tuesday: 9:00 am-5:00 pm
Wednesday: 9:00 am-5:00 pm
Thursday: 9:00 am-5:00 pm
Friday: 9:00 am-1:00 pm
Saturday: Closed
Sunday: Closed
Alliance Screening & Occ Svcs (Preferred)

714 N Carbon St,

Ste 6

Marion, IL 62959

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48.33 mi away

618-969-9384
Monday: 8:00 am-3:00 pm
Tuesday: 8:00 am-3:00 pm
Wednesday: 8:00 am-3:00 pm
Thursday: 8:00 am-3:00 pm
Friday: 8:00 am-3:00 pm
Saturday: Closed
Sunday: Closed

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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. © 2025 Quest Diagnostics Incorporated. All rights reserved. Image content features models and is intended for illustrative purposes only.