Envision Healthcare Corporation operates as a holding company that offers various healthcare services in the USA. It operates through two segments: physician services and ambulatory services. Its physician-led services include emergency departments and hospitalists, anesthesiology, radiology and teleradiology, and children's services. The company also offers ambulatory surgical centers (ASCs) services that provide surgical procedures across multiple specialties, including gastroenterology, ophthalmology, orthopedics, and others. In addition, it provides surgery services, such as management, oversight, and surgeon staffing for trauma surgery services; offers direct patient care and care coordination by clinicians outside the acute care setting through physician-led post-acute care services; and operates office-based medical practices that primarily focus on women’s health, as well as provides physician staffing and related management services. Further, it offers medical transportation services in 41 states and the District of Columbia. The company offers its clinical solutions to health systems, payers, providers, and patients. Envision Healthcare Corporation was formerly known as New Amethyst Corp. and changed its name to Envision Healthcare Corporation in November 2016. Envision Healthcare Corporation was founded in 1977 and is based in Nashville, Tennessee.