Medicare Part D Changes for 2027: What Every Beneficiary Needs to Know
A higher deductible, an updated out-of-pocket limit, and the end of a temporary premium stabilization program could affect your prescription drug costs in 2027.
By Leah Hill, Medicare Insurance Specialist | Lowcountry Insurance Brokers
Information current as of August 28, 2026
If you rely on Medicare Part D for prescription drug coverage, several important changes are coming in 2027. These include a higher standard deductible, an increased annual out-of-pocket limit, and the end of a temporary program designed to stabilize premiums for stand-alone prescription drug plans.
The Centers for Medicare & Medicaid Services (CMS) has released preliminary bid information and several benefit figures for 2027. However, individual plan premiums, formularies, pharmacy networks, and other plan-specific details will not be finalized until fall 2026.
Understanding the changes now can help you prepare to compare plans during Medicare Open Enrollment.
What Is Changing in Medicare Part D for 2027?
The primary Medicare Part D changes taking effect January 1, 2027, include:
- A standard deductible of up to $700
- An annual out-of-pocket limit of $2,400
- The conclusion of the temporary Part D Premium Stabilization Demonstration
- An increase in the national base beneficiary premium to $41.33
The redesigned Part D benefit structure remains in place. It generally includes a deductible phase, an initial coverage phase, and catastrophic coverage after the annual out-of-pocket limit is reached.
✓ Cross-Verified August 27, 2026
All figures were verified by Medicare insurance specialist Leah Hill and corroborated using CMS sources. — Lowcountry Insurance Brokers
What Is the Medicare Part D Deductible for 2027?
The standard 2027 Medicare Part D deductible is $700, up from $615 in 2026.
This is the maximum deductible a Part D plan may charge for covered medications before the plan begins sharing your prescription costs. Individual plans can offer a lower deductible, and some plans may apply the deductible only to medications on certain formulary tiers.
For example, a plan might provide coverage for preferred generic drugs before the deductible is met while applying the deductible to brand-name and specialty medications.
If you regularly take higher-cost medications, you may reach your deductible early in the year. Reviewing your plan’s deductible and formulary can help you anticipate what you may owe at the pharmacy in January and February.
The 2027 Part D Out-of-Pocket Limit Is $2,400
Medicare Part D will have a $2,400 annual out-of-pocket limit in 2027, up from $2,100 in 2026.
After the amount counted toward your Part D out-of-pocket limit reaches $2,400, you enter the catastrophic coverage phase. During this phase, you generally pay $0 for covered Part D medications for the remainder of the calendar year.
Certain payments made on your behalf may also count toward this limit. However, your monthly plan premium and spending on medications that are not covered by your plan generally do not count.
The $2,400 limit is an important protection for beneficiaries who take expensive medications, even though the limit is $300 higher than it was in 2026.
Who Will Be Affected by the 2027 Part D Changes?
The higher deductible and out-of-pocket limit apply broadly to the standard Medicare Part D benefit, including drug coverage offered through:
- Stand-alone Medicare Prescription Drug Plans, or PDPs
- Medicare Advantage plans that include prescription drug coverage, or MA-PDs
The end of the Premium Stabilization Demonstration most directly affects the stand-alone Part D market because the program applied specifically to participating PDPs.
In 2026, approximately 24.9 million people were enrolled in stand-alone Part D plans, according to KFF’s analysis of CMS enrollment data.
Your plan’s Annual Notice of Change will explain how its premium, deductible, formulary, pharmacy network, and cost-sharing requirements will change for 2027. Plans generally send this notice in September.
When Is Medicare Open Enrollment for 2027 Coverage?
Medicare’s Annual Enrollment Period runs from October 15 through December 7, 2026, for coverage beginning January 1, 2027.
During this period, you can:
- Join, change, or leave a Medicare Advantage plan
- Join or change a stand-alone Medicare Part D plan
- Return from Medicare Advantage to Original Medicare
- Review whether your current drug coverage will still meet your needs in 2027
Changes selected during this enrollment period generally take effect on January 1, 2027.
What Should You Do Before Medicare Open Enrollment?
Taking a few steps before October 15 can make it easier to compare your 2027 options.
1. Make a Current Medication List
Write down each medication’s name, dosage, quantity, and how often you refill it. Include both brand-name and generic medications.
2. Review Your Annual Notice of Change
Read the notice your current plan sends in September. Pay particular attention to changes involving:
- Monthly premiums
- Deductibles
- Drug formularies
- Medication tiers
- Copayments and coinsurance
- Prior-authorization requirements
- Preferred pharmacies
- Mail-order options
3. Confirm That Your Medications Are Covered
A plan that worked well in 2026 may change its formulary or move one of your prescriptions to a more expensive tier for 2027.
4. Check Your Preferred Pharmacies
Prescription costs can vary depending on whether you use a preferred, standard, or out-of-network pharmacy.
5. Compare Your Total Estimated Annual Cost
Do not choose a plan based only on its monthly premium. Consider the combined cost of premiums, deductibles, copayments, coinsurance, and your specific medications.
6. Ask for Help If You Need It
A licensed, independent Medicare insurance agent can help you compare available plans and understand how each option covers your prescriptions.
Our Medicare Part D plan services explain what to consider when evaluating prescription drug coverage.
The Bottom Line
The Medicare Part D changes for 2027 include a standard deductible of up to $700, a $2,400 annual out-of-pocket limit, and the conclusion of the temporary Premium Stabilization Demonstration for stand-alone drug plans.
These national changes are important, but they do not reveal exactly what your plan will cost. Individual premiums, formularies, pharmacy networks, and medication costs can vary considerably from one plan to another.
Review your Annual Notice of Change when it arrives in September, then compare your options during Medicare’s Annual Enrollment Period from October 15 through December 7, 2026.
Ready to Review Your 2027 Medicare Part D Options?
Talk with Lowcountry Insurance Brokers for a no-pressure conversation about your prescription drug coverage and available plan options.
Request Medicare Part D HelpOr visit our Medicare Part D plans page.
Fact-Checked Sources
Figures in this article were checked against official CMS information and supporting industry reports. Primary sources are listed first.
Primary and Official Sources
- CMS Fact Sheet: Medicare Part D 2027 National Average Monthly Bid Amount Information — confirms the $41.33 base beneficiary premium for 2027 and the 6% annual growth cap under the Inflation Reduction Act.
- CMS/HHS July 28, 2026 Parts C and D Announcement — confirms the $41.33 base beneficiary premium, $2 de minimis amount, and conclusion of the Part D Premium Stabilization Demonstration.
Deductible and Out-of-Pocket Limit
- UnitedHealthcare: How Medicare Part D Is Changing in 2027 — confirms the $2,400 out-of-pocket limit and $700 deductible.
- Axene Health Partners: 2027 Medicare Advantage and Part D Advance Notice Deep Dive — reviews the deductible increase from $615 to $700 and the out-of-pocket threshold increase from $2,100 to $2,400.
Premium Stabilization Demonstration and Base Premium
- AMCP Regulatory NewsBreak — reports the $296.05 bid amount, $41.33 base beneficiary premium, and conclusion of the demonstration.
- Managed Healthcare Executive: CMS Sets the 2027 Part D Bid Amount — reports the increase in the base beneficiary premium from $38.99 to $41.33.