Medicare Part D plans for 2027 are entering a new enrollment cycle with important changes to premiums, deductibles, plan availability and prescription coverage. While federal officials expect the average premium for stand-alone prescription drug coverage to remain relatively stable, the experience will vary widely depending on the plan, location, medications and pharmacy a beneficiary uses.
The annual Medicare Open Enrollment period begins October 15, 2026, and ends December 7, 2026. Coverage selected during this period generally begins January 1, 2027. With insurers changing their offerings for the new year, beneficiaries should review their coverage carefully instead of automatically keeping the same prescription plan.
What Is Changing for Medicare Prescription Drug Coverage in 2027?
The overall Part D market is entering 2027 with a mixture of stability and significant individual changes.
The Centers for Medicare & Medicaid Services expects the average monthly premium for stand-alone Part D prescription drug plans to increase from approximately $35.09 in 2026 to $36 in 2027. That represents an increase of less than $1 per month nationally.
However, the national average does not reflect what every beneficiary will pay.
Individual plan premiums can vary considerably by state and prescription drug plan. Some beneficiaries may see little change, while others could face much larger increases if they remain enrolled in their current plan.
That makes the annual comparison period particularly important for people who take several medications or have prescriptions with high out-of-pocket costs.
The Standard Part D Deductible Will Rise to $700
One of the clearest changes for 2027 is the increase in the standard Part D deductible.
The standard deductible will be $700 in 2027, compared with $615 in 2026. This means beneficiaries in plans using the standard deductible structure could have more prescription expenses before the plan begins paying according to its applicable cost-sharing rules.
Not every plan necessarily uses the maximum standard deductible in the same way. Some plans can offer different deductible arrangements, and the deductible may apply differently across drug tiers.
For that reason, beneficiaries should examine the actual deductible for each plan rather than assuming every Part D plan will require the full $700.
The deductible is also only one part of the overall cost. A plan with a higher deductible may still produce a lower annual expense if it has favorable premiums and lower cost-sharing for the medicines a beneficiary takes regularly.
The Annual Part D Out-of-Pocket Limit Is $2,400
Another important 2027 figure is the annual Part D out-of-pocket threshold.
For 2027, the threshold is $2,400 for covered Part D drugs under the standard benefit structure.
After reaching the applicable annual out-of-pocket limit for covered Part D medications, beneficiaries generally pay nothing for covered Part D drugs for the remainder of the calendar year.
This protection is especially significant for people who use expensive specialty medicines or multiple high-cost prescriptions.
However, beneficiaries should remember that not every healthcare expense is counted toward the Part D limit. The protection applies to covered Part D drugs and follows Medicare’s specific rules for calculating qualifying out-of-pocket spending.
There Will Be Fewer Stand-Alone Part D Plans
Beneficiaries will have fewer stand-alone prescription drug plan choices in many parts of the country in 2027.
Analysis of the latest federal plan data shows that the average beneficiary will have access to approximately nine stand-alone Part D plans, compared with about 11 in 2026.
The total number of stand-alone prescription drug plans nationwide is also falling. Approximately 316 plans from 15 parent organizations are expected to be available in 2027, compared with about 360 plans from 17 parent organizations in 2026.
The number of available plans differs by location. Some states will have eight plans, while others will have more choices.
This reduction does not mean beneficiaries will lose access to prescription coverage. Instead, it means that comparing the plans actually available in a person’s ZIP code becomes even more important.
Some Beneficiaries Could See Large Premium Increases
The relatively small national average increase in premiums should not create the impression that every beneficiary will experience a small change.
Some existing Part D enrollees could face substantially higher premiums in 2027 if they remain in their current plans.
Recent analysis of the new plan data found that certain national prescription drug plans could have monthly increases of $50 or more in some states. In some locations, increases can be even larger.
That creates a potential problem for beneficiaries who automatically remain enrolled without checking the new pricing.
For someone paying an additional $50 every month, the difference could amount to hundreds of dollars over a year. A larger premium could also coincide with changes in deductibles, drug tiers or other cost-sharing requirements.
This is why comparing the entire plan is more useful than focusing on a single monthly premium.
$0 Premium Stand-Alone Plans Are Changing
Another major development concerns beneficiaries who previously had access to stand-alone Part D plans with no monthly premium.
For 2027, there will be no $0-premium stand-alone Part D plans for beneficiaries who do not receive low-income subsidies.
Millions of people who had no monthly premium under their 2026 stand-alone drug plan could therefore face a new monthly charge in 2027.
The exact amount will depend on the plans available in each beneficiary’s area.
People who currently pay $0 should pay particular attention to their 2027 plan information. A plan can remain available while changing from a $0 premium to a paid premium, or a beneficiary may need to choose another plan to find a lower-cost alternative.
Why the Ending of the Part D Premium Stabilization Program Matters
The 2027 Part D market is also being affected by the end of the temporary Part D Premium Stabilization Demonstration.
The program had provided additional support intended to limit premium increases for certain stand-alone prescription drug plans.
For 2027, that temporary stabilization arrangement is no longer continuing. Federal officials have said the Part D market is returning to more normal conditions.
The end of the program does not mean that all Part D premiums will suddenly rise. In fact, the national average premium is projected to remain relatively stable.
However, removing the previous premium protections gives insurers more room to adjust individual plan premiums based on their expected costs and other market factors.
That helps explain why national averages can look stable while some beneficiaries see much larger changes.
Your Prescription List Is More Important Than the Premium
A common mistake during Medicare enrollment is choosing a plan based primarily on its monthly premium.
That approach can result in higher total costs.
