Medicare Part D is an optional prescription drug plan for anyone currently enrolled in Medicare. Before its introduction in 2006, many Americans spent thousands of dollars each year on prescription costs.
If you need help finding a prescription plan, our locally based NC health insurance brokers can help. We specialize in assisting people in North Carolina find the best prescription drug plan for their needs.
What does Part D Medicare cover?
Medicare Part D is insurance that helps pay for prescription drug costs. Plans are available through private insurance companies, and you must pay a monthly premium.
Most health insurance companies have a network of pharmacies that you can use to purchase your prescriptions. This means that instead of paying the total price of the medication, you'll only pay a percentage or a copay of the drug's cost. Your insurance covers the remaining cost.
How does Medicare Part D work?
If you're enrolled in Original Medicare, you can choose to enroll in a standalone Part D drug plan that works alongside your existing benefits. Alternatively, you can select a Part D drug plan as part of a Part C Medicare Advantage plan.
All Medicare Part D plans follow federal guidelines, and each insurance provider must share the details of their plan outline to the Centers for Medicare and Medicaid Services each year for approval.
What are the stages of Medicare Part D?
Thanks to changes from the Inflation Reduction Act, the Part D benefit structure was simplified starting in 2025. The coverage gap (also known as the "donut hole") has been eliminated, and there is now a $2,000 annual cap on out-of-pocket costs for covered prescription drugs. Most plans have three stages:
Your annual deductible
The maximum allowable Medicare Part D deductible for 2025 is $590 (up from $545 in 2024). Different providers may charge the entire deductible, a partial deductible, or waive it entirely, depending on your plan. Once you satisfy the deductible, you enter the initial coverage stage.
Your initial coverage
During this stage, you'll pay 25% coinsurance for your prescriptions (or copays, depending on the plan and drug tier). This continues until your total out-of-pocket costs (including deductible, copays, and coinsurance) reach $2,000. At that point, you enter catastrophic coverage.
Catastrophic coverage
Once you reach the $2,000 out-of-pocket cap, you pay nothing for covered Part D drugs for the rest of the calendar year. This stage provides significant protection for those needing expensive medications.
How Medicare tracks your spending
Medicare tracks your out-of-pocket costs annually (known as TrOOP) to help protect you from paying for services twice. For example, if you've already satisfied the deductible on one plan and then switch to a new plan mid-year (e.g., due to moving), Medicare can recognize your prior payments so you won't incur additional costs.
Part D drug plans can also change from year to year. Your plan's benefits, formulary, pharmacy network, premium, and/or copayments/coinsurance may change on January 1st each year. Medicare provides an Annual Election Period from October 15 through December 7th every year, during which you can change your plan if needed.
What do utilization rules mean
Medicare allows insurers to apply specific rules to help contain costs and ensure safety. Some utilization rules you may encounter include:
Quantity Limits
: Restricts how much medication can be purchased at once (or with each refill). If your physician prescribes over the limit, they may need to file an exception form.
Prior Authorization
: You or your physician needs plan approval before a pharmacy dispenses your medication. This often requires proof that the prescription is medically necessary.
Step Therapy
: Your insurer may require you to try lower-cost alternatives first before covering a more expensive prescribed medication.
These restrictions can affect any Part D plan and are particularly common for pain medications, opioids, or narcotics. If you require large amounts of pain medication, you may face extra paperwork regardless of your plan type.
Some medications aren't covered under Part D. If you need a specific drug not on the plan's formulary, you'll need to file an exception to get approval. Not all exceptions are granted, so you may have to pay out of pocket for non-covered medications.
To understand how these rules and restrictions affect your plan, we recommend speaking to an experienced health insurance agent who can explain how they impact your prescription costs. It's also a good idea to check your plan's formulary to see if any conditions apply to the medications you need.
How much does Medicare Part D cost?
When you enroll in a Medicare Part D plan, you'll pay a monthly premium to your insurer. This applies to everyone unless you qualify for Medicare's low-income subsidy (Extra Help).
The cost of a Medicare Part D plan can vary by location and coverage details. Average premiums have decreased in recent years, but you can expect to pay at least $15 per month (though many plans are higher). Some plans may have no deductible or lower premiums.
Eligibility for Medicare Part D
If you're currently enrolled in either Medicare Part A or Medicare Part B, you are eligible to enroll in Medicare Part D. When searching for the right plan for your prescription needs, be sure to check that the plan is available in your area. If you need help, talk to a North Carolina-based health insurance agent at Health Plans of NC.
Is Medicare Part D necessary?
Whether you need a Medicare Part D plan depends on your circumstances and how often you use or expect to use prescription drugs. Many medications cost hundreds or even thousands of dollars each year, making them difficult to afford without coverage. More importantly, if you don’t enroll in a Medicare Part D plan when you first become eligible, you may face a lifetime late enrollment penalty if you decide to enroll later. The penalty is calculated as 1% of the national base beneficiary premium ($36.78 in 2025) for each full month you were eligible but went without coverage.
If you have any questions about Medicare Parts A, B, C, or D, or any other health insurance plan, talking to a health insurance broker in NC can help. We'll work with you to understand your prescription needs and find the best plan. So get in touch with us today.
