firstly where are you finding these girls you are asking out? online? the street? work? bar/club? social club? ...it can make a big differance to your results.
secondly, are you waiting for some sign of signal before going in there and asking them out? doesn't sound like it if you are being rejected so much. contary to popular belief during successful relationship initiation it is actually the woman who picks the man in 65% of cases.
what I am saying here, is that usually when a man is actually successful it is because the woman has sent some kind of sign which he has picked up on. If you are just cold approaching women without no signs [which it looks like you're doing] then you have to expect a lot of rejection.
Also what is your race?
are you going for women outside your race?
If so [and you are not a white male] then expect a significant amount of dating discrimination based on your race. unfortunately dating is not equal oppertunities. Despite what people claim. Race matters A LOT
Also what looks level of women are you going for?
you may need to consider the fact that you are aiming too high and need to lower your standards. If you are as good looking as you claim, and going for girls of the same race, and going for girls around your level then i would expect you to be having a bit more success than you are currently.
also try to meet women in social circles or social groups rather than the street or clubs as their standards are a bit lower.
being a doctor is a good profession to have.
30 - 50 years ago, you would have been able to get dates with desireable women just off the back of that.
unfortunately things have changed and having a good job carries far less weight than it used to. Women these days are pretty liberated, feminism is rife, they earn a lot of money too these days so don't have to rely on men that much. As a result the majority of women your age are much more focused on LOOKS rather than him having a good job.
For anyone hoping that their good job [money earnt] will have a significant positive impact on their dating life, you really need to be earning like £150,000+ per annum ...and im totally serious, i've seen studies done on it.