What Medicare Part D is

Medicare Part D is the prescription drug side of Medicare. It helps pay for the outpatient medicines you pick up at the pharmacy or take at home. This matters because Original Medicare — Part A (hospital) and Part B (medical) — does not cover most of the drugs you take on your own at home. Part D exists to fill that gap.

Part D is not run directly by the government. Instead, it is offered by private insurance companies that Medicare has approved. Each plan has to follow Medicare's rules, but the companies set their own drug lists, pricing, and pharmacy networks. That is a big reason two plans can charge very different amounts for the exact same medication.

The two ways to get Part D coverage

There are two common paths to prescription drug coverage, and here in Charlotte and across North Carolina you will see both:

  • A stand-alone Part D drug plan. This is a separate drug plan you add on top of Original Medicare. Many people who keep Original Medicare (often paired with a Medicare Supplement/Medigap policy) choose this route so their drugs are covered.
  • Built into a Medicare Advantage plan. Most Medicare Advantage (Part C) plans bundle prescription drug coverage right into the plan — these are called "MA-PD" plans. If you go this route, your drug coverage and your medical coverage come from the same plan.

One important note: you cannot mix a stand-alone Part D plan with a Medicare Advantage plan that already includes drug coverage. Choosing the right combination is very individual, which is exactly why it helps to have someone walk through your specific medications with you.

How a Part D plan is built: the formulary and drug tiers

The formulary (the plan's drug list)

Every Part D plan has a formulary — its official list of covered drugs. Plans are not required to cover every single medication, but Medicare does set floors: each plan must cover at least 2 drugs in most drug categories, and must cover substantially all drugs in certain "protected" classes. The practical takeaway is simple: before you pick a plan, you want to confirm your specific prescriptions are on that plan's formulary.

Drug tiers

Plans group the drugs they cover into cost "tiers," and your copay or coinsurance generally goes up as the tier goes up. A common structure looks like this: Tier 1 is preferred generics (lowest cost), Tier 2 is other generics, Tier 3 is preferred brand-name drugs, Tier 4 is non-preferred drugs, and Tier 5 is specialty drugs (highest cost). That tier structure is the typical model, but it is not a rule — the exact number of tiers, the tier names, which drugs land in which tier, and what you pay are all set by each individual plan and vary from one plan to the next. Always confirm the details against the specific plan's formulary rather than assuming.

Part D costs in 2026

Your Part D costs generally include a monthly plan premium (which varies by plan), and you may have a deductible and copays or coinsurance depending on the plan you choose. Because those pieces are set plan-by-plan, the smart move is to compare total yearly cost — premium plus what you'd actually pay for your drugs — not just the sticker premium.

There is one very meaningful protection worth knowing about. In 2026, Part D includes a $2,100 annual out-of-pocket cap. Once your out-of-pocket spending on covered drugs reaches that amount in the year, you move into what's called the catastrophic phase and pay $0 for your covered drugs for the rest of that calendar year. For anyone taking expensive medications, that yearly ceiling can make a real difference.

The late-enrollment penalty

Part D also carries a late-enrollment penalty if you go without creditable drug coverage after you're first eligible and later decide to sign up. The Part D late penalty is 1% of the national base beneficiary premium for each month you went without coverage, and it can stick with you. This is why it often makes sense to enroll in some form of Part D coverage when you first become eligible, even if you take few or no medications today — it protects you from the penalty later.

Help paying for Part D

If you have limited income and resources, a federal program called Extra Help (also known as the Low-Income Subsidy, or LIS) can greatly reduce your Part D premium, deductible, and copays. You're automatically enrolled in Extra Help if you have full Medicaid, Supplemental Security Income, or a Medicare Savings Program; others can apply through Social Security. The income and resource limits change yearly, so check Medicare.gov, ssa.gov, or call 1-800-MEDICARE for the current figures.

When you can enroll or change your Part D plan

Timing matters with Part D, and there are a few key windows:

  • Initial Enrollment Period. This is the 7-month window around your 65th birthday — the 3 months before your birthday month, your birthday month, and the 3 months after. This is when most people first sign up.
  • Annual Enrollment Period (AEP), October 15 through December 7. This is the main once-a-year window to join, switch, or drop a Part D plan. Changes take effect January 1. This is the window to use if your drugs or plan changed and you want a better fit for the coming year.

Your medications change over time, and plans can change their formularies, premiums, and tiers from one year to the next. That's why reviewing your drug plan every single year at renewal — not just setting it and forgetting it — is one of the most valuable habits you can build.

How The Jordan Insurance Agency helps

Choosing a Part D plan is really about matching your specific list of medications to the plan that covers them at the lowest total cost — and then re-checking that match every year, because both your prescriptions and the plans keep changing. The Jordan Insurance Agency is an independent, full-time, licensed and certified insurance agency based right here in Charlotte, North Carolina, serving families across the state. As an experienced independent agent, we represent multiple carriers, complete our annual AHIP and carrier certifications, carry E&O coverage, and use real enrollment technology to compare plans side by side against your actual drug list — including whether Extra Help might apply to you. Best of all, our guidance costs you nothing: the carrier pays the agent, and your premium is exactly the same whether you enroll on your own or with our help. And because we review your plan every year at renewal, we're watching for the formulary and pricing changes that could otherwise catch you off guard. If you're approaching 65 or helping a parent sort out prescription coverage, we're glad to walk through it with you in plain English.

Plan availability & disclaimer

We do not offer every plan available in your area. Any information we provide is limited to those plans we do offer in your area. Please contact Medicare.gov or 1-800-MEDICARE to get information on all of your options. The Jordan Insurance Agency is not connected with or endorsed by the United States government or the federal Medicare program.