This.
This is so horrifically true, it takes call after call after call (and emails, and faxes, and snail-mail claims forms that take "30 days" to "process") to get anything changed, and by then you have collections companies harassing you and your credit goes down the drain. Meanwhile you must keep working and taking care of family and dealing with the actual illness/issue that led to the medical visit in the first place. It is insane.