Medicare Part D 2027: $700 Deductible, $2,400 Out-of-Pocket Cap and Premium Changes
Medicare Part D 2027: $700 Deductible, $2,400 Out-of-Pocket Cap and Premium Changes
Medicare Part D prescription drug coverage is changing again in 2027, and some of the most important numbers are already final.
The defined-standard Medicare Part D deductible will rise to $700 in 2027, while the annual out-of-pocket threshold will increase to $2,400.
At the same time, the Centers for Medicare & Medicaid Services (CMS) projects the average monthly premium for stand-alone Medicare Part D plans at approximately $36 in 2027, compared with $35.09 in 2026.
That means beneficiaries could face a relatively modest change in average premiums but a considerably larger increase in the standard deductible and annual out-of-pocket threshold.
There are also other significant Medicare prescription drug developments coming in 2027, including new negotiated prices for selected high-cost drugs.
With Medicare Open Enrollment running from October 15 through December 7, 2026, beneficiaries should compare their 2027 drug coverage carefully instead of focusing on the monthly premium alone.
Here are the Medicare Part D costs and changes to know for 2027.
Medicare Part D 2027 Changes at a Glance
| Medicare Part D cost | 2026 | 2027 | Change |
|---|---|---|---|
| Defined-standard deductible | $615 | $700 | +$85 |
| Annual out-of-pocket threshold | $2,100 | $2,400 | +$300 |
| Average stand-alone Part D premium | $35.09 | About $36 projected | About +$0.91 |
| Part D base beneficiary premium | — | $41.33 | Technical benchmark |
| Average Part D premium in MA-PD plans | $11.32 | $7 projected | -38% |
| Medicare Open Enrollment | Oct. 15–Dec. 7 | Oct. 15–Dec. 7, 2026 | 2027 coverage |
| Catastrophic-phase cost sharing | $0 | $0 | Continues |
The $700 deductible and $2,400 annual out-of-pocket threshold are finalized 2027 Part D parameters.
The approximately $36 stand-alone premium is a national average projected by CMS. Your individual plan premium can be significantly higher or lower.
CMS published the finalized benefit parameters in its 2027 Medicare Advantage and Part D Rate Announcement.
What Is the Medicare Part D Deductible for 2027?
The defined-standard Medicare Part D deductible will be:
$700 in 2027
That is up from:
$615 in 2026
The dollar increase is:
$700 − $615 = $85
Percentage increase:
$85 ÷ $615 × 100 = approximately 13.8%
This is one of the biggest Medicare Part D cost changes beneficiaries should watch for 2027.
However, the $700 figure should not be interpreted to mean every prescription drug plan will require beneficiaries to pay exactly $700 before coverage begins.
It is the deductible under the defined-standard Part D benefit.
Individual Part D plans can have different benefit designs within Medicare rules, including deductibles lower than the standard amount.
When comparing plans, check the actual deductible listed for the plan rather than assuming it will automatically be $700.
Medicare Part D Out-of-Pocket Threshold Rises to $2,400
The annual Medicare Part D out-of-pocket threshold will also increase in 2027.
For 2026, the threshold is:
$2,100
For 2027:
$2,400
The increase is:
$2,400 − $2,100 = $300
Percentage increase:
$300 ÷ $2,100 × 100 = approximately 14.3%
The out-of-pocket threshold is especially important for beneficiaries who use expensive prescription medications.
Once the applicable Part D out-of-pocket threshold is reached, beneficiaries enter catastrophic coverage.
CMS has codified the redesigned Part D structure for 2027 and beyond, including no enrollee cost sharing for covered Part D drugs in the catastrophic phase.
In simple terms, once qualifying Part D out-of-pocket spending reaches the annual threshold, covered Part D drugs can have $0 beneficiary cost sharing for the remainder of that calendar year under the catastrophic phase rules.
The official CMS 2027 Part D parameters are available in the 2027 Rate Announcement.
What Counts Toward the $2,400 Part D Threshold?
The $2,400 figure is not simply a limit on every health-care expense a Medicare beneficiary pays.
It applies to qualifying out-of-pocket spending under Medicare Part D rules.
Expenses associated with covered Part D prescription drugs can count toward the threshold according to Medicare’s True Out-of-Pocket, or TrOOP, rules.
