When time comes for open enrollment for Part D, you need to find a new plan. I just started taking Eliquis and like you was shocked when I picked it up. $518 for a month. I have deductable of $505 so fulfilled that and called my insurance the next day to see what next month will cost me. I will have to pay $99 per month. Much better that $518. Will still see if I can find a better Part D when time comes. The pharmacist told me most people with insurance pay about $45 a month. Good luck getting the price down.