What is Medicare Part D Prescription Drug coverage?
Find out how Medicare Part D works, which drugs are covered and more to help you choose the right prescription drug plan for you.
What is Medicare Part D?
Not sure if a Medicare Part D plan is right for you? HealthSpring can help. First off, let’s explore what Medicare Part D is.
Medicare Part D prescription drug plans are part of the government’s Medicare program, like Original Medicare (Part A and Part B) and Medicare Advantage plans (Part C). Part D plans help lower the cost of your prescription drugs. You may also know Medicare Part D as the Medicare prescription drug benefit.
How do Medicare Part D plans work?
In general, a Medicare Part D plan has three stages that last for the entire plan year:
Deductible: In the first stage, you have to pay 100% of your plan’s annual deductible. A deductible is the set amount you need to pay before your health plan will start to help pay for your health care costs. In the case of Part D, these are the costs of your prescription drugs. The deductible is determined by your insurer.
Initial Coverage: Now that you have met the deductible, your Medicare Part D plan will begin to help cover some of your prescription costs. You will pay either a copay (a set dollar amount) or coinsurance (a set percentage of the total cost). The initial coverage stage lasts until you pay a total of $2,0001 in out-of-pocket prescription costs.
Catastrophic Coverage: In the last stage, your prescriptions costs are fully covered by your Medicare Part D plan. You pay nothing for the remainder of your plan year. Once the new plan year begins, you start the three stages over again.
Which drugs are covered by Medicare Part D?
Do you take prescription drugs to help manage a chronic condition, such as heart disease or high cholesterol? If so, Part D will help you pay for them and any prescription drugs you take to stay healthy. Part D plans will also help pay for the prescriptions you take for a short time, like antibiotics.
Did you know there are times when Medicare Part B will pay for your prescription drugs? Let’s discuss the differences between Medicare Part B and Part D.
How can you get Medicare Part D?
Part D plans are offered and managed through private insurers, like HealthSpring, as standalone plans. Medicare states that Part D plans must provide you with a minimum standard level of coverage. Otherwise, Part D plans can differ between insurers by level of coverage, drug list (also called formulary), pharmacy networks and monthly premium.
Are you entitled to Medicare Part A and/or enrolled in Part B? If so, there are two ways you can get Part D prescription drug coverage:
Enroll in a standalone Part D plan when you turn 65 or during the Annual Enrollment period
Enroll in a Medicare Advantage plan (Part C), which combines Part A, Part B and often includes drug coverage (Part D)
Medicare Part D At a Glance:
- Part D plans are part of the government’s Medicare program
- Enrollment is optional. Plans are offered by private insurers, like HealthSpring
- Helps lower your prescription drug costs
How do you choose a Medicare Part D plan?
Not sure how to choose the right Medicare Part D plan for you? Here are some factors to keep in mind:
First, it’s important to consider the medications you take. This will help you select a plan that covers your prescription drug needs for the entire health plan year.
Part D plans offer different levels of coverage for different tiers of drugs to help lower your prescription drug costs. And depending on your needs and current prescription drug coverage, you can choose a plan from a variety of different cost and benefit levels.
Are you married? If so, Medicare requires you and your spouse to pay separate premiums, deductibles, copays and coinsurance for prescription drug coverage.
What costs are involved in a Medicare Part D Prescription Drug Plan?
Your out-of-pocket costs for a Part D prescription drug plan may include:
Your Part D premium is a standard fee you may have to pay each month to your plan for providing you with coverage.2
As part of your Original Medicare coverage, you will have to continue to pay your Part B premium.
You and Medicare share the costs of your prescription drugs. Medicare will pay for a part of your prescription drugs through your health plan. And you are responsible for the remaining cost, either as a copay or coinsurance.
Enrolled in a Medicare Advantage Plan (Part C) that also includes drug coverage? Then your monthly premium will include both the medical and drug portion of your plan.
And, you may have to pay a late enrollment penalty (LEP) if you don’t enroll in a Part D plan during your Initial Enrollment Period. Medicare will charge you a fee each month you delay enrolling. The LEP fee will be added to your monthly premium.
Is financial help available to pay for Medicare Part D?
Yes, Medicare provides financial assistance if you have a limited income. This assistance is known as Extra Help. If you qualify, you will receive help paying your out-of-pocket prescription drug costs, like annual deductible (if applicable) and copays or coinsurance.
How to pay your Medicare Part D premium
You can pay your Medicare Part D Prescription Drug Plan premiums in four ways:
You can have the premium payment automatically deducted from your checking or savings account. Or you can use your credit or debit card to set up an automatic payment instead of a bank account.
You can have the premium payment automatically deducted from your Social Security check or benefit.
Contact your employer or former employer and ask if they will pay for your Medicare benefits. In this case, you may pay little to no premium.
Have your health insurer mail you a bill each month. You should be able to call the insurer's 1-800 number or visit their website using the payment information listed on the bill to make your payment.
1This dollar amount is set by Medicare and may change from year to year
2In general, most people will pay the standard Medicare Prescription Drug Plan (Part D) premium each month. For 2025, there are two instances where you will pay an extra amount:
- Individuals who file taxes either as single or married filing separately and have an annual income of $106,000 or above
- Couples who have an annual income of $212,000 or above
If this applies to you, the Social Security Administration will send you a letter stating the extra amount and how you can pay it. Your Medicare Part D plan insurer will not notify you. And the extra amount must be paid separately from your monthly Part D premium.