Good advice, and often difficult to determine. Sometimes the hospital won't know who the support team is until the day of surgery. We got a 'surprise' bill after a surgery for I don't even know what. I finally just sent them a check for half of what they were charging with a note that negotiating the check would indicate acceptance of our settlement offer. They cashed the check and that's the last I heard from whoever they were. Still not sure if it was a scam or a legitimate charge.