More about our business in Mexico (in Spanish).We offer domestic and international testing services, including clinical trials, drug screening, life insurance assessments and specialized, complex testing. With two central labs accredited by the College of American Pathologists (CAP) and approximately 35 patient locations, Quest Diagnostics Mexico is one of the preeminent private clinical laboratories in Mexico City and Ciudad Juarez. Since then, Quest Diagnostics has helped to improve the delivery of timely results for patients and expanded its service offering in Ireland. In 2006, the Ireland national health administration engaged with us to help reduce a critical backlog of Pap-based cervical cancer screening tests. To serve the Brazilian market, we provide information technology and logistics solutions that enable seamless support to healthcare providers and patients. Read more about our products and services.Make an appointment at a patient testing location.We offer broad access to clinical testing services through our national network of laboratories in most major metropolitan areas as well as approximately 2,000 patient locations. We also collaborate with many international diagnostic laboratories, hospitals and clinics to help improve human health around the world. Our products and services are used by customers in over 130 countries. and operations in India, Ireland, and Mexico.

Quest Diagnostics has headquarters in the U.S.

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