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Quest Diagnostics (NYSE: DGX) empowers people to take action to improve health outcomes. Derived from the world's largest database of clinical lab results, our diagnostic insights reveal new avenues to identify and treat disease, inspire healthy behaviors and improve health care management. Quest annually serves one in three adult Americans and half the physicians and hospitals in the United States, and our 47,000 employees understand that, in the right hands and with the right context, our diagnostic insights can inspire actions that transform lives. The company offers physicians the broadest test menu (3,000+ tests), is a pioneer in developing innovative new tests, is the leader in cancer diagnostics, provides anatomic pathology (AP) services, & interpretive consultation through its medical & scientific staff of about 900 M.D.s & Ph.D.s. The company reported 2020 revenues of $9.44 billion. Quest Diagnostics offers the most extensive clinical testing network in the U.S., with laboratories in most major metropolitan areas, & in Mexico, the UK & India. The company also operates four esoteric laboratories, 40 outpatient AP laboratories, & 160 smaller, rapid-response laboratories. Patients may have specimens collected in any of the company’s approximately 2,250 patient service centers. On a typical workday, testing is performed for about 550,000 patients. Quest Diagnostics empowers healthcare organizations & clinicians with state-of-the-art connectivity solutions. The company is the leading provider of pre-employment drugs-of-abuse screening for employers & risk assessment services for the life insurance industry. It is the world’s 2nd largest provider of clinical trials testing for new pharmaceuticals. More information is available at www.questdiagnostics.com. Language Assistance / Non-Discrimination Notice Asistencia de Idiomas / Aviso de no Discriminación 語言協助 / 不歧視通知 www.QuestDiagnostics.com/home/nondiscrimination

Website http://www.questdiagnostics.com
Ticker DGX
Revenue $9.9 billion
Employees 32,409 (17,803 on RocketReach)
Founded 1967
Address 500 Plaza Drive, Secaucus, New Jersey 07094, US
Phone +1 973-520-2700
Fax (787) 744-1750
Technologies
Industry Medical and Diagnostic Laboratories, Medical Testing & Clinical Laboratories, Health Care, Diagnostic testing information and services, Healthcare, Health Diagnostics, Clinical testing, cancer diagnostics and anatomic pathology serv, Information Services, Gene-based and other esoteric testing, Information Technology, Healthcare information technology solutions
Web Rank 8530
Web Visits 5 Million
Keywords Diagnostic Testing, Clinical Lab, Lab Services, Medical Testing, Clinical Testing, Lab Testing, Diagnostic Services, Lab Testing Services, Medical Diagnostics, Clinical Diagnostics, Healthcare Diagnostics, Health Diagnostics, Diagnostic Solutions, Health Testing, Diagnostic Medicine, Disease Detection, Patient Diagnostics, Disease Diagnostics, Diagnostic Imaging
Competitors Oracle Health Information, Mayo Clinic Laboratories, Labcorp, Geisinger, Eurofins, PerkinElmer, Inc., BioReference Laboratories, Sonic Healthcare, PAML +30 more (view full list)
SIC SIC Code 807 Companies, SIC Code 80 Companies
NAICS NAICS Code 6215 Companies, NAICS Code 62 Companies, NAICS Code 621 Companies, NAICS Code 62151 Companies

Quest Diagnostics Questions

The Quest Diagnostics annual revenue was $9.9 billion in 2026.

Jim Davis is the Chief Executive Officer and President of Quest Diagnostics.

17,803 people are employed at Quest Diagnostics.

Quest Diagnostics is based in Secaucus, New Jersey.

The NAICS codes for Quest Diagnostics are [6215, 62, 621, 62151].

The SIC codes for Quest Diagnostics are [807, 80].

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