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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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Quest Diagnostics - West Pine

40 N Kingshighway,

Saint Louis, MO 63108

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4.26 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 - Tesson Kennerly

9950 Kennerly Rd,

Saint Louis, MO 63128

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6.8 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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7.21 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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7.21 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
ARCpoint Labs of St. Louis West (Preferred)

11255 Olive Blvd,

Saint Louis, MO 63141

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9.32 mi away

314-597-6767
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
Mercy Occ Health-Creve Coeur (Preferred)

11700 Studt Ave,

Saint Louis, MO 63141

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9.66 mi away

314-989-9199
Monday: 8:00 am-4:00 pm
Tuesday: 8:00 am-4:00 pm
Wednesday: 8:00 am-4:00 pm
Thursday: 8:00 am-4:00 pm
Friday: 8:00 am-4:00 pm
Saturday: Closed
Sunday: Closed

Our focus on your safety

Our safety precautions help ensure your confidence and comfort while visiting our Patient Service Centers to get the testing you need, today and every day.

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