Quest Diagnostics Provides Diagnostic Testing Services Across the Globe Quest Diagnostics Incorporated is a renowned diagnostic testing, information, and service provider, offering exceptional services to its clients in the United States and other parts of the world. Since its inception in 1967, Quest Diagnostics has remained a leading player in the healthcare sector, and has continued to develop and deliver top-notch diagnostic information services. The company provides a wide range of services, including routine testing, non-routine and advanced clinical testing, anatomic pathology testing, and other diagnostic information services. Quest Diagnostics primarily delivers diagnostic information services under its highly regarded brand, but also via other decorated brands, such as AmeriPath, Dermpath Diagnostics, ExamOne, and Quanum. Through a network of laboratories, patient service centers, phlebotomists, call centers, mobile paramedics, nursing professionals, and other health and wellness professionals, Quest Diagnostics serves various clients, including patients, clinicians, hospitals, independent delivery networks, health plans, employers, direct contract entities, and accountable care organizations. In addition, the company provides risk assessment services for the life insurance industry and extensive IT solutions to healthcare organizations and clinicians. Quest Diagnostics remains headquartered in Secaucus, New Jersey, and continues to provide coveted diagnostic services across the globe.