A specialist physician is trained and certified in a specific field and the range of options for specialization is seemingly endless. Examples of specialist physicians include cardiologist, pediatrician, emergency medicine specialist, gynecologist, general surgeon, internal medicine specialist, and neurologist. The educational path of a specialist physician is much like that of a general practitioner. An undergraduate degree, medical school, internship, and residency training are usual requirements. In addition to this, specialist physicians must undergo intensive training in their chosen specialty, and acquire a license in this field. The duration of this training depends on the physician's field and level of specialty.