
The city-states don't really have a standing bureaucracy like the modern day, so stuff like 'taking a test to become a recognized doctor' would be anachronistic. I think you would just be a member of the Conjurers' Guild (Stillglade Fane), the Alchemists' Guild (Frondale's Phrontistery), or the Arcanists' Guild (Melvaan's Gate). If you are neither of these and a physical medic, I believe the term is 'chirurgeon'.