Check This Letter Before Your Medicare Part D Premium Goes Up in 2027

A letter from your drug plan is probably sitting in your mailbox right now. Most people toss it or file it away. This year, that is a mistake. If you have a stand-alone drug plan, your Medicare Part D premium going up in 2027 is very likely. A federal subsidy that kept these premiums low for two years is ending. And the letter that tells you exactly how much you will pay has to reach you by September 30.

You get one short window to act on it. Open enrollment runs from October 15 to December 7. After that, most people are locked in for all of 2027.

The letter most people never open

Every Medicare drug plan must send its members an Annual Notice of Change each fall. It lists what changes on January 1. That includes the premium, the deductible, which drugs are covered, and which pharmacies cost less.

Here is the old problem. Drug plans renew on their own. If you do nothing, you stay in the same plan next year, even if it got more expensive. Many Americans on Medicare have kept the same plan for years without comparing. That habit was cheap when prices barely moved. It will not be cheap in 2027.

Why your Medicare Part D premium is going up in 2027

In 2025 and 2026, Medicare ran a program to keep stand-alone drug plan premiums steady. It was called the Part D Premium Stabilization Demonstration. It paid plans extra so they could charge members less.

That program is over. CMS confirmed in July that it will end the demonstration at the close of 2026. The agency said it wants the program back under normal market conditions in 2027.

The subsidy was not small. TheStreet reported that it cut stand-alone plan premiums by about $16 a month on average in 2026. About 25 million people are in these stand-alone plans. KFF warned that some of them could see a bigger premium increase for 2027 than they have faced in recent years.

Federal officials have said most people should see increases under $10 a month. But outside analysts expect more pressure on premiums, according to Medical Daily. Your own number depends on your plan and where you live. That is exactly why the letter matters.

What else changes on January 1

The premium is only one line. The other limits in Part D are rising too.

The base beneficiary premium is a national benchmark, not your bill. Your plan can charge more or less. But the direction is clear. A person who fills a lot of prescriptions could pay more in premiums and more at the pharmacy counter in the same year.

The same pattern hit health plans earlier:

Your Health Insurance Bill Just Jumped 58% — Here’s What Actually Happened

Who should worry most

Not everyone will see their Medicare Part D premium going up by the same amount.

People in stand-alone drug plans feel this most, because the subsidy went to those plans. People in Medicare Advantage plans that include drug coverage get their drug premium bundled in. Their change can look different, so they still need to read their own letter.

People who get Extra Help, the low-income subsidy, are largely protected from these premium increases. If money is tight and you have never applied, it is worth checking whether you qualify. Many people who are eligible never sign up.

Nobody enjoys reading insurance mail at the kitchen table. But ten quiet minutes with this one letter can decide what you pay every month next year.

How to use the letter before October 15

Start with the premium. Find the 2026 amount and the 2027 amount. Write down the difference and multiply it by 12. That is what staying put costs you next year.

Next, check your drugs. Plans can move a drug to a higher tier or drop it. A premium that looks fine means little if your main prescription now costs double.

Then check your pharmacy. Preferred pharmacies can change. Your usual store might now charge more.

Last, compare. The free Medicare Plan Finder lets you enter your exact drugs and pharmacy. It then shows the total yearly cost for each plan in your area, not just the premium. The cheapest premium is not always the cheapest plan.

If you would rather talk to a person, every state has a free SHIP counseling program for Medicare questions. They do not sell plans.

A quick example of the cheapest premium trap

Here is a simple made-up example. It shows why the yearly total matters more than the monthly price.

Picture someone who takes three generic drugs and one brand-name drug. They look at two plans in Plan Finder.

Plan A looks cheaper every month. It costs $388 more by December. The difference comes from the deductible and the copay on that one brand-name drug. Plan Finder does this math for you once you enter your drugs. Always sort by total yearly cost, not by premium.

If your drug was dropped or moved to a higher tier

This is the change that hurts most, and many people only find out at the pharmacy in January.

First, check the letter for your exact drug names. Then call your doctor. There is often a similar drug on the plan’s list that works just as well.

If no alternative works, your doctor can ask the plan for an exception. That is a formal request to cover the drug anyway, or to charge a lower tier price. If the plan says no, you have the right to appeal.

You also get a safety net while this plays out. If your plan changed coverage for a drug you already take, it must give you a one-time transition refill. That is usually a 30-day supply, and you need to ask for it within the first 90 days of the new year.

If big pharmacy bills land all at once

Deductibles hit early in the year. For some people, January and February pharmacy bills can feel like a second rent payment.

Medicare has a free option for this called the Medicare Prescription Payment Plan. It does not lower what you owe. It spreads your out-of-pocket drug costs into monthly payments across the year, with no interest or fees. You sign up through your drug plan. It helps most if you expect high costs early in the year.

If your income is limited, apply for Extra Help through Social Security. It is free to apply, and it can cut both your premium and your copays. It is aimed at people with income up to about 150% of the federal poverty level and limited savings. Many people close to that line assume they earn too much and never check. Applying online takes about 30 minutes.

How switching actually works

Before you open Plan Finder, write down every drug you take, the dose, and how often you refill it. Those three details change the yearly estimate more than anything else.

Once you pick a new stand-alone drug plan, you simply enroll in it through Plan Finder or 1-800-MEDICARE. You do not need to cancel the old one. Joining the new plan ends the old plan automatically on December 31. The new plan starts January 1.

One warning. Many sites that rank for Medicare questions are run by insurance agents who earn commissions. Their advice can still be useful. But Plan Finder and your state SHIP counselor show every plan in your area, not just the ones someone gets paid to sell.

Premium changes, deductibles, and pharmacy costs add up fast when they land in different months. Writing each one down keeps the full picture in one place. Here is a free tracker for every monthly health bill you can start with today.

If you are still a few years away from Medicare:

Your 401(k) Catch-Up Contribution Rule Just Changed for 2026 — Here’s Who It Hits

Mistakes that cost people money every fall

The biggest one is doing nothing. Automatic renewal feels safe. It is often the most expensive choice.

The second is picking a plan by premium alone. A low premium with a high deductible can cost more if you take several drugs.

The third is waiting until December. Plan Finder and phone lines get busy near the deadline. Starting in October gives you time to ask questions.

And do not assume last year’s research still holds. With the subsidy gone, the plan that was cheapest in 2026 may not be cheapest in 2027.

When cost stops people from getting care:

92% of Americans Are Skipping Doctor Visits to Save Money — Here’s What That’s Actually Costing Them

The bottom line

Your Medicare Part D premium going up in 2027 is not a guess. The subsidy that held premiums down is gone, and the deductible and out-of-pocket cap are rising too. The good news is that you get the numbers in writing before you have to decide. Open the Annual Notice of Change, compare plans after October 15, and make a choice before December 7.

Have you opened your plan’s letter yet, or is it still sitting in the pile?

Disclaimer: MoneyWisePro is not an insurance agent or a financial advisor. This article is for general information only and is not insurance, medical, or financial advice. Check your own plan documents and contact Medicare or your state’s SHIP counselor before changing your coverage.