Quest Diagnostics Public Company

Quest Diagnostics Incorporated is an American clinical laboratory that operates in United States, United Kingdom, Mexico, Brazil, Puerto Rico, and maintains a laboratory in India. The company also maintains collaborative agreements with various hospitals and clinics across the globe. Quest Diagnostics offers access to diagnostic testing services for cancer, cardiovascular disease, infectious disease, and neurological disorders. It also the world's 2nd largest provider of clinical trials testing for new pharmaceuticals.