Yes, is you have a stand-alone drug plan or a Medicare Advantage plan, you want to check and make sure that all of your prescription drugs are covered, what the tier is for that drug and what your cost will be for 2013.
If you are on a Medicare Advantage plan, you also want to check your premium for that plan as well as any copays/coinsurances and if a benefit coverage has changed for 2013.
Stand-alone drug plans and Medicare Advantage HMO plans can change from year to year. Sometimes a little, sometimes a lot, sometimes to your benefit and sometimes not. Annual enrollment for these plans ends 12/7/2012,