Not sure how much specific information you will get in regards to hospitals that are used as DMU seems to keep that info locked up away from the DMU site, but the obvious ones are Iowa Methodist and Mercy here in Des Moines. Then there are a lot throughout the state of Iowa. Other sites include Ohio, Michigan, Illinois, Utah, Florida, Texas. There are others that I can't think of and rotations change some from year to year.
I'm just naming the ones I can remember off the top of my head. Currently a first year so clinical rotation knowledge is limited but it has been grazed during orientation and what not.