Anthony William is the New York Times best-selling author, and a healing authority. He defines himself as the Medical medium (or Medical intuitive) in his written books about natural healing (Medical Medium, Life-Changing Foods, Thyroid Healing, and Liver Rescue). He believes that he received “advanced medical information” as a gift from a " spirit " when he was just 4 years old. Anthony also believes that he is using his gift to "read" people’s conditions and tell them how to recover their health. He also garnered a celebrity clientele , such as Robert De Niro, Naomi Campbell, and Gwyneth Paltrow. His popularity is explained  by the fact that the official medicine and medical sciences, in some cases, cannot explain illness causes, leaving patients debilitated and hopeless.
His methods are not accepted  by medical doctors or licensed healthcare practitioner or providers. His medical recommendations include a disclaimer that emphasizes that anything he says should be reviewed with a medical professional.