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Drug Coverage (Part D)

Each Medicare Prescription Drug Plan has its own list of covered drugs (called a formulary). Many Medicare drug plans place drugs into different "tiers" on their formularies. Drugs in each tier have a different cost.


A drug in a lower tier will generally cost you less than a drug in a higher tier. In some cases, if your drug is on a higher tier and your prescriber thinks you need that drug instead of a similar drug on a lower tier, you or your prescriber can ask your plan for an exception to get a lower copayment.


A Medicare drug plan can make some changes to its formulary during the year within guidelines set by Medicare. If the change involves a drug you’re currently taking, your plan must do one of these:

  • Provide written notice to you at least 60 days prior to the date the change becomes effective.
  • At the time you request a refill, provide written notice of the change and a 60-day supply of the drug under the same plan rules as before the change.


*source Medicare.gov