The problem is that its state law that prohibits the concealed carry, not the medical center.  The no weapons policy has been in effect for decades, the signs didn't go up to "disarm employees", I have provided ample documentation to show this, they went up to mitigate lawsuits.  There is no obligation for any company to lose money in order to maintain the safety of an event that has never happened.  

 Nobody has ever needed to use lethal force in the medical center, no patient has ever been killed by a firearm in self defense, but lawsuits due to employees having weapons happen regularly.  Also patients change facilities, more cost, more profit loss.

 Cost measures must be reasonable, for instance installing and staffing a metal detector at every public entrance would cost millions and while that may increase safety it is not a reasonable expectation that a company lose millions, potentially costing jobs in the process in order to prevent a crime that has no precedence.