Unless you are enrolled in a Medicare Advantage Drug Plan (MA-PD) or a Medicare Cost Plan that includes Medicare prescription drug coverage, you will most likely pay a premium for your drug coverage charge. This drug coverage premium is in addition to your Part B premium
Individuals with high incomes might have to pay more for Part D coverage. If you are a single filer and your income is above $85,000 you might have to pay more than those individuals earning less than $85,000. For married filing jointly, this amount is $170,000. If you receive social security benefits, this amount can be deducted from your Social Security check. If you are a recipient of Railroad Retirement Board (RRB) benefits, the extra amount can be subtracted from your RRB check. If you prefer to be billed by Medicare or the RRB instead, the extra amount must be paid to Medicare or the RRB and not to your plan. Failure to pay the extra amount can result in your being dropped from your Part D coverage. If this happens, you may have to wait to join another and you may have to pay a late enrollment penalty for as long as you have Part D.
Most prescription drug plans have deductibles as well as co-payments or coinsurance. The annual deductible amount must be paid before your drug plan begins to pay its share of your covered drugs. Once your deductible has been met, your drug plan pays its share of covered drugs, and you pay yours if there is one. This is called co-payment or coinsurance. Some drug plans do not have deductibles.