Quest Diagnostics is a healthcare corporation that provides clinical laboratory services. Quest Diagnostics integrated serves diagnostic testing, information, and services. The Quest Diagnostics operates a demotic network of full-service laboratories, rapid response laboratories, and patient service centers. It has 43,000 employees. It was organized in 1967 having central office in Madison, New Jersey, United States. Steve Rusckowski is the CEO of the organization. Paul Brown originator of the Quest Diagnostics Incorporated. The Diagnostics clinic also has been catalogued on Fortune Magazine’s "World’s Most Admired Companies" since 2008. Quest Diagnostics bought all the labs in 2012 from UMASS Memorial Hospitals. The postal and official address, email address and phone number (helpline) of Quest Diagnostics service center is given above. The helpline of Quest Diagnostics service center may or may not be toll free.