I also can understand, in theory, why someone would do a combined program. However, practically it doesn't make a lot of sense (see above). Additionally, it seems that in order to be a good EM doc you must be acting as a poor IM doc, and vice versa. A large part of your EM training is learning how to discriminate b/t life threatening and correctable vs non-acute or non-lifethreatening and / or incorrectable. This is a vital skill for an EM physician, because we are all about keeping pts flowing through the ED so nobody dies of ischemic bowel in the waiting room (and so everybody makes money). However, in IM, their philosophy is to get to the bottom of everything. Your chromium is low- lets run IV chromium and do 24 hr chromium studies to calculate the fractional excretion, and maybe we should do a bowel study to look at absorption in the gut. This is an amazing difference in approach b/t the two areas, and I think it would be hard to come out of a combined residency practicing one day as an efficient EM doc and the next day as a incredibly detail oriented IM doc. It could probably be done, but I think it would make my head hurt trying to constantly ignore my urge to move the pt faster.