I'd guess that, from your experience in bio- related, you know all this stuff better than most -- but Doctors appear to derive most often from the easy-memorizing class of innate talents, and from fewer of the Right-brain folks who use words like 'healing' and not "8.37 % recovery ratio for 5.0 years". (Those with memorizing aptitude would do equally well in Accounting, but it pays so much less in $$ and in stature.)
(Whether or not there exist also Healers? amidst the flock, is a topic almost as incendiary as Lutheranism VS Cthulhuism - most places.)
Unfortunately for us all, 'anecdotal' doesn't count, as few of us can match a level of samples that beats 'suggestive'-only. I'd believe that you can beat any predisposition (with no more 'assurance' than above, natch) and we all know the Norman Cousins story.. getting a hotel room and two-reelers and Laughing Self right past a diagnosis and prognosis.
Meanwhile, second the suggestion above --
Cheers,
moi