As a kid I recall people being genuinely confused as to whether a DO was a "real" doctor. Not philosophically, mind you, but in terms of whether this person was able to do the sort of things a physician can do. I can look up a license. You can look up a license. Most people can look up a license. Most, however, won't. Beyond that, there's actually an oddly logistical reason to get the MD. There are only so many approved post-nominals in New York (I'm sure other states too). MBBS is not one of them. Many forms, after the provider name, require you to circle the appropriate post-nominal. Those options are MD/DO/FNP/PA-C. Now, there are of course variations to license classes. A nurse midwife (CNM) can do quite a bit and a Certified Nurse Anesthetist has their own abbreviation I'm too lazy to look up. But all of those relate to licenses, not degrees. There are quite a few Physician Assistants in New York who don't even have degrees because up until 2009 (ish) it was still possible to become a Physician Assistant through a certificate program in this state. So while PA-C implies a masters, or at least a bachelors, it isn't necessarily so. The only thing PA-C really means is that you got the license according to whatever requirement was in place at the time you were licensed. MD/DO is a weird one. It's the opposite. It's a degree that implies a license which is not always the case.