"Show me just what Mohammed brought that was new, and there you will find things only evil and inhuman, such as his command to spread by the sword the faith he preached." - Manuel II Palelologus
Not if it's up to them and they can get away with it. That is if they didn't get pre-authorization (dumbest thing I have ever heard of from insurance people who aren't anywhere close to being doctors).
Oh, and let's not forget all the paperwork for the government (Medicare/Medicaid) who can withhold payment for any reason until they decide to pay you! If they can't find a real reason they will make up one.