Sorry you are going through this... I have never heard of Medicare paying for ketamine... but you never know. I want to submit mine to my insurance, but I doubt it. The only insurance I have heard of that has paid has been Blue Cross.
So sorry you have a huge flare... It just seems like it never ends. I have ketamine infusions every 4 months or so much they wear off around 2 months for sure, and I am past two months. The next few months will be really rough. But I TOTALY recommend it. It takes the pain way way down for a long while after having quite a few of them (as long as you dont get hurt which I tend to do because I am 21 and still want to do things with my family and tend to overdo things, and tire myself out and get hurt then). Good luck with it! I hope Medicare pays for you! I definately would get them though, especially with a break, it will make a huge difference.