# QUEST DIAGNOSTICS INC

Summary updated: 2026-10-02T10:34:10.507173Z
Canonical: https://finbar.com/research/companies/quest-diagnostics

## Overview

Quest Diagnostics Inc. is a clinical laboratory and diagnostic information services company that provides testing and related insights to support health decisions by patients, clinicians, and healthcare organizations. Its services span a broad range of diagnostic testing, including cardiometabolic, infectious disease, genetic and genomic, oncology, toxicology, and women’s health testing. The company describes its purpose as “to create a healthier world, one life at a time.” [1](https://app.finbar.com/go?id=P73765371)[2](https://app.finbar.com/go?id=P105989999)[3](https://app.finbar.com/go?id=P75300228)[4](https://app.finbar.com/go?id=P36162523)

Headquartered in Secaucus, New Jersey, Quest operates laboratories, patient service centers, and other facilities across the United States, with selected international operations. It serves customers including physicians, hospitals, patients, health plans, employers, government agencies, and pharmaceutical companies. For FY2025, its latest completed annual reporting year, Quest reported $11.04 billion in revenue and nearly 57,000 employees; its North American network included more than 7,700 patient access points. [5](https://app.finbar.com/go?id=P62053665)[6](https://app.finbar.com/go?id=P76491803)[7](https://newsroom.questdiagnostics.com/2026-02-10-Quest-Diagnostics-Reports-Fourth-Quarter-and-Full-Year-2025-Financial-Results-Provides-Guidance-for-Full-Year-2026-Increases-Quarterly-Dividend-7-5-to-0-86-Per-Share)[8](https://newsroom.questdiagnostics.com/Fact-sheet)
[1](https://app.finbar.com/go?id=P73765371)[2](https://app.finbar.com/go?id=P105989999)[3](https://app.finbar.com/go?id=P75300228)[4](https://app.finbar.com/go?id=P36162523)[5](https://app.finbar.com/go?id=P62053665)[6](https://app.finbar.com/go?id=P76491803)[7](https://newsroom.questdiagnostics.com/2026-02-10-Quest-Diagnostics-Reports-Fourth-Quarter-and-Full-Year-2025-Financial-Results-Provides-Guidance-for-Full-Year-2026-Increases-Quarterly-Dividend-7-5-to-0-86-Per-Share)[8](https://newsroom.questdiagnostics.com/Fact-sheet)[7](https://newsroom.questdiagnostics.com/2026-02-10-Quest-Diagnostics-Reports-Fourth-Quarter-and-Full-Year-2025-Financial-Results-Provides-Guidance-for-Full-Year-2026-Increases-Quarterly-Dividend-7-5-to-0-86-Per-Share)[8](https://newsroom.questdiagnostics.com/Fact-sheet)

## Products & services

Quest Diagnostics’ products and services include routine clinical laboratory testing and Advanced Diagnostics, a portfolio of specialized and technically complex tests. Named areas include molecular diagnostics, including next-generation sequencing, oncology, neurology, companion diagnostics, non-invasive prenatal testing and other genetic testing. The company reported that certain advanced-testing offerings generated more than $1 billion in revenue in 2025, with double-digit growth. [9](https://app.finbar.com/go?id=P27503015)[10](https://app.finbar.com/go?id=P51642814)

Specific offerings include QUEST AD-Detect®, a blood-based portfolio for assessing Alzheimer’s disease risk, and Autoimmune ANAlyzeR™, which supports screening for autoimmune disorders. Haystack Oncology’s minimal residual disease test detects circulating tumor DNA associated with residual or recurring solid tumors; Quest reported a Breakthrough Device designation for its use in early-stage colorectal cancer. QuestHealth.com offers more than 150 consumer tests, including wellness panels covering up to 85 health indicators and tests for chronic-condition monitoring. [11](https://app.finbar.com/go?id=P11191442)[12](https://app.finbar.com/go?id=P88170519)[13](https://app.finbar.com/go?id=P117410243) [14](https://www.questdiagnostics.com/healthcare-professionals/about-our-tests/neurological-disorders/alzheimers) [15](https://testdirectory.questdiagnostics.com/test/home)

