I agree with this, I've worked in health care and programmers have nothing on physicians when it comes to arrogance. I don't know any programmers who would coach a physician on the proper way to design a course of treatment...
The only way to tell the difference is to watch their results for a while.
Jacquesm mentions the "save my life" thread. Yeah. Read that. I'm one of the programmers would damn straight coach a physician on the proper way to design a course of treatment - until I know which of the above groups the physician in question falls into.