Link to DO/MBA programs
Those are only current programs. There are some programs in the talks for MBA. I know VCOM is working with linking with VT (VCOM's going to have some GREAT programs I tell ya!), UMDNJ was supposed to have an MBA program with Rutgers-Camden, while I think you might be able to swing the MBA program there, they've had problems with "dual degree" candidate in the past (from UMDNJ-RWJ) with that program. They aren't very flexible in some regards. Maybe they've gotten better in the past 2 years though.
Other than that, you do NOT need work experience. Your schooling counts in these programs. Please beware of WHAT TYPE OF PROGRAM you're getting yourself into though. I've said this time and time again. Visit the Joint Degree forum (MD/DO MBA) as many people have asked questions similar to those in this thread. Not all programs are created equal. If you really want an MBA look for dual degree program or just wait until residency/attending. Some of these "MBA" programs are mearly glorified Masters in Health Administration in my opinion which is fine if you are looking for that type of degree.