WebMD is the world's largest medical and health services website and the most popular professional medical website for doctors to pay for. Because WebMD has the most extensive medical health information, a huge collection of clinical reports from doctors across the United States, and the most complete and constantly updated medical database. In short, WebMD has something for everyone, whether you are a health care professional or a member of the general public. In the United States, half of all physicians are already loyal members of WebMD.