Services include employer drug testing and population-health programs such as Blueprint for Wellness®, as well as reference testing and laboratory-management services for hospitals and health systems. Quest’s Collaborative Lab Solutions offerings include lab management, test-menu optimization, spend consolidation, supply-chain support and data solutions. Patients can access services at patient service centers, through mobile phlebotomy in many U.S. areas, and via the MyQuest portal. [16](https://app.finbar.com/go?id=P104582586)[17](https://app.finbar.com/go?id=P65943275)[18](https://app.finbar.com/go?id=P69092162)[19](https://app.finbar.com/go?id=P118104339)[20](https://app.finbar.com/go?id=P12465692) [21](https://www.questdiagnostics.com/business-solutions/employers) [22](https://www.questdiagnostics.com/business-solutions/employers/population-health)

In FY2025, Diagnostic Information Services (DIS) accounted for more than 95% of consolidated revenue; the company does not disclose revenue percentages for individual tests or specialty products. [23](https://app.finbar.com/go?id=P38226148)
[9](https://app.finbar.com/go?id=P27503015)[10](https://app.finbar.com/go?id=P51642814)[11](https://app.finbar.com/go?id=P11191442)[12](https://app.finbar.com/go?id=P88170519)[13](https://app.finbar.com/go?id=P117410243)[14](https://www.questdiagnostics.com/healthcare-professionals/about-our-tests/neurological-disorders/alzheimers)[15](https://testdirectory.questdiagnostics.com/test/home)[16](https://app.finbar.com/go?id=P104582586)[17](https://app.finbar.com/go?id=P65943275)[18](https://app.finbar.com/go?id=P69092162)[19](https://app.finbar.com/go?id=P118104339)[20](https://app.finbar.com/go?id=P12465692)[21](https://www.questdiagnostics.com/business-solutions/employers)[22](https://www.questdiagnostics.com/business-solutions/employers/population-health)[23](https://app.finbar.com/go?id=P38226148)[14](https://www.questdiagnostics.com/healthcare-professionals/about-our-tests/neurological-disorders/alzheimers)[15](https://testdirectory.questdiagnostics.com/test/home)[21](https://www.questdiagnostics.com/business-solutions/employers)[22](https://www.questdiagnostics.com/business-solutions/employers/population-health)

## Geographic presence

Quest Diagnostics is principally focused on the U.S. market, while also serving customers internationally and growing advanced reference testing for laboratory providers in other countries. Its headquarters are in Secaucus, New Jersey, and it operates laboratories, patient service centers, offices and other facilities across the U.S. and in selected locations abroad; the company does not identify those foreign locations or provide a geographic revenue breakdown in the cited disclosures. [24](https://app.finbar.com/go?id=P85975230)[5](https://app.finbar.com/go?id=P62053665)

In the U.S., Quest reports approximately 2,400 patient service centers and about 8,000 patient access points, including phlebotomists in physician offices. [19](https://app.finbar.com/go?id=P118104339)[25](https://app.finbar.com/go?id=T13930305) Its 2025 disclosures also cite approximately 25,000 phlebotomists, paramedics, nurses and other health and wellness professionals, but do not give employee numbers by region or country. [25](https://app.finbar.com/go?id=T13930305)
[24](https://app.finbar.com/go?id=P85975230)[5](https://app.finbar.com/go?id=P62053665)[19](https://app.finbar.com/go?id=P118104339)[25](https://app.finbar.com/go?id=T13930305)[25](https://app.finbar.com/go?id=T13930305)

## Business segments

Quest Diagnostics’ 2025 Form 10-K, filed February 26, 2026, identifies Diagnostic Information Services (DIS) as its only reportable segment. DIS provides diagnostic information services to physicians, hospitals, and patients/consumers; the company describes DS as comprising its other operating segments, rather than as a second reportable segment. [26](https://app.finbar.com/go?id=P2682464)[27](https://app.finbar.com/go?id=P5404305)[28](https://www.sec.gov/Archives/edgar/data/1022079/000102207926000015/dgx-20251231.htm)

