To avoid confusion between the holding company (WebMD Corp.) and its subsidiary (WebMD), WebMD Corp. changes its name to Emdeon.

Emdeon’s divisions are broken into Emdeon Business Services, Emdeon Practice Services, WebMD Health and Porex, a maker of porous plastic products and components used in health care, industrial and consumer applications.

WebMD, now traded publicly, begins its transformation into the Internet giant most people know it as.