It is a long process
If you want to email me I will point you in the right direction.
I appreciate the fact that you are requesting this information since I thoroughly detest those that are practicing medicine without a license, and there are quite a few of them. I do take time and effort to locate them and denounce them before the authorities.
There is lots of paperwork top be done.
If you are serious, start by having your entire CV, Med School degrees and course work translated by a legal translator and certified by a Dominican Consulate near you.
Later,
Papa HB