Of all the 2027 Medicare numbers, the stand-alone Part D premium looks like the calmest: an average of about $36 a month, barely a dollar more than this year. It is tempting to read that as "nothing is changing" and let your drug plan renew itself. That would be a mistake.
The average is calm because it blends plans moving in opposite directions. What your premium will be in 2027 depends on your plan — and what you will actually spend depends on three things the premium never shows: the deductible, your drug list, and your pharmacy. Here is how to check all of them before December 7.
1. The $36 Average, and the Program That Used to Hold It Down
The Centers for Medicare & Medicaid Services (CMS) projects the average premium for stand-alone Part D plans at about $36 a month in 2027, up from $35.09 in 2026. Behind that gentle slope is a policy change: a temporary federal demonstration program that paid plans to keep premiums down in 2025 and 2026 has ended.
Without that support, plans are repricing on their own. Some premiums are nearly flat; others are rising sharply. Analysts also note there will be no stand-alone Part D plans with a $0 premium in 2027 for people who do not receive Extra Help. If your plan's 2027 premium, printed in your Annual Notice of Change, jumped well beyond a dollar or two, that is your signal to compare — the average says other plans priced this year differently.
2. What the Premium Hides, Part One: The $700 Deductible
Under the standard Part D benefit, the maximum deductible rises to $700 in 2027, up from $615 in 2026. Until you have paid that amount for covered drugs, you are paying the plan's negotiated prices largely out of your own pocket.
Plans differ in how they apply it. Some charge less than $700, a few charge none, and some apply the deductible only to drugs on higher tiers, so your everyday generics may be covered from the first fill of the year. Two plans with identical premiums can therefore treat your January very differently. When you compare, find the deductible line and check which of your medications it applies to — especially if you fill an expensive prescription early in the year.
3. What the Premium Hides, Part Two: Your Drugs and Their Tiers
Every Part D plan keeps a formulary — its list of covered drugs, sorted into tiers with different costs. Lower tiers usually mean fixed, modest copays. Higher tiers often mean coinsurance, a percentage of a price that can be startling for specialty medicines. Plans may also require prior authorization or step therapy before covering a drug.
Formularies change every year. A drug that sat comfortably on a low tier in 2026 can move up, gain a restriction, or leave the list. The only reliable check is personal: take your actual medication list, with dosages, and look up each drug in each plan you are considering. The Plan Compare tool at Medicare.gov does this arithmetic for you once you enter your list — it is the single most useful half hour of this enrollment season if you take regular prescriptions.
4. What the Premium Hides, Part Three: Your Pharmacy's Status
Part D plans negotiate with pharmacy networks, and most plans sort pharmacies into preferred and standard cost-sharing levels. The same prescription, in the same plan, can cost noticeably more at a standard pharmacy than at a preferred one. Mail-order pharmacies sometimes offer the preferred price on 90-day supplies.
Networks change, too. If your neighborhood pharmacy drops from preferred to standard status in your plan for 2027, every refill quietly costs more all year — a change no premium headline will ever mention. When you run a comparison, enter the pharmacy you actually use, and check its status in each plan. If another plan keeps your pharmacy preferred, that fact alone can outweigh a difference in premiums.
5. Compare on Total Yearly Cost: A Short Checklist
- Premium: The plan's 2027 monthly premium, multiplied by 12
- Deductible: Up to $700 in 2027 — and which of your drugs it applies to
- Drug costs: Your medications, at their 2027 tiers, across a full year
- Pharmacy: Your pharmacy's preferred or standard status in the plan
- Total: Add the four lines. That sum — not the premium — is the price of the plan
If comparing feels overwhelming, your local State Health Insurance Assistance Program (SHIP) offers free, unbiased help, and counselors there work with these exact questions every day. Bring your medication list and your current plan's notice, and they will help you run the numbers for your situation.
Key Takeaway
The projected $36 average stand-alone Part D premium for 2027 is only the entry fee. The real cost of a drug plan lives in its deductible — up to $700 next year — in the tiers your personal medications land on, and in whether your pharmacy keeps its preferred status. Before December 7, compare plans on your estimated total yearly cost using your own drug list at Medicare.gov. A plan with a slightly higher premium regularly wins that comparison, and a plan with a bargain premium regularly loses it.
This article was written with the help of generative AI.
For general information only, not medical advice.
Consult a qualified professional for your situation.








