Medicare ยท Prescription Drug (Part D)
Medicare Part D prescription drug coverage, explained.
A clear, plain-language look at how Medicare Part D works in 2026, the late-enrollment penalty that follows people for life, and how to pick a plan around the drugs you actually take. Education first, no hard sell.
By calling this number you will be connected to a licensed insurance agent.
Video transcript
Medicare Part D is prescription drug coverage that helps pay for your medications. It works alongside Original Medicare and is often paired with a Medicare Supplement plan since Supplements don't include drug coverage.
If you take regular prescriptions, choosing the right Part D plan is especially important. But even if you aren't taking medications right now, it's still something to pay attention to. Going too long without creditable prescription coverage can lead to a late-enrollment penalty later on.
The biggest factor when comparing Part D plans is the formulary, which is the list of covered medications and how they're priced. Two plans can have very different costs for the same prescription, so the best place to start is with your medication list, not just the monthly premium.
Since formularies can change each year, reviewing your plan during the Annual Enrollment Period is always a good idea.
Apex Health Advisors LLC is not affiliated with or endorsed by the U.S. government or the federal Medicare program.
Part D is the part of Medicare that helps pay for your prescriptions. If you skip it when you first qualify and do not have other drug coverage, you can owe a penalty for as long as you have Medicare. Our team compares Part D plans on the drugs you actually take, so you are not overpaying or missing a drug you need.
At a glance
- What it covers
- Pharmacy prescriptions, which Parts A and B do not cover. You choose the plan and pay a separate premium.
- Who it fits
- People on Original Medicare or Medigap. Advantage plans usually build drug coverage in already.
- How the cost works
- A premium, a deductible up to $615 in 2026, then tier copays, with a hard $2,100 annual cap.
- Where to compare and enroll
- The Plan Finder at Medicare.gov, or 1-800-MEDICARE (1-800-633-4227), TTY 1-877-486-2048, 24 hours a day, 7 days a week.
What Part D actually is, and who needs it
Original Medicare does not cover most prescriptions. Part D is the separate piece that does.
Parts A and B do not cover most drugs you fill at a pharmacy. Part D is sold by private insurers. You choose it, and you pay a monthly premium on top of your Part B premium. If you have a Medicare Advantage plan instead, drug coverage is usually built in, so a standalone Part D plan is mostly for people on Original Medicare or a Medigap policy here in Arizona and Alabama.
Here is the trap our advisors have watched people walk into for years. Someone turns 65, takes nothing but a daily vitamin, and decides Part D is a waste of money. Three years later a diagnosis hits, they suddenly need a brand-name drug, and now they are paying for the plan plus a permanent penalty at the same time.
The late-enrollment penalty, with the real math
The penalty is small per month, but it never goes away, so it quietly adds up to thousands.
The penalty is 1% of the national base beneficiary premium for each full month you could have had Part D (or other creditable drug coverage) and didn't. In 2026 that base is $38.99. The penalty is calculated against the base, not your plan's premium, it rounds to the nearest dime, and it is added to your premium for as long as you have Part D. It also moves a little each year as the base premium changes.
Wait three years and that is 36 uncovered months, roughly $14 a month added to your premium, for life.
Creditable coverage and the 63-day clock
Good drug coverage you already have can keep you penalty-free, but you have to prove it.
You can skip Part D without a penalty if you already have drug coverage that is at least as good as standard Part D. That is called creditable coverage, and employer plans, retiree plans, TRICARE, VA benefits, and FEHB often qualify. The catch is that your insurer has to tell you each year whether your coverage is still creditable, usually in a notice before October 15. Keep those notices. You may need to prove it later.
One thing to watch heading into 2026: the way creditable status gets tested has changed, and some employer and retiree drug plans that counted in past years may not count now. So do not assume.
Why two plans with the same premium can cost wildly different amounts
Every plan decides which tier your drugs land on, so the cheapest premium is often the wrong pick.
Every Part D plan has a formulary, which is its list of covered drugs sorted into tiers. Most plans use five or six: preferred generics at the bottom (cheapest), then generics, preferred brands, non-preferred drugs, and specialty drugs at the top. Tier placement is set by each plan, not by Medicare. A medication that sits on Tier 2 in one plan can land on Tier 4 in another plan sold in the same ZIP code, and your copay follows the tier.
That is why the cheapest monthly premium is so often a bad deal. A $0-premium plan can cost you far more over a year if it parks your specific drugs on high tiers, puts your pharmacy out of its preferred network, or adds prior authorization or step therapy to something you take daily. You compare on estimated annual total cost, not the sticker premium.
