I'm in the minority, most medical students just couldn't care less about business so you'll get a lot of responses telling you it's not worth it. To each his own, but I can't recall a physician I've mentioned this to saying anything other than they wish they had done something like this. Since you're one of the few interested in getting an MBA in addition to a MD/DO, go ahead and talk to physicians that have been in practice a while and see what they tell you. Then look into the schools that offer the dual degree and see how they're set up and if it's right for you.
Sure, it's possible to set up your own practice without an MBA, but you'll probably have an expensive learning curve. Also, the stuff you learn isn't just applicable to running a business but also how to manage your own finances/investments. Which, as someone with high income potential, will be especially useful.