A medical doctor has four years undergraduate, four years of medical school, and several years internships.<quoted text>A Doctor (MD) has 4 years of actual Med school. A Nurse Practitioner has a minimum of 6 years Med school and many have 8 years of Med school. But anything from the FrightWing to get a stir.
Nurse practitioners do not normally have any formal medical school education, only nursing education, often in hospital nursing schools instead of university settings. Licensing and education requirements vary from state to state.