I agree that having the undergrads and hospital sharing the same campus is idyllic and the Gothic architecture is to die for, yet I don't want to burst your bubble, ckent:
Once you stray from the immediate Hyde Park area (I'd say between 54th and 60th streets and Cottage Grove Rd on the west), you are in South Side ghetto. However, a friend of mine was carjacked on campus, so even Hyde Park itself is not impermeable to crime.
The only Chicago medical campus that would be truly safe would be Northwestern since it's right off Michigan Avenue. The UIC/Rush/Cook County area is not the best, either, but if you're used to living in an urban area, you know how to avoid certain places. Loyola is in Maywood, which is not that safe, either. Most people who go to Loyola live in nearby suburbs that are safer (Westchester, Oak Park, Brookfield).
-S.