Health care industry is one of the most important sectors that are serving the populations of United States. United States is a global leader in the health care services and an innovator of innovative diagnostics and treatment. The United States has the largest health care service markets in the world, representing a significant portion of the U.S. economy. During 2010, the health care service industry accounted for about $1.75 trillion in revenues and it had employed more than 14 million people. The U.S Bureau of Labor Statistics estimates the growth in the industry would yield another 3.2 million new jobs between 2008 and 2018.