Part D in one sentence

Part D is the prescription drug side of Medicare. Original Medicare on its own does not cover most of the medications you pick up at a pharmacy counter, so drug coverage is a separate thing you add — and it is one of the few parts of Medicare where the right answer changes depending on the exact list of medications you take.

There is no single Part D plan. There are many, each with its own covered drug list, its own pharmacy network and its own pricing, and the set you can choose from is determined by the county you live in. For South Carolina residents in York County, that last point is the one that saves or costs the most money, so we come back to it below.

Two ways to get it

  • A stand-alone Part D plan. This is what you add if you are staying with Original Medicare, and it is what most people pair with a Medicare Supplement (Medigap) policy, since Medigap does not include drug coverage.
  • Drug coverage built into a Medicare Advantage plan. Many Medicare Advantage plans include it, which is why people on that path usually do not buy a separate drug plan.

You generally do not run both at once. Picking one path or the other is part of the bigger decision about how you want your Medicare put together.

How the money works

Federal rules set the outer edges, and plans design themselves inside them. The figures that are fixed:

  • The deductible. A Part D plan's deductible can be no more than $615 in 2026, rising to $700 in 2027. Plans may set theirs lower, and some set it at nothing at all.
  • The out-of-pocket cap. This is the big one. Your own spending on covered drugs is capped at $2,100 in 2026 and $2,400 in 2027. Once you hit it, you pay nothing more for covered drugs for the rest of that plan year.

That cap is worth sitting with for a moment, because it changes the arithmetic for anyone on an expensive medication. It is a ceiling on the worst case, not a promise about the average case.

Inside those limits, plans differ in the ways that actually decide your bill: which drugs are on the list at all, which tier each one sits on, whether a drug needs approval before the plan will cover it, and which pharmacies get the better pricing. Two plans with similar premiums can produce very different yearly costs for the same person.

Pharmacies, networks and the Charlotte commute

Part D plans sort pharmacies into tiers of their own. The same prescription can cost one amount at a plan's preferred pharmacy and more at a pharmacy that is merely in the network, and more again outside it.

In York County that question is not abstract. If you live in Fort Mill or Indian Land and you have spent years filling prescriptions at a pharmacy near your office in Charlotte, or at one on the drive home, it is worth checking whether that specific location is preferred under the plan you are considering — and whether the one near your house in Tega Cay or Rock Hill is too. Chains do not always carry the same status at every location, and a state line does not make the question simpler.

Mail order is part of this conversation as well, particularly for maintenance medications. It is often cheaper and sometimes not, and it is plan-specific.

Which plans you can actually choose

Medicare Advantage and Part D availability varies by county and ZIP code. A South Carolina address in York County does not see the same list as an address a few miles up the road in Mecklenburg County. This is the most common source of frustration we hear from people here: a neighbor, a sibling or a co-worker across the line is very happy with their drug plan, recommends it warmly, and it turns out not to be on offer at all where you live.

It is not a defect in the system, and it is not something an agent can argue around. It is simply why a South Carolina address needs South Carolina shopping. Our Medicare guide for Rock Hill covers what that looks like on the ground.

Going without: creditable prescription drug coverage

Medicare expects you to take drug coverage when you first can. If you do not, and what you had instead did not count as creditable prescription drug coverage, a gap of 63 days or more after you are first eligible triggers a penalty. It adds roughly 1% of the national base beneficiary premium — $38.99 in 2026 — for each full month you went without, it lands on your Part D premium when you eventually enroll, and it generally stays for as long as you have Part D.

The most common version of this mistake is reasonable on its face: someone takes no medications at 65, sees no point in paying for a drug plan, and skips it. The penalty counts uncovered months, not months without medication. Five quiet years and a first prescription at 70 is a familiar story. The full picture is on the Medicare late enrollment penalty, and if you are still working and covered, the related question of whether your job's plan counts is covered on Medicare and employer coverage.

If your income is higher

Part D premiums are adjusted upward for higher incomes. The adjustment starts above $109,000 in modified adjusted gross income for one person and $218,000 for a couple filing jointly. In the first bracket it adds $14.50 to the Part D side each month, alongside $81.20 on the Part B side. That is based on a tax return from a couple of years back, which surprises people who have recently retired — if your income has dropped since then, that is worth raising, because the adjustment can be reviewed after certain life events.

If drug costs are hard to carry

There is a federal program called Extra Help that assists with Part D costs. For one person in 2026 it uses figures of $23,940 in income and $18,090 in resources. Medicare Savings Programs, which help with other Medicare costs, use monthly income limits for one person of $1,330 (QMB), $1,596 (SLMB) and $1,796 (QI), with a resource limit of $9,950.

Those are published thresholds, not a ruling on your situation. We do not tell people they are in or out over the phone — eligibility is checked. And to be clear about where our work ends: The Jordan Insurance Agency helps with Medicare. We do not sell or advise on Medicaid, and when a question belongs to South Carolina's Medicaid agency we will tell you so rather than improvise.

Why this gets reviewed every year

Drug plans change every year — covered drug lists are revised, tiers move, pharmacy arrangements change, and your own prescriptions change too. A plan that was the right fit two years ago can quietly become the wrong one without you doing anything. The Annual Enrollment Period, October 15 to December 7, exists for precisely this reason, with changes taking effect January 1; skipping that check is how people end up paying far more than they need to for the same medication. When you can enroll and change sets out the windows.

How The Jordan Insurance Agency helps

The Jordan Insurance Agency serves South Carolina clients from our Charlotte office at 3540 Toringdon Way, Suite 200, Charlotte, NC 28277, (704) 926-7565, Monday through Friday, 9:00 AM to 5:00 PM ET. The office is across the state line, and most people here do this by phone or video.

On Part D the work is concrete. You give us your actual medication list, including doses, and the pharmacies you actually use — on both sides of the line if that is how your week runs. We run those against the plans genuinely available at your South Carolina address and show you the projected yearly cost, not just the premium. Then we do it again next year, because the plans will have changed. A consultation with a licensed agent is free.