If you finished medical graduation in a foreign country and you do not have all the necessary documents to apply for a permanent licence (Good Standing Certificate or Registration Certificate), you should apply to Landesprüfungsamt, Düsseldorf for recognition of your degrees.
Landesprüfungsamt will compare your degrees with the German curriculum and provide you with a report of where your studies stand. Depending upon the decision from Landesprüfungsamt, you can proceed further.
If you have a significant shortage in your studies; for example semesters of study, you need to join a German university for completion of your studies/Internship.
Or you may be asked to take the Kenntnisprüfung/Eignungsprüfung directly.