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Holiday schedule

Quest Diagnostics Patient Service Centers will be closed on Monday, September 7th, 2026 in observance of the Labor Day Holiday.  Have a healthy, happy holiday.

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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.