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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
Discover Quanum Healthcare IT Solutions

Optimize business and clinical outcomes

Helping healthcare organizations improve the efficiency of care delivery with technology that connects data to decision-making in tangible, value-creating ways.
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Lab Management

Learn about solutions for lab excellence

Help your system deliver the benefits of diagnostic excellence every day.
Physicians using Quest’s clinical testing services

The Quest Diagnostics difference

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

About us