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Quest Diagnostics

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Making a difference every single day

2,250+

convenient locations across the United States

50 million

tests performed each year for patients of all ages

3,500+

lab tests available to help you find answers

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Save 15%* on tick tests at questhealth.com

Summer is here, and so are the ticks. For when the bugs bite and something doesn’t feel right, test with Quest. Tick-related conditions like Lyme disease and Alpha-gal syndrome can fly under the radar. Get 15% off* Quest tick tests at questhealth.com through June 30 and know where your health stands. *Terms apply.
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FOR ALL YOUR REASONS TODAY AND ALL YOUR TOMORROWS

Keep your lab results in one place with MyQuest®

Having all your lab results in one place makes it easy to discover important patterns and take steps with your doctor to help transform your health—and your future. 

 

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The Latest From Quest

The Quest Diagnostics difference

Bringing together quality, speed, and technology to power advanced, affordable diagnostics for all. No trade-offs required.

About us

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.