If your insurance company is like mine - if a generic brand is available you must have the generic unless the dr writes DAW (despence as written) but you have to pay a higher cost for the name brand because a generic is available.

Celiac situation - brand name is verified gluten free but generic is not then no generic is available.

Insurance - file an appeal with your insurance company! Also contact your House Representatives and Senators in your state.

I am currently in the process and will let you know the outcome.