Well, my insurance company changed our preferred provider to a different hospital. My CF doctor, however, wouldn't treat me at the other hospital. Being that my lung function was down from (May) 80% to (Oct) 36%, I felt it was crucial to be treated by my doctor whoknows me and my history andis listed asthe only CF clinic in AK on the CFF, then to be treatedby any old pulmonologist. My insurance company disagreed. They are billing me for close to $50,000 for making the choice to be treated by a non-preferred hospital. Normally, they would pay 80%, but this time they only paid 60% and apparently, still billed me when I went over the yearly max I was supposed to pay. I want to appeal it, but I'm not sure what to write to convince my insurance company that they should pay the normal 80%. Has anyone had a similar situation or have some advice for me? Thanks in advance.