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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

OWN YOUR HEALTH JOURNEY

Explore Quest Comprehensive Health Profiles, exclusively available for purchase at questhealth.com

Ready to gain valuable health insights? A Quest Comprehensive Health Profile is your simple solution to a holistic health assessment – no doctor visit or insurance required for purchase. Unlock lab tests, a biometric screening, and more that help to deliver insights into your heart health, liver health, diabetes risk, and so much more.
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BUY YOUR OWN QUEST TEST

Still feeling unwell after COVID-19?

Long COVID (also called post-COVID) is when symptoms linger for at least 3 months after a COVID-19 infection has run its course. Symptoms can improve, worsen, change, or even disappear and then come back. 

Learn more in this questhealth.com article featuring 2 Quest test options available for purchase. 

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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.