How do I get started on registering my pet to make hospital visits?

I want to get started in taking my ferrets to the hospitals to visit patients and help cheer up a few people. Also being that many people around here haven't seen a ferret in person. My 6 year old male is up to date on his shots, very calm tempered, and very sociable. I just dont know how to go about getting started. Is there a website I can register him at? Do I just talk straight to the hospital director? Can anyone point me in the right direction? I would really like to be able to visit childrens wards and such.