The threshold is separate from expenses such as:
- Medicare Part B premiums;
- Medicare Advantage medical copays;
- Medigap premiums;
- costs for drugs that are not covered by the Part D plan; and
- unrelated medical expenses.
This distinction matters.
Someone could spend substantially more than $2,400 across all health-care expenses during the year even though Part D includes a $2,400 prescription drug out-of-pocket threshold.
What Is the Average Medicare Part D Premium for 2027?
CMS projects the average monthly premium for stand-alone Medicare Part D plans at approximately:
$36 per month in 2027
The 2026 average is:
$35.09 per month
The difference is approximately:
$36.00 − $35.09 = $0.91 per month
Across 12 months:
$0.91 × 12 = $10.92
So at the national average, the projected increase is relatively modest.
But the average can hide large differences among individual plans.
Some beneficiaries may find plans with premiums considerably below $36, while others could face higher premiums depending on location and plan choice.
CMS says beneficiaries should compare available plans during Open Enrollment because premiums, covered drugs and pharmacy arrangements can change each year.
Why Does CMS Also List a $41.33 Part D Premium?
You may see another 2027 Medicare Part D number:
$41.33
This is the 2027 Part D base beneficiary premium.
It is not the same thing as saying every beneficiary will pay $41.33 per month.
CMS explains that the national base beneficiary premium is a technical starting point used in the statutory formula for calculating plan-specific basic Part D premiums.
For 2027, CMS set that base beneficiary premium at $41.33.
Actual plan premiums depend on individual plan bids, government subsidies, plan design and other factors.
That’s why CMS can report:
$41.33 base beneficiary premium
while simultaneously projecting:
about $36 average stand-alone Part D plan premium
The two figures measure different things.
CMS explains the distinction in its Medicare Part D 2027 National Average Monthly Bid Amount information.
Medicare Advantage Drug Premiums Are Projected to Fall
The Part D outlook is different for people who get prescription drug coverage through a Medicare Advantage plan.
Medicare Advantage plans that include drug coverage are commonly known as MA-PD plans.
CMS projects the average monthly Part D premium component in MA-PD plans to fall from:
$11.32 in 2026
to:
$7.00 in 2027
Difference:
$11.32 − $7.00 = $4.32 per month
That represents an approximately:
38% decline
Over 12 months:
$4.32 × 12 = $51.84
This is another national average.
Actual Medicare Advantage drug costs vary significantly by plan and location.
For retirees comparing Medicare costs with Social Security income, see our guide to 2027 Social Security benefit changes, COLA, retirement age and Medicare.
What Happens After You Reach the $2,400 Part D Threshold?
Medicare Part D now uses a simplified three-stage benefit structure:
- Deductible stage
- Initial coverage stage
- Catastrophic coverage stage
Deductible Stage
If your plan has a deductible, you generally pay applicable prescription drug costs until the plan’s deductible is satisfied.
Under the defined-standard benefit, that deductible is $700 in 2027.
Initial Coverage Stage
After the applicable deductible, you and your plan share covered drug costs according to the plan’s benefit structure.
Under the defined-standard benefit, beneficiary cost sharing is generally structured around the standard Part D rules until qualifying out-of-pocket spending reaches the annual threshold.
Catastrophic Coverage Stage
Once qualifying out-of-pocket spending reaches $2,400 in 2027, the beneficiary enters catastrophic coverage.
CMS has maintained no enrollee cost sharing for covered Part D drugs during the catastrophic phase.
That protection can be particularly valuable for beneficiaries using very expensive medications.
Is the Medicare Part D “Donut Hole” Coming Back in 2027?
No traditional coverage-gap or “donut hole” phase returns in 2027.
CMS finalized regulations codifying the redesigned Medicare Part D benefit structure for 2027 and beyond.
The redesigned structure eliminates the former coverage-gap phase and uses the deductible, initial coverage and catastrophic phases instead.
This is important because many beneficiaries still remember the old Part D structure, where prescription drug costs could change significantly after entering the coverage gap.
The modern Part D benefit works differently.
CMS explains the changes in its Contract Year 2027 Medicare Advantage and Part D Final Rule.
New Negotiated Medicare Drug Prices Take Effect in 2027
Another major Medicare prescription drug development begins January 1, 2027.
