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Holiday schedule

Our Patient Service Centers will be closed on Friday, July 4, 2025 in observance of the Fourth of July holiday.  Have a healthy, happy holiday.

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Clinical trial design and patient recruitment

Successful clinical trials start with data-driven design and the right patients. Yet many trials still face delays due to slow enrollment, underperforming sites, and limited diversity—challenges that can impact timelines and inflate costs. At Quest Diagnostics, we help sponsors and CROs overcome these obstacles by leveraging our robust lab data, enriched with EHR, claims, and prescription insights. Pinpoint high-potential trial sites, identify experienced principal investigators, and identify qualified patient populations. Paired with our targeted recruitment capabilities, we help enable you to design and execute trials that move faster, perform better, and deliver results.

Find the right sites. Engage the right investigators. Accelerate trial success.

Designing effective clinical trials starts with selecting sites that not only have access to eligible patients, but represent the diverse populations your therapies aim to serve. By leveraging Quest data, we help pinpoint high-opportunity geographies with concentrated, representative patient populations.

And serving more than 50% of US physicians and hospitals nationwide, Quest can identify healthcare providers actively treating your target patients—the same providers who may be well positioned to serve as experienced principal investigators.

Engage the right patients—and their providers—to accelerate trial enrollment

Recruiting the right patients is one of the most critical and challenging elements of clinical trial success. With deep insight into both clinical and demographic data, Quest helps identify individuals who precisely match inclusion and exclusion criteria, ensuring better trial fit and stronger outcomes.

Having served over 378 million patients and earned their trust as a leading diagnostics provider, Quest is uniquely positioned to support direct-to-patient outreach. We help drive trial awareness among eligible participants through secure email and direct mail communications from a trusted brand, delivered on behalf of the sponsor.

And because patients often rely on their physicians for health guidance, we also engage treating providers, equipping them with information to encourage patient participation. This dual outreach strategy helps boost engagement and shorten recruitment timelines

Interested in learning more about our clinical trial design and patient recruitment capabilities?

Speak to a Quest representative.

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Enriched data for more precise site, PI and patient selection

At Quest, we do more than provide lab results, we enhance them. By combining our lab data with insights from EHR, claims, and prescription records—including medication history, procedures, and comorbidities—we deliver a more complete view of patient populations, helping you target the right locations and enroll qualified patients with greater precision.

More tests. More data. Better trials.

Quest performs more than 3,500 tests across key therapeutic areas using a variety of methodologies—generating rich clinical data that supports trial planning and recruitment. The breadth and depth of our data allow us to support a wide range of projects, helping sponsors and CROs optimize trial success.