While we are on this subject, does anyone know if you can wear boots into a hospital? I can't find my running shoes but I may have some sandals.
Most hospitals are private business which mean that they can make their own rules (to a certain extent). These are just rules. You can legally carry a firearm into a hospital but they can ask you to leave for many reasons including because you have a firearm. I usually CC into hospitals.
If there is no law that prohibits something, then it is legal.