CMS negotiated lower prices for 15 selected high-cost Medicare Part D drugs as part of the second cycle of the Medicare Drug Price Negotiation Program.
The negotiated prices—called Maximum Fair Prices under the law—are scheduled to take effect in 2027 for the applicable selected drugs.
CMS estimated that the negotiated prices could produce substantial savings for Medicare and beneficiaries.
According to CMS, approximately 5.3 million Medicare Part D beneficiaries used the selected drugs during the period CMS analyzed.
The medicines are used for conditions including:
- cancer;
- diabetes;
- asthma;
- chronic obstructive pulmonary disease; and
- other chronic conditions.
Actual savings for an individual beneficiary will depend on factors including their prescription, plan coverage and cost-sharing structure.
You can review the latest official information through the CMS Medicare Drug Price Negotiation Program.
Does Medicare Still Limit Insulin Costs in 2027?
Medicare continues to limit beneficiary cost sharing for covered insulin.
Medicare.gov states that a beneficiary generally pays no more than $35 for a one-month supply of each covered insulin product, subject to applicable Medicare rules.
The Part D deductible does not apply to covered insulin in the same way as ordinary Part D drugs.
That means someone using covered insulin should not assume they must first satisfy the full $700 standard deductible before receiving the insulin cost protection.
Medicare provides details on its official insulin coverage page.
What About Vaccines Under Medicare Part D?
Certain recommended adult vaccines covered under Medicare Part D continue to receive special cost protections.
The redesigned Part D rules include no enrollee cost sharing for qualifying adult vaccines recommended by the Advisory Committee on Immunization Practices and covered under Part D.
Beneficiaries should still confirm that a vaccine and its administration are covered under the appropriate part of Medicare.
Medicare Prescription Payment Plan Continues in 2027
Beneficiaries with Medicare drug coverage can also use the Medicare Prescription Payment Plan.
This program allows eligible prescription drug out-of-pocket costs to be spread across the calendar year instead of requiring all of the cost at the pharmacy at the time a prescription is filled.
However, there is a critical point:
The Medicare Prescription Payment Plan does not reduce the total cost of your drugs.
It changes the timing of payments, not the total amount owed.
For example, someone facing high prescription costs early in the year may find it easier to manage monthly cash flow by spreading those costs across several months.
Participation is voluntary.
Medicare says all Medicare drug plans and Medicare Advantage plans with drug coverage offer this payment option.
More information is available through the Medicare Prescription Payment Plan.
When Is Medicare Open Enrollment for 2027 Part D Coverage?
Medicare Open Enrollment runs from:
October 15 through December 7, 2026
Changes selected during the annual Open Enrollment Period generally take effect:
January 1, 2027
During this period, beneficiaries can compare Medicare prescription drug plans and Medicare Advantage plans that include prescription drug coverage.
This is especially important because a plan that worked well in 2026 may change for 2027.
Changes can include:
- monthly premiums;
- deductibles;
- prescription formularies;
- drug tiers;
- copayments;
- coinsurance;
- prior authorization requirements;
- preferred pharmacy networks; and
- mail-order pharmacy arrangements.
Medicare beneficiaries can compare plans using the official Medicare Plan Finder.
What Should You Compare Before Choosing a 2027 Part D Plan?
Choosing a Medicare Part D plan based only on its monthly premium can be a costly mistake.
Consider the following factors.
1. Your Prescription List
Enter every medication you regularly take when comparing plans.
A cheap plan can become expensive if one of your prescriptions is placed on a high formulary tier.
2. Drug Formulary
Confirm that each medication is covered.
If a medication is not on the plan’s formulary, you may face a much higher cost unless an exception applies.
3. Drug Tiers
Prescription drugs are often grouped into different cost-sharing tiers.
A plan may cover your medication but place it on a tier with significantly higher copayments or coinsurance.
4. Pharmacy Network
Check whether your preferred pharmacy is considered:
- in-network;
- preferred; or
- standard.
A preferred pharmacy may offer lower costs than another participating pharmacy under the same plan.
5. Deductible
Do not assume every plan has a $700 deductible.
The $700 amount is the 2027 defined-standard deductible.
Individual plans may structure their deductible differently within Medicare rules.
6. Total Annual Drug Cost
Compare estimated yearly costs instead of focusing only on the premium.
