Quick Takeaway
If you remember Medicare Part D’s infamous:
“Donut hole,”
there’s an important update.
The traditional Part D coverage gap no longer exists.
The old coverage-gap phase was eliminated beginning in 2025 as part of the Inflation Reduction Act’s redesign of Medicare Part D. In 2026, the standard Part D benefit has three main stages:
Deductible → Initial Coverage → Catastrophic Coverage.
And there is another major number Medicare beneficiaries should know:
$2,100
That’s the 2026 annual out-of-pocket threshold for covered Part D prescription drugs. Once your qualifying out-of-pocket spending reaches that threshold, you enter catastrophic coverage and owe $0 in cost sharing for covered Part D drugs for the remainder of the calendar year.
The 2026 standard Part D deductible is:
$615
although individual plans can charge a lower deductible—or no deductible at all.
For people who take expensive medications, these changes fundamentally alter how prescription-drug expenses should be planned.
First: What Was the Medicare Part D Donut Hole?
For years, Medicare Part D had several coverage phases.
Beneficiaries could move from:
Deductible
to:
Initial Coverage
then into:
Coverage Gap
and eventually:
Catastrophic Coverage.
That middle phase became popularly known as the:
Donut Hole.
Historically, entering the coverage gap could significantly change what beneficiaries paid for prescriptions.
It became one of the most recognizable—and confusing—features of Medicare Part D.
But today’s Part D structure is different.
The Donut Hole Was Eliminated in 2025
This is an important distinction for a 2026 article.
The donut hole didn’t disappear for the first time in 2026.
CMS confirms that the coverage-gap phase was eliminated in:
2025.
The 2026 benefit continues that redesigned structure.
So rather than four traditional phases, the standard Part D benefit now essentially has:
1. Deductible
2. Initial Coverage
3. Catastrophic Coverage
That’s much easier for beneficiaries to understand.
What’s New for 2026?
The major annual change is the out-of-pocket threshold.
In 2025, the Part D annual out-of-pocket cap was:
$2,000.
For 2026, CMS increased the threshold to:
$2,100.
CMS explains that the increase reflects the statutory annual adjustment based on changes in average expenditures for covered Part D drugs.
So the protection remains—but the dollar amount increased by:
$100.
Medicare Part D in 2026 at a Glance
| Part D Feature | 2026 |
|---|---|
| Maximum standard deductible | $615 |
| Initial standard coinsurance | 25% |
| Annual out-of-pocket threshold | $2,100 |
| Cost sharing after reaching threshold | $0 for covered Part D drugs |
| Traditional coverage gap / donut hole | Eliminated |
CMS confirms both the $615 deductible and $2,100 out-of-pocket threshold for the defined standard 2026 Part D benefit.
Individual plans can structure benefits differently while satisfying Medicare requirements.
Stage 1: The Deductible
Let’s start at the beginning of the year.
Under the defined standard Part D benefit, the 2026 deductible is:
$615.
During the deductible stage, you generally pay the cost of your covered prescriptions until the deductible is satisfied.
However:
Your specific plan may have a lower deductible.
Some plans have:
$0 deductibles.
Medicare confirms that no Medicare drug plan may charge more than $615 for its deductible in 2026.
Not Every Drug Necessarily Faces the Full Deductible
Plan design matters.
A Part D plan could potentially provide coverage for certain drug tiers before the full deductible is satisfied.
For example, a plan might offer low copays for certain generic medications while applying its deductible differently to other drugs.
That’s why you shouldn’t choose a Part D plan simply by looking at:
deductible size.
You need to enter your actual prescriptions into Medicare’s Plan Compare tool and evaluate the plan’s formulary and estimated annual costs.
Stage 2: Initial Coverage
Once the applicable deductible is satisfied, you enter:
Initial Coverage.
Under the defined standard benefit, the beneficiary generally pays:
25% coinsurance
for covered Part D drugs during this phase.
But actual Medicare drug plans may use:
Fixed copays
Coinsurance
Drug tiers
and other Medicare-compliant benefit structures.
So your pharmacy receipt won’t necessarily say:
exactly 25%.
