Annual Deductible
The 2017 annual Part D deductible is $400. For some plans, that means that before your plan kicks in for any expenses, you may have to pay the first $400 out of pocket.
Initial Coverage
During initial coverage, your plan will split the cost of Rx drugs until you have paid a total of $3,700 out of pocket, either through copays or coinsurance.
Coverage Gap
This is the “Donut Hole”. In the coverage gap, you will be responsible for paying between 40-51% of the cost of your Rx drugs, and this lasts until you hit $4,950.
Catastrophic Coverage
Any Rx drug costs above and beyond $4,190 will cost the greater of 5%, or $3.30 for generics/ $8.25 for brand name. Only a small number of people ever reach this stage.