What are the Chicago suburban admitting procedures?

Hello, again, all!

I'm researching admitting Mom (who is home-bound, not in a hospital or other facility) to a suburban Chicago hospital -- options including Rush University, Northwestern University, and University of Chicago.

I wondered if any of y'all knew the admitting procedures for any of these hospitals.

We had to eliminate Mayo Clinic because they won't accept a patient transfer from home -- only from another hospital.

Is that the case with these local hospitals? I was also hoping not to have to take her through the Emergency Room in order to admit, but I don't know if that's an option.

Any help would be appreciated!
Ann