A $10 monthly difference in premiums equals only:
$10 × 12 = $120 per year
A single expensive drug placed on a less favorable formulary tier could potentially matter much more.
7. Prior Authorization and Other Restrictions
Some drugs can require:
- prior authorization;
- step therapy; or
- quantity limits.
These rules can affect convenience and access even when the medication is technically covered.
Why Retirees Should Consider Social Security and Medicare Together
Prescription drug expenses are only one part of a retiree’s overall Medicare costs.
Many beneficiaries also pay Medicare Part B premiums, Medicare Advantage premiums or supplemental insurance costs.
At the same time, Social Security beneficiaries are waiting for their final 2027 cost-of-living adjustment.
To estimate the potential change in monthly Social Security income, use our Social Security COLA 2027 Calculator.
You can also review our Social Security Benefit Increase Projection for 2027.
These issues are connected because higher retirement benefits do not automatically mean a beneficiary has the same amount of additional spending money after health-care costs and other deductions.
Frequently Asked Questions
What Is the Medicare Part D Deductible for 2027?
The defined-standard Medicare Part D deductible is $700 in 2027, up from $615 in 2026.
That is an $85 increase, or approximately 13.8%.
What Is the Medicare Part D Out-of-Pocket Maximum for 2027?
The annual defined-standard Part D out-of-pocket threshold is $2,400 in 2027, up from $2,100 in 2026.
After a beneficiary reaches the applicable threshold, covered Part D drugs have no enrollee cost sharing in the catastrophic phase under the redesigned Part D structure.
What Is the Average Medicare Part D Premium for 2027?
CMS projects the average monthly premium for stand-alone Medicare Part D plans at approximately $36 in 2027, compared with $35.09 in 2026.
Individual plan premiums vary.
Why Is the 2027 Part D Base Beneficiary Premium $41.33?
The $41.33 base beneficiary premium is a technical figure used in the statutory formula for determining plan-specific premiums.
It does not mean every Part D beneficiary pays $41.33 per month.
Is Medicare Part D Ending in 2027?
No.
Medicare Part D prescription drug coverage continues in 2027.
The benefit structure, premiums and certain cost parameters are changing, but Part D is not ending.
Does Medicare Part D Still Have a Donut Hole in 2027?
The traditional coverage-gap or “donut hole” phase is no longer part of the redesigned Part D benefit.
The benefit now uses deductible, initial coverage and catastrophic phases.
What Happens After I Spend $2,400 on Part D Drugs?
Once applicable qualifying out-of-pocket spending reaches the annual Part D threshold, the beneficiary enters catastrophic coverage and owes no cost sharing for covered Part D drugs for the remainder of the calendar year.
Will Insulin Still Cost $35 or Less in 2027?
Medicare continues to limit cost sharing for covered insulin products. Medicare.gov says beneficiaries generally pay no more than $35 for a one-month supply of each covered insulin product.
Can I Spread My Prescription Drug Costs Over the Year?
Yes.
The Medicare Prescription Payment Plan allows beneficiaries with Medicare drug coverage to spread applicable out-of-pocket prescription drug costs across the calendar year.
The program does not reduce the total amount owed.
When Can I Change My Part D Plan for 2027?
Medicare Open Enrollment runs from October 15 through December 7, 2026.
Changes generally take effect January 1, 2027.
Should I Keep My Current Part D Plan?
Do not decide based only on the plan name or premium.
Review your 2027 prescriptions, formulary, deductible, pharmacies, copayments and expected annual cost before deciding.
Medicare Part D is entering 2027 with several important cost changes.
The biggest confirmed figures are:
$700 defined-standard deductible
$2,400 annual out-of-pocket threshold
About $36 projected average monthly stand-alone Part D premium
The deductible increases by $85 from 2026, while the out-of-pocket threshold rises by $300.
Once qualifying Part D spending reaches the applicable $2,400 threshold, beneficiaries enter catastrophic coverage and owe no cost sharing for covered Part D drugs for the rest of the year.
CMS is also implementing negotiated prices for selected high-cost Part D medications in 2027, while Medicare’s insulin protections and Prescription Payment Plan continue.
With Open Enrollment running from October 15 through December 7, 2026, beneficiaries should compare the total expected yearly cost of available plans rather than choosing coverage based only on the monthly premium.
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