I carry my medical history in my head, where it's difficult to steal.
The level of undocumented and unajudicated malpractice is more than enough to convince me that all doctors should be assumed to be incompetant until proven otherwise, just like all other "professionals" with letters after their names.
Medical histories are the tool they're taught to use, just like practice guidelines. The patient comes in with this problem, you give him/her a prescription for that pharmaceutical, especially if the patient comes in demanding that pharmaceutical because they saw the ad on television and self-diagnosed themselves.
Since almost all the medschools are regulated by the AMA, which is regulated by the pharmaceutical companies, doctors receive almost zero education in nutrition. There are some, however, that didn't stop at the "education" which was handed them, like Russell Blaylock.