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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
07302026

Largest nationally representative study finds 12% of patients positive for bacterial vaginosis are infected with at least one STI, such as chlamydia or gonorrhea SECAUCUS, N.J., July 30, 2026...

07232026

Second quarter revenues of $3.04 billion, up 10.2% from 2025, with 10.0% organic revenue growth Second quarter reported diluted earnings per share ("EPS") of $2.84, up 15.0% from 2025; and...

07102026

Hair test positivity among American workers reached 19.1% in 2025, potentially reflecting recurring or chronic drug use 15.1% of workers screened for drugs using a hair test were positive for...

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Media Coverage
08052026
The Wall Street Journal
Samples—and a certain stink—are accumulating at Quest Diagnostics thanks to the cyclosporiasis outbreak. On a laboratory table that normally sits empty, hundreds of feces samples are arranged in stacks six vials high. They’ve traveled by ground and plane, across seven different eastern U.S. states, for one purpose: to be tested for parasites, including cyclospora. And they’re coming faster than scientists here can test them. At Quest’s Clifton lab, workers are putting in extra hours.
08042026
HealthDay
Women with vaginosis are around three times as likely to also test positive for gonorrhea, chlamydia or other bacterial sexually transmitted infections, a new study says. The study results confirm guidance from the U.S. Centers for Disease Control and Prevention that women being treated for bacterial vaginosis should be tested for STIs, which can present with similar symptoms, researchers said in the journal O&G Open. "STIs can lead to serious reproductive and other health complications when left undetected and untreated,” senior researcher Dr. Damian Alagia said in a news release.

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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