Columbia/HCA was a major healthcare company formed in 1994 through the merger of Columbia Healthcare Corporation and HCA Healthcare. It became one of the largest hospital operators in the United States, managing numerous facilities and providing a wide range of medical services. The company faced significant legal challenges in the late 1990s, including allegations of Medicare fraud. In 2000, Columbia/HCA agreed to pay a substantial settlement, which highlighted issues related to healthcare billing practices and regulatory compliance in the industry.