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        Laboratory and Office Locations Around the World

        Quest Diagnostics has headquarters in the U.S. and operations in India, Ireland, and Mexico. Our products and services are used by customers in over 130 countries. We also collaborate with many international diagnostic laboratories, hospitals and clinics to help improve human health around the world.

        United States

        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. Make an appointment at a patient location. Read more about our products and services.

        India

        Through our state-of-the-art laboratory facility in Gurgaon, we provide a range of products and services to physicians, hospitals, life insurance companies and pharmaceutical/biotech companies in India.

        Ireland

        In 2006, the Ireland national health administration engaged with us to help reduce a critical backlog of Pap-based cervical cancer screening tests. Since then, Quest Diagnostics has helped to improve the delivery of timely results for patients and expanded its service offering in Ireland.

        Mexico

        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. We offer domestic and international testing services, including clinical trials, drug screening, life insurance assessments and specialized, complex testing. More about our business in Mexico (in Spanish). 


        Patient Locations

        Choose from approximately 2,000 patient locations across the U.S. Find a location convenient for you – you can even make an appointment.

        Licenses & Accreditations

        Read more about our CLIA (Clinical Laboratory Improvement Amendments) licenses and CAP (College of American Pathologists) accreditation. CAP programs are aligned with international standards.

        Lab Contact Info

        Looking for an address or phone number for a laboratory facility? Click here.

        Headquarters

        Our corporate headquarters are in New Jersey, about 30 miles west of New York City. Administrative offices are also in Lyndhurst, NJ and Collegeville, PA (near Philadelphia).

        500 Plaza Drive
        Secaucus, NJ 07094
        1-800-222-0446

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