For 2025, DIS generated $10.785 billion, or approximately 97.7%, of consolidated net revenues of $11.035 billion. DS generated $250 million, or approximately 2.3%. [29](https://app.finbar.com/go?id=T5279040)

The company also reports revenue by payer type, including healthcare insurers, government payers, client payers, and patients. These are customer categories, not additional reportable segments. [30](https://app.finbar.com/go?id=T5614666)
[26](https://app.finbar.com/go?id=P2682464)[27](https://app.finbar.com/go?id=P5404305)[29](https://app.finbar.com/go?id=T5279040)[29](https://app.finbar.com/go?id=T5279040)[29](https://app.finbar.com/go?id=T5279040)[30](https://app.finbar.com/go?id=T5614666)[30](https://app.finbar.com/go?id=T5614666)[30](https://app.finbar.com/go?id=T5614666)[30](https://app.finbar.com/go?id=T5614666)[30](https://app.finbar.com/go?id=T5614666)[30](https://app.finbar.com/go?id=T5614666)[30](https://app.finbar.com/go?id=T5614666)[30](https://app.finbar.com/go?id=T5614666)[28](https://www.sec.gov/Archives/edgar/data/1022079/000102207926000015/dgx-20251231.htm)

## Company history

Quest Diagnostics traces its origins to 1967, when physician Paul Brown founded Metropolitan Pathology Laboratory (MetPath) in New York. Corning acquired MetPath in 1982, and Quest Diagnostics was incorporated in Delaware in 1990. [31](https://ir.questdiagnostics.com/press-releases/press-release-details/2017/Quest-Diagnostics-50th-Anniversary-Celebrating-a-Half-Century-of-Life-Changing-Results/default.aspx)[32](https://ir.questdiagnostics.com/press-releases/press-release-details/1996/Cornings-Clinical-Laboratories-Spin-Off-to-be-Named-Quest-Diagnostics-Incorporated/default.aspx)[33](https://app.finbar.com/go?id=P51327788) Corning completed the spin-off of Quest Diagnostics to its shareholders on January 2, 1997, establishing it as an independent public company. [34](https://ir.questdiagnostics.com/press-releases/press-release-details/1997/Corning-Incorporated-Completes-Spin-off-of-Quest-Diagnostics-and-Covance-to-Shareholders/default.aspx)

