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Upcoming holiday closures 

Quest Patient Service Centers will be closed on Friday, July 3 and Saturday, July 4, 2026, in observance of Independence Day, and to give our frontline team the time to recharge. Don't let the holiday interrupt your care. Plan your visit today.

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Quest Diagnostics

Reference testing

Simplify your lab network for greater quality and consistency.

The diagnostics industry continues to evolve at a rapid pace, driving smarter technology and more advanced healthcare solutions. Partner with Quest to optimize low-volume and complex testing across your system while preserving local strengths.

Our esoteric testing expertise, including comprehensive genetics testing, can help you reduce reliance on fragmented send-out arrangements and gain a more coordinated, accountable partner.

Whole-slide imaging enables viewing of patient specimens in new ways, allowing not just faster review but greater diagnostic insight to improve naming, staging, and grading of disease.

Incorporating a secondary lab interface as part of your LIS protocol can help you maintain speed and accuracy if your primary lab has a disruption.

Benefit from accessible testing capabilities

Expand your capabilities with a menu of 3,500+ tests, including industry-leading advanced diagnostics that drive precision medicine, all supported by a fleet of 19 aircraft and 3,800 courier vehicles that cover 96% of the US.

LAB NETWORK OPTIMIZATION

Analyze test menus, locations, and specimen flows to balance cost, turnaround time, and clinical need. 
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Scientist in lab

Centralize reference testing

See how you can expand your capabilities with the strength of Quest. 

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Solutions

Lab testing by specialty

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. © 2026 Quest Diagnostics Incorporated. All rights reserved. Image content features models and is intended for illustrative purposes only.