Yoooou would be surprised. I don't think there's actually any kind of "certification" on that planet at all. I'm pretty sure you can just hang up a sign and call yourself a doctor and you'd have as much experience as anyone in general from that place.

[ And that's not just his casually assholish streak coming out either. The one prominent doctor on that planet? Is not actual a real doctor and doesn't have a medical license. ]