CMS confirmed the 2027 Medicare Part D deductible, premium, and out-of-pocket figures on July 28 — and the widely repeated “6% cap” doesn’t work the way most coverage suggests.
Every year, Orange County seniors on a standalone Medicare Part D drug plan get an Annual Notice of Change (ANOC) letter that has to land in their mailbox by September 30. This year’s letter carries more real change than usual. On July 28, 2026, the Centers for Medicare & Medicaid Services confirmed the 2027 Part D benefit numbers and, in the same announcement, said a temporary subsidy that has been quietly propping up standalone drug plan pricing since 2025 is going away. Separately, an April 6 CMS rate announcement raised the standard deductible by $85 and the out-of-pocket spending threshold by $300. None of this means panic is the right response — but it does mean this year’s ANOC letter is worth reading line by line instead of setting aside with the rest of the mail.
What CMS Actually Confirmed for 2027
Two separate CMS documents carry the 2027 Part D numbers, and most secondary coverage only quotes one of them. The July 28, 2026 Parts C & D Announcement set the national average monthly bid amount (NAMBA) at $296.05 and the national base beneficiary premium at $41.33 for 2027, along with a $2 de minimis amount. The April 6, 2026 CY2027 Rate Announcement, a separate document released months earlier, carries the standard deductible and out-of-pocket threshold: the deductible rises from $615 to $700, and the out-of-pocket spending threshold rises from $2,100 to $2,400.
| Part D Benefit Parameter | 2026 | 2027 |
|---|---|---|
| National Base Beneficiary Premium | $38.99 | $41.33 |
| National Average Monthly Bid Amount (NAMBA) | — | $296.05 |
| Standard Deductible | $615 | $700 |
| Out-of-Pocket Spending Threshold | $2,100 | $2,400 |
| De Minimis Amount | — | $2 |
| Premium Stabilization Demonstration | Active (final year) | Ends after CY2026 |
The $85 deductible increase is the number most households will actually feel first, since it applies before a standalone plan starts sharing any drug costs. CMS’s own math for the premium figure is printed directly in the July 28 announcement: 2026’s base beneficiary premium of $38.99, multiplied by the 6% statutory cap, rounds to $41.33 for 2027.
The “6% Cap” Doesn’t Mean What Most Headlines Imply
This is the detail that gets flattened almost every time this story runs. The Inflation Reduction Act’s premium stabilization provision caps the year-over-year increase in the national base beneficiary premium — a single benchmark figure CMS calculates and uses in its subsidy formula — at 6% per year through 2029. It is not a cap on what any individual Part D plan can charge its own enrollees. A specific standalone plan’s 2027 premium can rise well above 6%, stay flat, or even drop, depending entirely on that plan’s own bid. The national figure moving by exactly 6% tells you almost nothing about what your own plan will actually charge next year.
The subsidy ending after this year specifically touched standalone prescription drug plan pricing — not every Medicare enrollee’s drug coverage works the same way.
The Subsidy That’s Quietly Going Away
Since 2025, CMS has run the Part D Premium Stabilization Demonstration, a voluntary program that softened swings in standalone drug plan premiums while the industry adjusted to the IRA’s redesigned Part D benefit. In the same July 28 announcement that set the 2027 numbers, CMS said it will end that demonstration after CY2026. The agency’s stated reasoning is straightforward: its review of 2027 bid submissions found that Part D plan sponsors now have enough pricing experience under the new benefit design to operate under, in CMS’s own words, “traditional market conditions” again in 2027.
The practical upshot is that the cushion standalone plans have priced against for two years is being removed at the same time deductibles and the out-of-pocket threshold are both rising. That doesn’t guarantee premium spikes — sponsors compete for enrollment and some may hold pricing steady — but it does mean 2027 premium movement, up or down, is likely to look less uniform across plans than it has the last two years.
Who This Actually Touches — and Who It Doesn’t
The demonstration applied specifically to standalone Part D plan (PDP) bids, and that scope matters for figuring out whether any of this affects your own coverage.
Quick Gut-Check
- On a standalone Part D plan (a separate drug plan alongside Original Medicare)? This change is directly relevant to your 2027 ANOC.
