I'm not that kind of doctor, but I worked in healthcare for some time, and I do recall more references to "physicians" than "doctors", even when discussing a larger group that included surgeons. And I'm not sure a surgeon (knowing why FAs page for medical help) hearing that page is going to say, oh, well then they must need an internist. I will stay here and watch the end of PBMC. If FA was concerned that would be the case, they could ask for a "physician or surgeon" then. But I don't think the FA is qualified to determine you're going to need coat hanger surgery, and I would think a dermatologist is better than a PhD of Chinese literature, which is the point of discussing requests for a "doctor". My 2c.