# Quest Diagnostics

> Quest Diagnostics is a public diagnostic information services company whose national laboratory, logistics, patient-service and digital network turns specimens into clinical answers. It serves patients and consumers, physicians, hospitals, health plans, employers and life-sciences companies with routine and advanced testing, lab operations, analytics and population-health services, generating $11.035 billion in 2025 revenue.

- **Founded:** 1967
- **Headquarters:** Secaucus, United States
- **Founders:** Paul A. Brown, M.D. (Founder of MetPath, the predecessor to Quest Diagnostics)
- **Team size:** Nearly 57,000 employees as reported in 2026 company releases
- **Products:** Routine and advanced clinical testing, MyQuest, Quest AI Companion, Quest Health, Quanum Lab Services Manager
- **Notable:** Serves one in three U.S. adults annually and half of U.S. physicians and hospitals., Reported $11.035 billion in 2025 revenue and $1.89 billion in cash from operations., Built a test directory spanning more than 3,500 laboratory tests, including more than 1,500 esoteric options.

## Products & services

- **Routine and advanced clinical testing** — A menu of more than 3,500 laboratory tests spanning routine diagnostics and specialties including oncology, genetics, neurology, infectious disease, women's health, toxicology and cardiometabolic medicine.
- **MyQuest** — A secure patient app and portal for scheduling, results, bills and longitudinal health information.
- **Quest AI Companion** — A Gemini-powered feature within MyQuest that explains and analyzes up to five years of a user's Quest results for discussion with a healthcare provider.
- **Quest Health** — A consumer storefront offering more than 150 self-purchased lab tests with clinical oversight where required.
- **Quanum Lab Services Manager** — Digital workflow for clinicians and office staff to order tests, view results, receive alerts and manage supplies.
- **Haystack MRD** — A tumor-informed blood test designed to detect circulating tumor DNA for minimal residual disease assessment in solid tumors.
- **Health system and Co-Lab solutions** — Reference testing, outreach acquisitions, lab management, optimization and collaborative operating models for hospitals and health systems.
- **Workforce and population health** — Drug testing, biometric screening, occupational health, vaccinations and health-improvement programs for employers and health-plan partners.
- **Biopharma services** — Biomarker, assay-development and laboratory support across drug discovery, clinical trials and commercialization.

## Achievements

- Serves one in three U.S. adults annually and half of U.S. physicians and hospitals.
- Reported $11.035 billion in 2025 revenue and $1.89 billion in cash from operations.
- Built a test directory spanning more than 3,500 laboratory tests, including more than 1,500 esoteric options.
- Named to Fortune's World's Most Admired Companies list for a twelfth consecutive year in 2026.
- Expanded consumer access through a national patient-service network, at-home options, MyQuest and more than 150 self-purchased tests on Quest Health.
- Developed advanced positions in oncology, neurology, genetics, cardiometabolic testing, toxicology and population health.

## Latest updates

- **2026-07** — Reported second-quarter revenue of $3.04 billion, up 10.2% year over year, and raised 2026 revenue guidance to $11.95 billion to $12.05 billion.
- **2026-06** — Published its 2025 Corporate Responsibility Report covering healthcare access, employee engagement and environmental sustainability.
- **2026-06** — Quest and Hackensack Meridian CDI reported findings from a national study of antimicrobial resistance in bacteria causing urinary tract infections.
- **2026-03** — Introduced Quest AI Companion inside MyQuest, powered by Google's Gemini models.
- **2026-01** — Completed its Corewell Health laboratory joint venture transaction in Michigan.
- **2026-01** — Was named to Fortune's World's Most Admired Companies list for the twelfth consecutive year.

## Links

- Website: https://www.questdiagnostics.com/
- LinkedIn: https://www.linkedin.com/company/quest-diagnostics
- Twitter/X: https://twitter.com/QuestDX
- YouTube: https://www.youtube.com/user/QuestDiagnosticsTV
- Instagram: https://www.instagram.com/questdx/
- Facebook: https://www.facebook.com/questdiagnostics/

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Profile page: https://yespress.io/quest-diagnostics
Published by YesPress — https://yespress.io
Last updated: 2026-08-13