I highly recommend finding out about their appeal procedures. If you have your insurance through an employer, you can also ask the insurance broker how to appeal. One time, an insurance broker went to bat for me with the insurance company and got something approved that had previously been denied. You might also call a few compounding pharmacies in your area to get a quote for the medication and see what it would cost out-of-pocket. If you find it does help, that may be useful in writing an appeal.

https://origin.bankrate.com/brm/news.../20020619a.asp

I hate that dealing with crap from insurance companies comes at times when I least feel like dealing with it.