Tenet Healthcare Corp
A US healthcare company operating a large network of acute-care and specialty hospitals across dozens of states, plus hundreds of ambulatory surgery centers run through its USPI arm. It also owns Conifer Health Solutions, which handles medical billing and revenue-cycle services for hundreds of outside clients. Tenet was born in 1995 when two major hospital chains, National Medical Enterprises and American Medical International, merged and adopted a name drawn from the word "tenet" — a core belief or principle.