- On a Medicare Advantage plan that includes drug coverage (MA-PD)? Your premium follows separate MA bidding rules — review your own plan’s Annual Notice of Change rather than assuming this demonstration’s end applies the same way.
- Enrolled in Extra Help (the Low-Income Subsidy)? That program is entirely separate and is not affected by any of this.
That last point is worth repeating on its own, because it’s the distinction most likely to cause needless worry. Extra Help continues under its own eligibility rules regardless of what happens to the Premium Stabilization Demonstration. A household juggling both Medi-Cal and Medicare should not read this article as any signal that their subsidy is in jeopardy.
Comparing this year’s ANOC line by line against last year’s is the single most useful thing to do before December 7.
Before Your ANOC Letter Arrives
Every Part D and Medicare Advantage plan is required to mail its enrollees an Annual Notice of Change by September 30, ahead of Medicare’s annual Open Enrollment period, which runs October 15 through December 7. Our earlier guide on what to check on your ANOC letter before December 7 covers the document itself in detail. This year, the highest-value additions to that checklist are specific to the changes above: confirm whether your plan’s deductible moved along with the new $700 standard, check whether your out-of-pocket threshold changed, and don’t assume a premium change on your letter tracks the 6% national figure one way or the other — your plan’s bid is its own number. If you’re also watching other Medicare costs, our coverage of the 2026 Part B premium increase looks at the medical-coverage side of the same annual cycle.
Free, Local Help Comparing Your Options
Sorting a real ANOC letter against last year’s plan, or comparing several standalone drug plans against each other, is exactly the kind of task the federally funded State Health Insurance Assistance Program exists for. In Orange County, this counseling is delivered through HICAP, the Health Insurance Counseling and Advocacy Program, coordinated locally through the OC Office on Aging. Counseling is free, one-on-one, and not tied to selling any particular plan.
Where to Get Help Before December 7
- OC Office on Aging — free HICAP counseling appointments for plan comparisons and ANOC questions
- Medicare’s own Plan Finder tool at medicare.gov, once the September landscape files are live
- 1-800-MEDICARE for general questions about your specific plan or ANOC letter
- Your current plan’s member services line, listed directly on your ANOC letter
Before December 7: A Family Checklist
Use this list once your ANOC letter arrives, or now if you want to get ahead of it.
- Watch your mailbox for your ANOC letter, which must arrive by September 30
- Compare your 2027 ANOC against your 2026 plan documents for any premium or deductible change
- Check whether your regular prescriptions are still covered at the same formulary tier
- Confirm your usual pharmacy is still in-network for 2027
- If you’re on a standalone Part D plan, remember the temporary premium-stabilization subsidy ends after this year
- If you’re on Medicare Advantage with drug coverage, review your MA-PD’s own 2027 notice separately
- Don’t assume the 6% cap limits your personal premium — it only limits the national base figure
- Wait for CMS’s landscape files, released mid-to-late September, before comparing real plan premiums
- If you receive Extra Help, confirm your subsidy continues automatically and is unaffected
- Call HICAP through the OC Office on Aging for free, unbiased help before December 7
Test Your Knowledge: 2027 Part D Changes
Answer each question to see the correct response instantly.
1. What does the IRA’s “6% cap” actually limit?
2. What is the 2027 standard Part D deductible, and how much did it rise from 2026?
3. Which CMS program is ending after CY2026?
4. By what date must your ANOC letter reach you?
5. Which group is untouched by the end of the Premium Stabilization Demonstration?
Frequently Asked Questions
Care That Keeps Up With Changing Costs
At Home VA Staffing helps Orange County families keep in-home care steady, even as Medicare costs and coverage details shift year to year. If your family needs a hand coordinating care while you sort through open enrollment, we’re here to help.
This article summarizes CMS’s July 28, 2026 CY2027 Parts C & D Announcement and the April 6, 2026 CY2027 Rate Announcement, as publicly available on August 27, 2026, and is for general informational purposes only. It is not insurance, legal, or financial advice. Plan-specific 2027 premiums were not yet public as of this writing; consult your plan’s Annual Notice of Change, CMS’s September landscape files, or a HICAP counselor through the OC Office on Aging for guidance specific to your coverage. AHVA is a licensed non-medical home care organization and does not sell or administer Medicare plans.