Someone who takes only one inexpensive generic drug may benefit from a very low-premium plan. But a beneficiary taking several brand-name or specialty medications needs to consider the complete cost of coverage.
Before selecting a 2027 plan, beneficiaries should check whether every prescription they use is covered and determine where each drug falls on the plan’s formulary.
A medication placed on a preferred tier could cost substantially less than the same medication placed on a higher tier under another plan.
The plan’s rules should also be reviewed for prior authorization, quantity limits and step therapy.
Pharmacy Choice Can Make a Major Difference
The pharmacy network associated with a Part D plan can affect prescription costs just as much as the plan’s premium.
Some insurers offer preferred pharmacies where covered medications can cost less. A beneficiary who regularly fills prescriptions at a particular pharmacy should therefore verify whether that pharmacy is considered preferred, standard in-network or out of network under the plan being considered.
Mail-order options may also be available for certain prescriptions.
When comparing plans, beneficiaries should enter their preferred pharmacies into Medicare’s plan comparison system whenever possible. The estimated annual cost can then provide a more realistic picture than looking at the monthly premium alone.
What Beneficiaries Should Look for in the Annual Notice of Change
People already enrolled in Medicare prescription drug coverage receive an Annual Notice of Change, commonly known as an ANOC.
This document outlines changes that will apply to the plan during the following year.
Beneficiaries should look for changes involving:
- Monthly premiums
- Deductibles
- Prescription copayments
- Coinsurance
- Drug formularies
- Drug tiers
- Pharmacy networks
- Prior authorization
- Quantity limits
- Step therapy
- Other coverage restrictions
A medication that was inexpensive in 2026 could cost more in 2027 because of a tier change. Likewise, a pharmacy that offered preferred pricing could have a different status under the new plan year.
Reading the ANOC can help beneficiaries identify changes before they become unexpected expenses.
How to Compare Medicare Part D Plans for 2027
The best comparison starts with a current medication list.
Write down each prescription, including the exact drug name, dosage and frequency. Then identify the pharmacies you normally use.
Next, review the plans available in your ZIP code and compare their estimated yearly costs.
When reviewing the results, consider:
Monthly premium: How much will the plan charge every month?
Deductible: How much will you pay before applicable coverage begins?
Drug costs: What will your medications cost throughout the year?
Formulary: Are all your prescriptions covered?
Drug tiers: Are your medicines placed on affordable tiers?
Pharmacy network: Can you use your preferred pharmacy at favorable rates?
Coverage restrictions: Will prior authorization or step therapy be required?
Annual out-of-pocket exposure: How much could you potentially spend on covered prescriptions?
This approach provides a much clearer picture of the value of a plan.
Extra Help Could Lower Prescription Costs
Beneficiaries with limited income and resources may qualify for Medicare’s Extra Help program.
Extra Help is designed to reduce certain prescription drug costs for eligible individuals. Depending on eligibility, assistance can reduce premiums, deductibles and prescription copayments.
People whose income or financial circumstances have changed should check whether they qualify rather than assuming they are ineligible.
Beneficiaries who receive certain other forms of Medicare or Medicaid assistance may also have additional protections.
Part D and Medicare Advantage Drug Coverage Are Different
Not everyone with Medicare prescription coverage is enrolled in a stand-alone Part D plan.
People with Original Medicare can purchase stand-alone Part D coverage. People who enroll in Medicare Advantage may receive prescription drug coverage through their Medicare Advantage plan.
This distinction matters because changes to stand-alone Part D premiums do not necessarily affect people who receive drug coverage through Medicare Advantage.
For 2027, federal officials project that the average prescription drug premium associated with Medicare Advantage plans will be lower than the average stand-alone Part D premium.
Beneficiaries should therefore compare the complete Medicare coverage package that applies to them instead of comparing only stand-alone prescription premiums.
When Is Medicare Open Enrollment for 2027?
The Medicare Annual Enrollment Period runs from October 15 through December 7, 2026.
This is the key period for beneficiaries to review their coverage and make changes for 2027.
People should begin reviewing their options as soon as the 2027 plan information is available. Waiting until the deadline can make it easier to overlook a formulary change, pharmacy issue or premium increase.
Coverage changes made during the enrollment period generally become effective January 1, 2027.
Beneficiaries with certain qualifying circumstances may have access to Special Enrollment Periods outside the standard annual window.
What Happens If You Keep Your Current Plan?
A beneficiary may be automatically renewed in an existing plan when that plan continues to be offered.
But automatic renewal should not be confused with unchanged coverage.
The plan’s 2027 premium, deductible, drug list, pharmacy network and cost-sharing can all be different.
A plan that was affordable in 2026 may therefore become less attractive in 2027.
For that reason, doing nothing can still be a decision with financial consequences.
The Bottom Line for 2027
The latest Medicare data points to a relatively stable national average for stand-alone Part D premiums, but that does not mean every beneficiary will have a similar experience.
The average premium is projected at about $36 per month, while the standard deductible rises to $700 and the annual Part D out-of-pocket threshold reaches $2,400.
At the same time, beneficiaries will have fewer stand-alone plan choices in many areas, and some people could experience substantial premium increases if they stay with their existing coverage.
The most important step is to compare the medications, pharmacies and total estimated annual costs associated with each available plan. A low monthly premium may not result in the lowest yearly expenses, while a slightly more expensive plan could provide better coverage for a person’s specific prescriptions.
Medicare beneficiaries should use the 2027 enrollment period to review their current coverage carefully and make sure their prescription plan still fits their medical needs and household budget.
Are you comparing your prescription coverage for 2027? Share your Medicare questions or experiences below and keep checking for the latest Medicare updates.