By Adela Beasley An internist is a doctor who has had adequate training in matters concerning internal medicine. According to the American college of physicians, an internist is a physician who is specialized in diagnosis and treatment of diseases in adults which seems to be the opposite of a pediatrician who is a person that has specialized in treatment of children. It can be said then that an internist New York is the person who takes over from a pediatrician when an individual reaches a certain age in life. Note that interns are not the...