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 50,000 employees understand that, in the right hands and with the right context, our diagnostic insights can inspire actions that transform lives.
Quest is listed on the New York Stock Exchange (NYSE) under ticker symbol DGX.
Did you know stress can complicate blood test results? That’s why we do everything we can to make you feel as comfortable as possible.