depends on the speciality of the MD/DO- the overworked out of shape internist has no shot- the plastics guy that makes the big bucks and has time to go to the gym- well, he would (via his ego) disregard anyone with a DC after thier name and probably continue to destroy said chiropractor and then add insult to injury by throwing them their card and ending with "we're on facebook, bitch".
if the guy took enough time to pay attention to the fight and not cut and paste his face into the app. that allows you to see how you look with different cosmetic prodecures.