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Outage notice:

Due to the global information outage that occurred Friday, Quest is taking swift action to respond, recover and restore our operations. Our Patient Services are operating with reduced capacity so you may experience longer wait and service times. Our Customer Contact teams are currently unavailable. We appreciate your patience as we work toward returning to normal operations. 


Lab Expertise

Deep scientific lab experience

We offer a team of recognized industry leaders across every diagnostic testing technology and platform to help ensure your clinical trial assay effectively supports your program goals.
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Medical Expertise

Therapeutic area expertise for your product

Our team of therapeutic area medical directors support deeper understanding of medical conditions, patient populations, and the competitive landscape in specific disease areas, identifying opportunities for therapy innovation and differentiation.
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Precision medicine

Quest is your trusted partner for precision medicine. We work hand in hand to support our partners as they identify, develop and commercialize new precision therapies.

Companion diagnostics

Your assay matters

We combine biomarker assays, regulatory strategy, and commercialization capabilities into an integrated solution to support your companion diagnostic development program.
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Identify and incorporate the right biomarkers for your therapy

Our experts work closely with your team to identify the most appropriate biomarkers for your target therapy. Our extensive domain expertise powers a strategy that ensures the best path to a companion diagnostic and to market.
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Leverage de-identified lab data and clinical insights to illuminate therapeutic programs

Our data scientists and healthcare professionals combine billions of clinical de-identified lab test results with a robust strategy process.
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Decentralized trials

Offer a patient-centric approach to expedite and simplify your clinical trials

Our community ties and many locations help reach more patients for greater diversity and inclusion in trials.
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Leverage sponsored testing to achieve broader reach

Drive launch success with disease and biomarker awareness and education for providers, as well as testing support for their patients.
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Leverage de-identifed lab data and insights to illuminate therapeutic programs

Products and services

You face complex problems when transforming a scientific discovery into a new treatment. Getting that treatment into the hands of patients requires an advisor and partner who is invested at every level. Quest Diagnostics innovative and inventive team of experts continues to guide, solve, improve, and optimize the therapy development process—no matter the obstacles.

Therapeutic area expertise

We help clients with drug development in all major therapeutic areas. Over the years, we’ve built up a world class team with knowledge and expertise in the following areas:

Global footprint

Quest has had an international presence for over 30 years. We collaborate with leading international diagnostic laboratories, hospitals, and healthcare systems. Today, our products and services are used by customers in more than 75 countries.

Quest also leads the Global Diagnostics Network (GDN). The GDN launched in 2018 as a worldwide community of diagnostic laboratories, each committed to unleashing local innovations to generate diagnostic insights and improve global healthcare.

Be part of breakthrough discoveries

Register with Quest Diagnostics to be part of our research database and receive communications about research studies.

Get involved

Let’s discuss your project

Contact our pharma solutions experts to design a custom program to accommodate the needs of your study.

Let's talk