[mrobot]

medicare.gov has an estimator in its plan comparisons. You put in your prescription drugs and it tells you how much it will cost for the year for different part D (drug coverage) or part C (medicare advantage + prescription drug coverage) plans.

Do no use it. It's always wrong. It can completely mess up your whole year. I once picked the cheapest advantage plan based on that and it was completely incorrect, i ended up paying outrageous prices.

You have to actually look up what each plan says in its terms (what tier is my drug and how much do i pay for that tier) and calculate a cost for the year. You can find negotiated prices for the pharmacy / company pairing at q1medicare.com. Or you can call the sales department of the different advantage or part D plans.