Part D Prescription Drug Plans

For 2026 the standard Part D deductible is $615 — the amount you pay out of pocket before the plan starts sharing your covered drug costs. Some plans lower that deductible to around $300–$350, and a few waive it on certain tiers (verify current figures on Medicare.gov). The deductible is only one piece, though; a plan with a low deductible but a bad formulary fit can still cost you more. We compare your total annual cost across the plans we offer.

If you go without creditable drug coverage after you're first eligible for Part D, Medicare adds a permanent penalty to your premium — roughly 1% of the national base premium for each month you went without. It lasts as long as you have Part D. You avoid it by enrolling on time or keeping creditable coverage from an employer or another source. We check your dates so you stay penalty-free.

Yes. During the Annual Enrollment Period from October 15 to December 7, you can switch your standalone Part D plan for the next year, with changes taking effect January 1. Because plans adjust their formularies, deductibles, and pricing yearly, the plan that was cheapest this year may not be next year. We review your prescriptions against the plans we offer every fall so you're always on the lowest-cost option for your drugs.

Part D premiums vary by plan, and for 2026 you may also have a deductible up to $615 plus copays based on your drug tiers. The most important 2026 number is the annual out-of-pocket cap of about $2,100 on covered drugs — after that, covered medications cost you $0 for the rest of the year (verify current figures on Medicare.gov). We estimate your total annual cost across the plans we offer rather than just the premium.

Often yes, to protect yourself from the lifelong late-enrollment penalty. If you skip Part D when first eligible and later need coverage, the penalty is added to your premium permanently. A low-cost Part D plan now is usually cheaper than the penalty you'd owe later, and it means you're covered the moment you're prescribed something. We can find a low-premium plan that keeps you penalty-free.

The Part D coverage gap known as the 'donut hole' has effectively been eliminated. In its place, 2026 Part D uses a single annual out-of-pocket cap of roughly $2,100 on covered drugs. Once you reach that cap, you pay nothing more for covered medications that year (verify the current cap on Medicare.gov). This is one of the most meaningful recent Medicare changes, especially for people on costly prescriptions who used to face open-ended bills in the gap.

It depends on your overall path. If you choose Original Medicare or pair it with a Medigap plan, you add a standalone Part D plan — the route about 113,372 South Dakotans take (CMS PY2026; verify on Medicare.gov). If you choose a Medicare Advantage plan, drug coverage is usually built in, so a separate Part D plan is generally not needed. We look at your whole coverage picture and the drugs you take before recommending which way fits.

Possibly. A federal program called Extra Help, also known as the Low-Income Subsidy, lowers Part D premiums, deductibles, and copays for people with limited income and resources. Many who'd qualify never apply simply because they don't know it exists. Qualifying for Extra Help can dramatically cut what you pay for medications. We can point you to how to check your eligibility and factor it into the plan comparison.

Yes, often quite a bit. Many Part D plans have preferred pharmacies where your copays are lower than at a standard in-network pharmacy, and mail order can be cheaper for maintenance medications. Which Sioux Falls-area pharmacy you prefer can shift your total annual cost meaningfully. We factor your preferred pharmacy into the comparison so the plan we recommend is the lowest cost where you actually fill your prescriptions.

Most people can first enroll in Part D during their Initial Enrollment Period — the 7 months around their 65th birthday — or when they first get Medicare. After that, the Annual Enrollment Period from October 15 to December 7 lets you join, drop, or switch a plan for the next year. Certain life events open a Special Enrollment Period. Enrolling on time matters because waiting can trigger the lifelong late penalty. We track your dates so you don't miss a window.