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Quest Diagnostics Locations, Interactive Maps, Phone, Website and More

All Brands » Quest Diagnostics

Quest Diagnostics is a Madison, New Jersey based company that provides clinical laboratory services - namely, lab tests. There are Quest Diagnostics labs in all 50 US states, as well as Brazil, the UK, Mexico, India, and Puerto Rico. Quest Diagnostics is an S&P 500 and Fortune 500 company; it's listed on the New York Stock Exchange as DGX. There are over 2,000 Quest Diagnostics labs, employing over 43,000 technicians altogether. Their most common diagnostic testing services are for cancer, cardiovascular diseases, infectious diseases, and neurological disorders.

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