How hard is it to get approved for epclusa on social security disability part D?

I'm starting to worry I hear people have so much trouble getting approved but I was told it's very easy now by my gastroenterologist. I am waiting for my part D to go into effect January 2nd and they say it should be no problem since I have a part D they say that's the easiest way to get medicine. I pray I don't have to wait long I've been having a lot of increased symptoms that are not good and they aren't even talked about. Thank you for this community- Cat