Founded in 1967, Quest Diagnostics (DGX) is the leading global provider of diagnostic information services. Headquartered in Madison, New Jersey, the company has a team of 43,000 employees that operate 2,200 patient service centres across the country. Annually, Quest serves one in three adult Americans and half the hospitals and physicians in the USA. Quest Diagnostics delivers diagnostic testing services for neurological disorders, cardiovascular disease, infectious diseases and cancer. With an annual revenue of $7.5 billion the company is included to the S&P 500 index. The Quest Diagnostics share price (DGX) is set and traded on the New York Stock Exchange (NYSE).