I call it the visiting arab price.
When I was on private insurance and D, my company paid between $3000 (Fresenius) and $5050(DaVita) for out of town dialysis at facilities they did not have a price negotiated contract with.
No, they "charged" them that. I guarantee that they didn't "pay" them that. It's all just a game of smoke-and-mirrors. Anything that appears in an insurance statement or a medical bill is about 95% fiction.
You would be wrong.
My insurance company sent statement (for all my claims) showing billed and paid amounts. Locally, there was a large spread. Out of town, paid was equal to the billed amount.
Ambulance costs ($5900 for a 17 mile hospital to hospital transfer) were also paid at asking price.