Stage 3: Catastrophic Coverage
This is where the new Part D structure provides its strongest protection.
Once qualifying annual out-of-pocket spending reaches:
$2,100 in 2026
you enter catastrophic coverage.
Then:
You pay $0 for covered Part D drugs for the remainder of the calendar year.
Medicare’s official 2026 handbook confirms that after reaching the $2,100 threshold, beneficiaries owe no copayment or coinsurance for covered Part D prescriptions for the rest of the year.
Why the $2,100 Cap Matters
Consider someone taking several inexpensive generic medications.
They might never approach:
$2,100.
For that person, the cap may not materially affect annual spending.
Now consider someone taking an expensive medication for:
Cancer
Rheumatoid arthritis
Multiple sclerosis
Diabetes
or another serious condition.
Historically, beneficiaries taking very expensive prescriptions could face substantial ongoing Part D cost sharing.
The annual cap creates a much clearer limit on qualifying out-of-pocket Part D drug spending.
Example: An Expensive Specialty Medication
Imagine a Medicare beneficiary takes an expensive covered specialty medication.
Their prescription expenses push qualifying Part D out-of-pocket spending to:
$2,100
by May.
Under the 2026 rules, after reaching that threshold, they enter catastrophic coverage.
For the rest of the calendar year, their cost sharing for covered Part D drugs becomes:
$0.
That doesn’t mean the medication itself suddenly becomes free.
The remaining cost is allocated among the Part D plan, manufacturers where applicable and Medicare according to the redesigned benefit structure.
But the beneficiary no longer owes additional cost sharing for those covered Part D drugs.
Does the $2,100 Include Your Premium?
No.
This is one of the most important details to understand.
The:
$2,100
threshold refers to qualifying out-of-pocket spending associated with covered Part D prescriptions.
Your:
monthly Part D premium
is separate.
Medicare beneficiaries continue paying applicable plan premiums even after reaching the drug out-of-pocket threshold.
So $2,100 Isn’t Your Maximum Total Medicare Spending
Suppose your Part D premium is:
$50/month.
That’s:
$600 annually.
If you also reach the $2,100 Part D out-of-pocket threshold, your combined spending could already be:
$2,700
before considering other Medicare expenses.
And that’s only the drug side.
You may separately have costs involving:
Medicare Part B
Hospital care
Dental care
Vision
Medicare Advantage
or:
Medigap.
So don’t interpret the $2,100 limit as:
“My entire Medicare healthcare spending is capped at $2,100.”
It isn’t.
The Cap Applies to Covered Part D Drugs
Another crucial phrase is:
Covered Part D drugs.
Suppose you purchase a medication that your Part D plan doesn’t cover.
You shouldn’t automatically assume that expenditure will count toward the $2,100 threshold.
Formulary status therefore remains extremely important.
A low-premium plan that doesn’t appropriately cover your medications can still be a poor choice.
The Donut Hole Is Gone—but Formulary Rules Aren’t
Eliminating the coverage gap doesn’t eliminate:
Formularies
Drug tiers
Prior authorization
Step therapy
Quantity limits
or:
Pharmacy networks.
These rules can still affect:
whether your prescription is covered
and:
how much you pay.
The $2,100 cap makes covered-drug financial exposure more predictable, but it doesn’t turn Part D into unrestricted prescription coverage.
Medicare Drug Price Negotiation Also Arrived in 2026
There’s another major Medicare prescription-drug change happening simultaneously.
On:
January 1, 2026
negotiated prices for the first 10 drugs selected under Medicare’s Drug Price Negotiation Program took effect.
Medicare’s official 2026 guidance confirms that negotiated prices for the first group of Part D drugs became effective at the start of 2026.
This is separate from the:
$2,100 out-of-pocket cap.
But both reforms can affect what beneficiaries pay.
The First 10 Negotiated Drugs
The initial group includes widely used and expensive medications covering conditions such as:
Diabetes
Blood clots
Heart failure
Kidney disease
Arthritis
Psoriasis
Crohn’s disease
and:
Certain blood cancers.
