ED visits is #1. I can tell you that because I see the same homeless people in ED with bogus complaints multiple times a week when all they really want is a sandwich or a place to sleep for a couple hours. I don't blame them, they have to do what they can, but if someone says they've got chest pain, well you got yourself a 6 hr Ed visit. And there are also many many per shift with addiction problems who simply put either overdo it and end up in a ditch and brought in by ambulance or come in in withdrawal because they ran out of booze or drugs. It's sad because other than alleviating symptoms and giving them a sandwich, their situation doesn't change, and Medicare gets charged a few thousands for each visit because providers, facilities, tests , everything is carried out like a normal visit.