There is a considerable difference between a doctorate and a medical degree...
A medical doctor (medic 3) has a medical degree, a doctorate is someone with a PhD or its equivalent.
To qualify as a medical doctor I require medic 3 and Edu 9.
0 - trainee, apprentice, needs supervision and training but knows the basics
1 - knows the basics+, no longer needs supervision, can qualify for job
2 - expert, can supervise others
3 - specialist in a field, can supervise and instruct
4 - paragon, the best you can get.