What changed for 2026
The benefit was reworked, so a lot of older advice about the donut hole is now wrong.
The coverage gap, the old donut hole, was eliminated permanently in 2025. There is now a hard out-of-pocket cap of $2,100 for 2026: once your covered-drug spending hits it, the plan pays 100% for the rest of the year. The deductible can be no higher than $615, and many plans charge less.
- Spread the cost. If you face a big bill early in the year, the Medicare Prescription Payment Plan lets you spread your out-of-pocket spending across the remaining months of the plan year instead of paying it all at once.
- Lower prices on some common drugs. Federal price negotiation took effect January 1, 2026, on ten widely used drugs, including Eliquis, Jardiance, and Xarelto. If you take one of these, your cost may be lower than in past years depending on your plan.
- Extra Help is worth checking. The Low-Income Subsidy caps copays at $12.65 for brand drugs and $5.10 for generics for those who qualify. Eligibility is based on both income and resources, so the income figure alone does not tell the whole story, and many people who qualify never check.
How to actually compare plans
Do not eyeball this from a brochure. Compare on your drugs, at one official place.
Go to the Plan Finder at Medicare.gov, enter every drug you take by name and dosage, add your pharmacy, and let it show you the estimated annual total cost (premium plus deductible plus copays) for each plan side by side. That number is what matters, and it is the only honest way to see which plan is cheapest for you specifically.
Our team is happy to walk you through how the pieces fit with the rest of your Medicare coverage, so the plan you land on works alongside everything else in your household. This page is educational only and we do not name or recommend specific Part D plans here.
Educational information only. Apex Health Advisors is not connected with or endorsed by the U.S. government or the federal Medicare program. We do not offer or promote specific Medicare Advantage or Part D plans on this page. To compare and enroll in Part D plans, use the Plan Finder at Medicare.gov or call 1-800-MEDICARE (1-800-633-4227), TTY 1-877-486-2048, 24 hours a day, 7 days a week.
Common questions
Good questions, straight answers
Do I need Part D if I'm healthy and don't take any prescriptions?
You are not required to have it, but skipping it is a gamble that often backfires. The late-enrollment penalty accrues for every month you go without creditable coverage after you become eligible, and it never goes away once it starts. If a new diagnosis hits a few years from now, you end up paying for the plan and a permanent surcharge at the same time. For many healthy people, a low-cost plan now is cheaper than the penalty later.
How is the Part D late-enrollment penalty calculated in 2026?
It is 1% of the national base beneficiary premium, which is $38.99 in 2026, for every full month you went without Part D or other creditable drug coverage after becoming eligible. The result is rounded to the nearest ten cents and added to your monthly premium permanently. For example, 36 uncovered months means a 36% penalty, roughly $14 a month added for life. The amount adjusts slightly each year as the base premium changes.
Why shouldn't I just pick the plan with the lowest monthly premium?
Because the premium is only one piece of your cost. Each plan decides which tier your specific drugs land on, whether your pharmacy is in its preferred network, and whether a drug needs prior authorization. A $0-premium plan can cost you thousands more over a year if your medications sit on high tiers. Enter your actual drug list into the Medicare.gov Plan Finder and compare on estimated annual total cost, not the monthly premium.
Can Apex Health Advisors enroll me in a Part D plan?
This page is educational, and we are not connected with or endorsed by Medicare or the federal government, so we do not offer every plan in your area. The official place to compare every Part D plan against your exact drug list and enroll is the Plan Finder at Medicare.gov or 1-800-MEDICARE. Our licensed advisors in Arizona and Alabama are glad to help you understand how Part D fits with the rest of your Medicare coverage so the whole picture works together.
Apex Health Advisors LLC is not affiliated with or endorsed by the U.S. government or the federal Medicare program.
We do not offer every plan available in your area. Currently we represent 3 organizations which offer 16 products in your area. Please contact Medicare.gov or 1-800-MEDICARE to get information on all of your options. TTY users can call 1-877-486-2048. The line is open 24 hours a day, 7 days a week.
Have questions about Medicare?
We are happy to help you understand how all the pieces of Medicare fit together and whether we can help with your coverage. To enroll in or review Part D and Medicare Advantage plans available in your area, you can also visit Medicare.gov or call 1-800-MEDICARE (TTY 1-877-486-2048), 24 hours a day, 7 days a week.
By calling this number you will be connected to a licensed insurance agent.