According to the information provided by Yin Bukui, there are three divine doctors that he knows: They are; Doctor Hu Qingniu of the Ming Sect, Xue Muhua, the enemy of King Yan from the Xiaoyao Sect, and murdering famed doctor Ping Yizhi from Bianjing City.
Hu Qingniu, in addition to his pleasing title of "Butterfly Valley Medical Fairy", also has a not-so-nice nickname, "Seeing death without saving it."
This bastard really doesn't save anyone outside of the Ming Sect. Using threats or bribery won't work, so it's hard to imagine how difficult it would be to ask him to come to Wudang for an appointment.
The best talker among them is Xue Muhua, the enemy of King Yan from the Xiaoyao Sect.
His rules are simple and straightforward. Just give him a book of martial arts secrets and he can be engaged to save a life. He is not picky, as long as it's a martial art he hasn't collected, there are no limits on what kind of martial arts book he will accept.