How long can it take for a licensed practical nurse to become a medical doctor?

It would be the same thing in the sense that you need to have your bachelors degree already (which you probably do as an RN, BSN and definitely do as an NP) and then you need 4 years of medical school and 3 years of residency.

Because Nursing doesnt really include med school requirements you would have years of education to pursue if you choose any of these routes. LPN is one year not including pre med requirements RN is 2 to 5 years and includes very few pre med requirements and Nurse practitioner is 7(maybe 8) years. You still have to go for 4 years of medical school plus residency etc. And to get into med school you need a bachelors (sometimes only 3 yrs) which is four years and include your pre med school requirements. Your best bet would be to get a BSN (RN) and take pre med requirements. That way you could have your RN and still qualify for med school. So Thats 4+4+3 to 5 years or more for your RN and MD. So the answer would be shorter to get your RN

A medical doctor has 4 years of college, 4 years of medical school , 2 years of intern and 2 years of training in his specialty or a total of 12 plus years. I understand that very little of the credits earned by the Registered nurse count. That leaves a minimum of 8 years after regular college.