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Holiday schedule

Our Patient Service Centers will be closed on Monday, May 26, 2025 for the Memorial Day Holiday. Have a healthy, happy holiday.

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Quest Diagnostics

Detail

LOCATION INFORMATION


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Detail

We offer broad access to clinical testing services through our national network of laboratories in most major metropolitan areas as well as approximately 2,000 patient locations.

Hours

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  • Tuesday:

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  • Sunday:

Media

As the world’s leading provider of diagnostic information services, our employees work every day to uncover insights about your body that empower you with the information you need to make your healthcare decisions count.

Making a Difference Every Single Day

3M

Tests are performed annually across the nation

2,563

We have locations across the United States

3,000+

Tests available for all kinds of conditions and specialties

491

We serve many different organizations and industries

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.