This would only work if there were a mechanism to pay for diagnosis. Internal medicine specialists are supposed to be "diagnosticians," as you envision it -- t

This would only work if there were a mechanism to pay for diagnosis. Internal medicine specialists are supposed to be "diagnosticians," as you envision it -- they have more training than general practitioners if they're internal medicine specialists. But they're one of the lower-paid specialties, in part because it's easy to charge for a stent or injection but in the US the act of diagnosing a problem doesn't really have a code.