A series of acquisitions broadened the company’s laboratory and diagnostic operations: it acquired SmithKline Beecham’s clinical laboratory business in 1999, AmeriPath in 2007, Athena Diagnostics in 2011, and Solstas Lab Partners in 2014. [35](https://ir.questdiagnostics.com/press-releases/press-release-details/1999/Quest-Diagnostics-Completes-Acquisition-of-SmithKline-Beecham-Clinical-Laboratories/default.aspx)[36](https://ir.questdiagnostics.com/press-releases/press-release-details/2007/Quest-Diagnostics-Reports-Second-Quarter-2007-Results)[37](https://ir.questdiagnostics.com/press-releases/press-release-details/2011/Quest-Diagnostics-Completes-Acquisition-of-Athena-Diagnostics/default.aspx)[38](https://ir.questdiagnostics.com/press-releases/press-release-details/2014/Quest-Diagnostics-Completes-Acquisition-of-Solstas-Lab-Partners-and-Raises-2014-Financial-Guidance/default.aspx) James E. Davis became president and CEO in November 2022 and chairman in April 2023. [39](https://ir.questdiagnostics.com/governance/management-team/default.aspx) In 2024, Quest completed its acquisition of LifeLabs, expanding its operations into Canada. [40](https://ir.questdiagnostics.com/press-releases/press-release-details/2024/Quest-Diagnostics-Completes-Acquisition-of-LifeLabs-Enhancing-Access-to-Diagnostic-Innovation/default.aspx)
[33](https://app.finbar.com/go?id=P51327788)[31](https://ir.questdiagnostics.com/press-releases/press-release-details/2017/Quest-Diagnostics-50th-Anniversary-Celebrating-a-Half-Century-of-Life-Changing-Results/default.aspx)[32](https://ir.questdiagnostics.com/press-releases/press-release-details/1996/Cornings-Clinical-Laboratories-Spin-Off-to-be-Named-Quest-Diagnostics-Incorporated/default.aspx)[34](https://ir.questdiagnostics.com/press-releases/press-release-details/1997/Corning-Incorporated-Completes-Spin-off-of-Quest-Diagnostics-and-Covance-to-Shareholders/default.aspx)[35](https://ir.questdiagnostics.com/press-releases/press-release-details/1999/Quest-Diagnostics-Completes-Acquisition-of-SmithKline-Beecham-Clinical-Laboratories/default.aspx)[36](https://ir.questdiagnostics.com/press-releases/press-release-details/2007/Quest-Diagnostics-Reports-Second-Quarter-2007-Results)[37](https://ir.questdiagnostics.com/press-releases/press-release-details/2011/Quest-Diagnostics-Completes-Acquisition-of-Athena-Diagnostics/default.aspx)[38](https://ir.questdiagnostics.com/press-releases/press-release-details/2014/Quest-Diagnostics-Completes-Acquisition-of-Solstas-Lab-Partners-and-Raises-2014-Financial-Guidance/default.aspx)[39](https://ir.questdiagnostics.com/governance/management-team/default.aspx)[40](https://ir.questdiagnostics.com/press-releases/press-release-details/2024/Quest-Diagnostics-Completes-Acquisition-of-LifeLabs-Enhancing-Access-to-Diagnostic-Innovation/default.aspx)

