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Holiday schedule

Our Patient Service Centers will be closed on Wednesday, December 25, 2024 in observance of Christmas and Wednesday, January 1, 2025 in observance of New Year's Day. Have a healthy, happy holiday.

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Quest Diagnostics

Diagnostic excellence

Everything your physicians need to provide the right test at the right time

Our large—and growing—menu of 3,500+ routine and esoteric tests supports screening, diagnosis, and monitoring, and companion diagnostics for precision medicine. Powered by a test directory organized by therapeutic condition and featuring clinical algorithms to guide optimal test utilization, care professionals can identify the right tests at the right time. And our test library is backed up by clinical diagnostic services designed to help you improve care and manage complexity, including our 650+ MDs, PhDs, and genetic counselors available for peer-to-peer dialogue and our robust Clinical Education Center.

More than 1,500 advanced esoteric diagnostic tests

Challenging cases require more than routine diagnostics. Quest offers an extensive esoteric testing menu, including a comprehensive genetic testing portfolio. Our QuestAdvanced™ offering is dedicated to developing science, thinking, and services to realize the promise of precision health. We continue to help move diagnosis forward through laboratory innovations in the application of next-generation gene sequencing, bioinformatics, mass spectrometry, digital pathology, and proteomics.

Infectious disease/immunology

Leverage our lab-based solutions to minimize the costs and disruption of managing infectious and immunological diseases.

Neurology

We have 500+ immunoassays and genetic tests to help meet the specific needs of your clinicians and patients.

Oncology

With more advanced oncology testing across all subspeciality areas, we can help improve patient outcomes.

Toxicology

We can help with toxicology, therapeutic drug monitoring, metals testing, prescription drug monitoring, and workplace testing.

Women’s health

Our full range of tests support every stage of a woman’s life with important insights, and inspire action to live longer.

Cardiometabolic

Using our tests to discover biomarkers early can dramatically improve the health of patients and health systems alike.

Add us to your clinical team

Connect your clinicians with our medical experts to improve test selection and interpretation.

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Laboratory network optimization

Using multiple reference labs can lead to duplicate services, rising costs, and confusion—none of which is helpful for providing value-based care. Working together, we can optimize your laboratory operating model, recommending the most appropriate solution based on your needs. Our best-of-breed Six Sigma program drives change that can yield improved profit margins.

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Explore our Clinical Education Center

Leverage regularly updated continuing education materials for you and your team. 

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Hospitals & health systems

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. © 2024 Quest Diagnostics Incorporated. All rights reserved. Image content features models and is intended for illustrative purposes only.