Quest Diagnostics empowers people to take action to improve health outcomes.
Company Overview

Quest Diagnostics works across healthcare to create a healthier world, one life at a time. We connect people, from clinicians to consumers, with laboratory insights that illuminate a path to better health. With a focus on delivering smarter, simpler testing, we help reveal new avenues to identify and treat disease, empower healthy behaviors and improve healthcare management. Quest Diagnostics serves half the physicians and hospitals in the United States and one in three American adults each year, and our nearly 57,000 employees work together to deliver diagnostic insights that inspire actions to transform lives.

Latest News
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First quarter revenues of $2.90 billion, up 9.2% from 2025, with 9.0% organic revenue growth First quarter reported diluted earnings per share ("EPS") of $2.24, up 15.5% from 2025; and adjusted...

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Fourteen City of Hope sites across the U.S. participating in research using the Haystack MRD ctDNA Test in patients with breast, colorectal, ovarian, and prostate cancer SECAUCUS, N.J. and LOS ANGELES

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Quest Diagnostics Incorporated (NYSE: DGX), a leader in diagnostic information services, announced today that it will report first quarter 2026 financial results on Tuesday, April 21, 2026, before...

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Newsroom

Quest Blog - Empowering better health with diagnostic insights.
Media Coverage
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CBS News Baltimore (WJZ-TV)
A blood test based from a South Baltimore lab is making treatment clearer for cancer patients. HaystackMRD, made by Haystack Oncology within Quest Diagnostics, looks for signs of cancer that conventional methods may miss. While it's been in development for many, many years, the test was made clinically available for oncologists and pharmaceutical partners in late 2024.
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Medical Laboratory Observer
In this exclusive interview, Quest Diagnostics’ Ines Dahne-Steuber discusses their daytime kidney care lab strategy with MLO Editor in Chief, Christina Wichmann.

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Quest Diagnostics Health Trends™

Quest Diagnostics Health Trends™ is a series of reports from Quest Diagnostics on health conditions affecting a large number of Americans. Published in peer-reviewed journals, at scientific conferences and widely as a public service, the reports are designed to inform health care professionals, patients and policymakers about the status of the nation’s health.

 

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At A Glance...

Quest provides thousands of laboratory tests, ranging from advanced genomic tests for cancer and rare diseases to routine preventive tests for heart disease, diabetes and other chronic conditions. Our medical and scientific staff consists of over 700 M.D.s and Ph.Ds. We maintain approximately 7,700 patient access points, including approximately 2,000 Quest patient service centers, and a logistics team with over 4,000 courier vehicles and nearly 20 aircraft in the United States.

Media Resources

Journalists may contact Quest Diagnostics by emailing mediacontact@questdiagnostics.com