My question involves collection proceedings in the State of: Florida

My father was visiting from Italy where he resides. While here in Florida, he went to the emergency room and was treated for flu related symptoms.They took his italian drivers license information and gave him a bill, about $8.000!!! which he was not able to pay. He is back in Italy now and he received some bills from a recovery agency located in Switzerland on behalf of the hospital totaling about $10.000. What are the repercussions if he doesn't pay the bills? His only source of income is his pension and he only owns his home.
If he comes to the USA in the future, is there a possibility that he can get arrested for this outstanding bill? Or is there a possibility that they can put a lien on his house in Italy ?
Thank you