yes and no....it has nothing to do w/ your residency...only your 1 year internship requirement. If you're doing a specialty like PM&R, Anesthesiology, etc, that requires a 1 year internship for both MD's and DO's..you can just do a DO internship and go on to an MD residency if you'd like. If you are doing an MD primary care residency that counts the first of 3 years as your "internship" year....then you can try to go through resolution 42. If certain requirements are met in your MD internship year, that res 42 allows you to apply (and 90% of the time) obtain DO approval of your MD internship. There are lots of little ins and outs that are specialty specific...but overall what I wrote above is how DO's who do MD residencies practice in those 5 states. Hope that helps