Skip to main content

Making a difference every single day

2,000+

convenient locations across the United States

200+ million

tests performed each year for patients of all ages

3,500+

lab tests available to help you find answers

SAVE 20% ON THYROID TESTS

January is Thyroid Awareness Month

Through January 31, save up to 20% on select thyroid-related tests at questhealth.com. No doctor visit is required for purchase.
Woman doing yoga

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. 

Man coughing

The Quest Diagnostics difference

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

About us