I considered that but find it unlikely (though not impossible) that they would construct a complex of buildings taking up a good part of a city block, and then blow it up. Fantastically expensive, even for a high-budget movie...plus you only get one shot at getting it right.
If memory serves, the "hospital" was actually an old multi-storey car park that was due for demolition. Add some window and fake walkways, and there you go a hospital.
One or two of the Chicago MR members saw or at least heard it...
Edit: It wasn't a car park, it was a "four-story building on the former Brach Candy factory site"