As far as I know doctors can add themselves to the directory without any form of verification.
In a place like Cambodia where many "doctors" have no medical education at all, health services are under no governmental control, and expats are widely seen as cash cows, this can be quite dangerous, if not life-threatening.
I'm not saying anything has happened, but looking at the current list of health related entries, I'm very suspicious. Many of them look quite dodgy.