The AOA web site has info regarding various residency programs. Basically, any MD residency is open to you if you want it...surgery I have heard can be pretty tough to get as a DO though (may have to go DO residency for that one.) If you want to specialize, what field? Many specialties begin with internal medicine (cardiology, gastroenterology, nephrology, etc.)An IM residency should be relatively easy to secure in a DO or an MD program. Unless you thinking about something really competitive, if you want an MD residency, go for it. On a side note, my personal feeling on the subject is this: Go where you will get the most experience. If your choices are an MD residency in nowhere Alaska versus a DO residency at some county hospital in a big city...go DO. Bottom line, go where the interesting stuff is...that'a where you will learn the most. Whether it's DO or MD should be totally secondary. But remember, there are A LOT more MD residencies than just family practice open to DO's (in fact, all specialties accept DO's), so don't feel like you have to go DO just because you have strayed away from FP.