Introduction
If you’re enrolled in a Medicare Part D plan, you may have heard of the term “donut hole” or “coverage gap.” The donut hole is the gap in coverage between the initial coverage limit and the catastrophic coverage limit of your Part D plan. It’s important to understand how the donut hole works so you can plan for any potential increases in out-of-pocket costs for your medications.
Defining the Medicare Donut Hole
The Medicare donut hole is the coverage gap that exists in Medicare Part D plans. It begins when the total cost of your covered drugs reaches the initial coverage limit, which is set by the Centers for Medicare & Medicaid Services (CMS). For example, in 2021, the initial coverage limit is $4,130. After your total drug costs reach this amount, you enter the coverage gap, also known as the donut hole.
Once you reach the donut hole, your plan will no longer cover the full cost of your medications. Instead, you are responsible for a portion of the cost. This amount changes each year, but in 2021, you will be responsible for 25% of the cost of your brand-name drugs and 37% of the cost of your generic drugs while in the donut hole.
You remain in the donut hole until your out-of-pocket costs reach the catastrophic coverage limit, which is set at $6,550 in 2021. At this point, your plan will begin to cover most of the cost of your medications. According to CMS, “once you reach the catastrophic coverage phase, you’ll pay only a small coinsurance or copayment for covered drugs for the rest of the year.”

Explaining the Basics of the Medicare Donut Hole
It’s important to understand what qualifies as a donut hole expense. According to the Medicare Rights Center, “all expenses count towards the donut hole, including your deductible, copayments, coinsurance, and the cost of drugs purchased with discount cards.” This means that if you use a pharmacy discount card to purchase your medications, those costs still apply towards the donut hole.
It’s also important to understand how the donut hole works. When you reach the initial coverage limit, your plan will no longer cover any of the cost of your medications. You’re then responsible for the entire cost of your medications until your out-of-pocket costs reach the catastrophic coverage limit.
At this point, your plan will begin to cover most of the cost of your medications. The exact amount of coverage varies depending on the type of medication you’re taking. For example, in 2021, your plan will cover 95% of the cost of brand-name drugs and 80% of the cost of generic drugs.

How the Medicare Donut Hole Impacts Prescription Drug Costs
When you enter the donut hole, you may experience an increase in your out-of-pocket costs for medications. According to the Kaiser Family Foundation, “in 2020, the average out-of-pocket cost for Part D enrollees in the donut hole was $3,400.” These costs can vary depending on the type and quantity of medications you take.
To calculate your out-of-pocket costs, you need to know the total cost of your medications and the amount of coverage provided by your plan. For example, if your total medication costs are $4,000 and your plan covers 25% of the cost of brand-name drugs, your out-of-pocket costs would be $3,000 ($4,000 x 0.25 = $3,000).
Comparing Coverage Between Original Medicare and Medicare Advantage
There are two main types of Medicare plans: Original Medicare and Medicare Advantage. Both types of plans provide coverage for prescription drugs, but they differ in how they handle the donut hole.
Original Medicare has no annual limit on out-of-pocket costs. This means that your out-of-pocket costs can exceed the donut hole threshold of $6,550. In addition, Original Medicare does not offer additional discounts or savings programs to help offset the cost of the donut hole.
Medicare Advantage plans, on the other hand, have an annual limit on out-of-pocket costs. This means that once you reach the limit, your plan will cover all of the cost of your medications. In addition, some Medicare Advantage plans offer additional discounts or savings programs to help offset the cost of the donut hole.

Exploring Ways to Mitigate the Cost of the Donut Hole
While the donut hole can be a significant financial burden, there are ways to mitigate the cost. The first option is to use a Medicare Savings Program. These programs are funded by the federal government and provide assistance with the cost of Medicare premiums, deductibles, and copays.
In addition, many pharmaceutical companies offer patient assistance programs to help offset the cost of prescription medications. These programs can provide discounts or free medications to qualifying individuals. It’s important to check with your doctor and pharmacist to see if any programs are available to you.
Conclusion
The Medicare donut hole is a coverage gap in Part D prescription drug plans. During this gap, seniors can face higher out-of-pocket costs for medications. Understanding how the donut hole works and exploring ways to mitigate the cost can help reduce the financial burden of managing your prescriptions.
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