Company Information

Quest Diagnostics 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 nearly 50,000 employees understand that, in the right hands and with the right context, our diagnostic insights can inspire actions that transform lives.

Generated 2022 revenues of approximately $9.88 billion

Also see our Fact Sheet.

Our Services

We are the world's leading provider of diagnostic information services. We provide information and insights based on an industry-leading menu of routine, non-routine and advanced clinical testing and anatomic pathology testing, and other diagnostic information services. We have strong testing capabilities, including services for the predisposition, diagnosis, treatment and monitoring of cancers and other diseases, and offer advanced tests in many fields, including endocrinology, immunology, neurology and oncology. Increasingly, we are focused on providing solutions and insights to our customers, based on the testing that we perform, the data that we gather and our extensive medical, information and connectivity assets. We believe that offering services, solutions and insights based on a full range of tests, information assets and other capabilities strengthens our market offering, market position and reputation.

    We offer the broadest access in the United States to clinical testing. We maintain a nationwide network of laboratories, including advanced laboratories as well as rapid response laboratories (smaller facilities where we can quickly perform an abbreviated menu of routine tests for customers that require rapid turnaround times). We operate 24 hours a day, 365 days a year. Our nationwide network also includes patient service centers, phlebotomists in physician offices, and our connectivity resources, including call centers and mobile paramedics, nurses and other health and wellness professionals. Our large in-house staff of medical and scientific experts, including medical directors, scientific directors, genetic counselors and board-certified geneticists, provide medical and scientific consultation to healthcare providers and patients regarding our tests and test results, and help them best utilize our services to improve outcomes and enhance satisfaction. We also provide testing (including anatomic pathology) services and medical director services at integrated delivery network (IDN) laboratories.

     We are a leading provider of diagnostic information services for infectious disease, such as COVID-19 (including molecular diagnostic and serology antibody offerings), tuberculosis (e.g., our T.SPOT.TB and Quantiferon offerings) and tick-borne disease (e.g., our Accutix® offering). We strive to be the first to provide diagnostic solutions for emerging infectious diseases (e.g., our offerings for Zika, West Nile Virus, SARS and Influenza A H1N1). We have leading positions in drug monitoring and toxicology, in neurology diagnostics, in advanced cardiovascular diagnostic information services (e.g., our CardioIQ® and Cleveland HeartLab® offerings through our Cardiometabolic Center of ExcellenceTM), and in cancer diagnostics (e.g., our QuestVantage® offerings). We are the largest workplace drug testing provider, testing urine, hair, and oral fluid specimens, and are certified by HHS to perform drug testing using electronic custody and control forms for federally-mandated, safety-sensitive workers.

     We are a leading provider of employer population health services, including biometric screenings, flu shots and related preventative services that leverage clinical data to improve population health outcomes and reduce healthcare spend. Our solutions enable employers to leverage screening insights to identify chronic disease risks, connect employees to needed in-network care, and empower better health. Our offerings include connecting participants to the right care at the right time, such as (i) a program designed to prevent diabetes and other chronic conditions, (ii) a program that enables participants to engage with a board-certified physician about their results and to be guided about actions based on those results, (iii) a mental health assessment program that links participants to virtual support and (iv) a program to facilitate virtual telehealth access to clinical services for participants and adult dependents, with emphasis on reducing risks related to preventable chronic diseases. These services are sold directly to employers and by health plan resellers. In response to the COVID-19 pandemic, we developed and offered COVID-19 return to work services, to assist organizations developing plans for safer workplaces.

     We offer Quanum® health information technology solutions, including our products and national healthcare provider network, to help healthcare organizations and clinicians empower better health by leveraging the power of our significant information assets, including many years of test result data, and our technology prowess, including our history of providing leading information technology for diagnostic information services. Our portfolio of offerings is designed to address analytic, clinical and financial needs. The solutions help healthcare organizations and clinicians analyze and put in context data, and enable them to connect across the healthcare system and engage with their stakeholders. They can enter, share and access clinical information without costly information technology implementation or significant workflow disruption.     

     We offer population health solutions to clinicians, health plans, and IDNs. Our services build on the power of our information assets and data capabilities and help our customers deliver better care to their patient populations by identifying gaps in care in a population, providing clinical solutions to close the gaps and fostering consumer engagement with a solution. For example, Quest Lab StewardshipTM employs machine learning to help clinicians optimize medically-appropriate laboratory test utilization. Our extended care services (e.g., bone density examinations; home collection kits for lab testing) help deliver better care to patient populations by identifying and filling gaps in care for patient populations and by enabling delivery of the most effective healthcare to the right populations and individuals. These services leverage the power of our assets (e.g., our extensive clinical data and data analytics services) and capabilities (e.g., call centers, patient service centers, mobile workforce) and focus on extending the reach of clinician offices beyond their traditional four walls to assess the health of their populations, and doing so when it is convenient for consumers. Once gaps are identified, we engage patients in our retail sites, in home or by telephone, including through our call centers and our mobile capabilities, including highly trained healthcare professionals. In 2022, we enhanced our extended care offering by acquiring Pack Health, which offers patient engagement services that help individuals adopt healthier behaviors to improve outcomes. We also enhanced our diabetic retinopathy screening offering, collaborating with IRIS (Intelligent Retinal Imaging Systems) to offer retinal imaging services in our patient service centers.

    We offer services to pharmaceutical companies. We offer clinical trials testing and have expertise in developing laboratory tests for FDA submission as companion diagnostics and laboratory developed tests for complementary diagnostics, and offer an array of assets and services to support the development of companion diagnostics, including our robust data set and patient services network. We also offer Quest Clinical Trials ConnectTM to help accelerate clinical trials (and thus the speed of drugs to market) through better patient recruitment, involvement and management, and improved physician outreach. In 2022, we also began to offer Pack Health's patient engagement services to our pharma clients.