If you want to be harassed about billing, go to southern hills. They use Fremont Emergency Services to process their billing. They never had the attending physician sign the paperwork, so my insurance rejected it. I've called 3 times now asking them to get the signature and send the bill to the insurance company and each time they tell me it's not their problem, for me to deal with my insurance to fix it. Each time there customer support has been nothing but rude to me. I'll drive across town before I ever go yo southern hills again.