## Sources

1. [QUEST DIAGNOSTICS INC — Full financial report (2025 Y)](https://app.finbar.com/go?id=P73765371)
2. [QUEST DIAGNOSTICS INC — Full financial report (2025 Y)](https://app.finbar.com/go?id=P105989999)
3. [QUEST DIAGNOSTICS INC — Full financial report (2025 Y)](https://app.finbar.com/go?id=P75300228)
4. [QUEST DIAGNOSTICS INC — Full financial report (2025 Y)](https://app.finbar.com/go?id=P36162523)
5. [QUEST DIAGNOSTICS INC — Full financial report (2025 Y)](https://app.finbar.com/go?id=P62053665)
6. [QUEST DIAGNOSTICS INC — Full financial report (2025 Y)](https://app.finbar.com/go?id=P76491803)
7. [newsroom.questdiagnostics.com](https://newsroom.questdiagnostics.com/2026-02-10-Quest-Diagnostics-Reports-Fourth-Quarter-and-Full-Year-2025-Financial-Results-Provides-Guidance-for-Full-Year-2026-Increases-Quarterly-Dividend-7-5-to-0-86-Per-Share)
8. [newsroom.questdiagnostics.com](https://newsroom.questdiagnostics.com/Fact-sheet)
9. [QUEST DIAGNOSTICS INC — Full financial report (2025 Y)](https://app.finbar.com/go?id=P27503015)
10. [QUEST DIAGNOSTICS INC — Full financial report (2025 Y)](https://app.finbar.com/go?id=P51642814)
11. [QUEST DIAGNOSTICS INC — Full financial report (2025 Y)](https://app.finbar.com/go?id=P11191442)
12. [QUEST DIAGNOSTICS INC — Full financial report (2025 Y)](https://app.finbar.com/go?id=P88170519)
13. [QUEST DIAGNOSTICS INC — Full financial report (2025 Y)](https://app.finbar.com/go?id=P117410243)
14. [www.questdiagnostics.com](https://www.questdiagnostics.com/healthcare-professionals/about-our-tests/neurological-disorders/alzheimers)
15. [testdirectory.questdiagnostics.com](https://testdirectory.questdiagnostics.com/test/home)
16. [QUEST DIAGNOSTICS INC — Full financial report (2025 Y)](https://app.finbar.com/go?id=P104582586)
17. [QUEST DIAGNOSTICS INC — Full financial report (2025 Y)](https://app.finbar.com/go?id=P65943275)
18. [QUEST DIAGNOSTICS INC — Full financial report (2025 Y)](https://app.finbar.com/go?id=P69092162)
19. [QUEST DIAGNOSTICS INC — Full financial report (2025 Y)](https://app.finbar.com/go?id=P118104339)
20. [QUEST DIAGNOSTICS INC — Full financial report (2025 Y)](https://app.finbar.com/go?id=P12465692)
21. [www.questdiagnostics.com](https://www.questdiagnostics.com/business-solutions/employers)
22. [www.questdiagnostics.com](https://www.questdiagnostics.com/business-solutions/employers/population-health)
23. [QUEST DIAGNOSTICS INC — Full financial report (2025 Y)](https://app.finbar.com/go?id=P38226148)
24. [QUEST DIAGNOSTICS INC — Full financial report (2025 Y)](https://app.finbar.com/go?id=P85975230)
25. [QUEST DIAGNOSTICS INC — Full financial report (2025 Y)](https://app.finbar.com/go?id=T13930305)
26. [QUEST DIAGNOSTICS INC — Full financial report (2025 Y)](https://app.finbar.com/go?id=P2682464)
27. [QUEST DIAGNOSTICS INC — Full financial report (2025 Y)](https://app.finbar.com/go?id=P5404305)
28. [www.sec.gov](https://www.sec.gov/Archives/edgar/data/1022079/000102207926000015/dgx-20251231.htm)
29. [QUEST DIAGNOSTICS INC — Full financial report (2025 Y)](https://app.finbar.com/go?id=T5279040)
30. [QUEST DIAGNOSTICS INC — Full financial report (2025 Y)](https://app.finbar.com/go?id=T5614666)
31. [ir.questdiagnostics.com](https://ir.questdiagnostics.com/press-releases/press-release-details/2017/Quest-Diagnostics-50th-Anniversary-Celebrating-a-Half-Century-of-Life-Changing-Results/default.aspx)
32. [ir.questdiagnostics.com](https://ir.questdiagnostics.com/press-releases/press-release-details/1996/Cornings-Clinical-Laboratories-Spin-Off-to-be-Named-Quest-Diagnostics-Incorporated/default.aspx)
33. [QUEST DIAGNOSTICS INC — Full financial report (2024 Y)](https://app.finbar.com/go?id=P51327788)
34. [ir.questdiagnostics.com](https://ir.questdiagnostics.com/press-releases/press-release-details/1997/Corning-Incorporated-Completes-Spin-off-of-Quest-Diagnostics-and-Covance-to-Shareholders/default.aspx)
35. [ir.questdiagnostics.com](https://ir.questdiagnostics.com/press-releases/press-release-details/1999/Quest-Diagnostics-Completes-Acquisition-of-SmithKline-Beecham-Clinical-Laboratories/default.aspx)
36. [ir.questdiagnostics.com](https://ir.questdiagnostics.com/press-releases/press-release-details/2007/Quest-Diagnostics-Reports-Second-Quarter-2007-Results)
37. [ir.questdiagnostics.com](https://ir.questdiagnostics.com/press-releases/press-release-details/2011/Quest-Diagnostics-Completes-Acquisition-of-Athena-Diagnostics/default.aspx)
38. [ir.questdiagnostics.com](https://ir.questdiagnostics.com/press-releases/press-release-details/2014/Quest-Diagnostics-Completes-Acquisition-of-Solstas-Lab-Partners-and-Raises-2014-Financial-Guidance/default.aspx)
39. [ir.questdiagnostics.com](https://ir.questdiagnostics.com/governance/management-team/default.aspx)
40. [ir.questdiagnostics.com](https://ir.questdiagnostics.com/press-releases/press-release-details/2024/Quest-Diagnostics-Completes-Acquisition-of-LifeLabs-Enhancing-Access-to-Diagnostic-Innovation/default.aspx)

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