For beneficiaries taking one of the selected drugs, the new negotiated prices can influence prescription costs in addition to the annual Part D cap.
Insulin Protection Continues in 2026
Insulin has its own important cost-sharing protection.
CMS says that beginning in 2026, beneficiary cost sharing for a month’s supply of each covered insulin product is capped at the lowest of:
$35
25% of the applicable Medicare-negotiated maximum fair price
or:
25% of the plan’s negotiated price.
That’s an important change from thinking of:
$35
as automatically being the amount every beneficiary pays.
For some covered insulin products, the applicable amount can potentially be:
lower.
Certain Vaccines Remain $0
Another Inflation Reduction Act benefit continues.
Medicare Part D beneficiaries continue to owe:
$0 cost sharing
for adult vaccines recommended by the Advisory Committee on Immunization Practices and covered under Part D.
Depending on eligibility, that can include vaccines protecting against diseases such as:
Shingles
and:
Tetanus/diphtheria/pertussis.
These vaccine benefits aren’t dependent on reaching the $2,100 threshold first.
The Medicare Prescription Payment Plan Continues
There’s another program that can help people with high prescription costs:
Medicare Prescription Payment Plan.
All Medicare prescription drug plans must offer this payment option.
The program lets participants spread eligible out-of-pocket Part D prescription costs across monthly payments during the calendar year rather than necessarily paying large amounts at the pharmacy all at once.
But there’s a critical distinction:
It doesn’t reduce your total drug cost.
It changes:
when you pay.
Medicare explicitly says the payment plan can help manage monthly expenses but doesn’t lower the total cost of your prescriptions.
Example: High Costs Early in the Year
Suppose you fill an expensive prescription in:
January.
Without payment smoothing, you might face substantial out-of-pocket costs immediately.
Using the Medicare Prescription Payment Plan could allow those eligible expenses to be spread across the remaining months of the calendar year.
That can help with:
cash flow.
But if your total qualifying Part D out-of-pocket responsibility reaches $2,100, participating in the payment program doesn’t make that annual cap smaller.
$2,100 Cap vs. Payment Plan
These are easy to confuse.
$2,100 Out-of-Pocket Cap
Limits qualifying annual Part D drug spending.
Medicare Prescription Payment Plan
Lets you spread your applicable prescription expenses across the year.
The first can:
reduce financial exposure.
The second can:
smooth cash flow.
They’re different protections.
Why “Donut Hole” Is Now an Outdated Shopping Metric
Years ago, consumers comparing Part D plans had to worry heavily about:
entering the coverage gap.
That’s no longer the right framework.
In 2026, focus instead on:
Annual premium
Deductible
Your medications
Formulary coverage
Drug tiers
Pharmacy network
Prior authorization
Estimated annual cost
and:
$2,100 out-of-pocket protection.
That’s a much more useful way to evaluate Part D today.
Don’t Choose a Plan Only Because the Premium Is $0 or Very Low
Imagine:
Plan A
Premium: $5/month
but your expensive medication sits on an unfavorable tier.
Plan B
Premium: $45/month
but provides better coverage for the prescriptions you actually take.
Plan B could potentially produce a lower:
total annual cost.
Always compare:
Premium + Prescription Costs
rather than premium alone.
Pharmacy Networks Still Matter
Your Part D plan may have:
Preferred pharmacies
Standard pharmacies
and possibly:
Out-of-network restrictions.
The same prescription can potentially cost different amounts depending on where it’s filled.
So when comparing plans, enter:
your actual pharmacy.
Then compare alternatives.
Mail-order options may also be worth evaluating.
What About Medicare Advantage?
Many Medicare Advantage plans include Part D prescription coverage.
These are commonly called:
MA-PD plans.
The $2,100 annual Part D out-of-pocket threshold applies to Medicare drug coverage in 2026, including applicable MA-PD coverage.
But don’t confuse the prescription-drug cap with your Medicare Advantage medical out-of-pocket maximum.
Those are:
separate concepts.
What About Extra Help?
Some beneficiaries qualify for:
Extra Help
with Medicare prescription costs.
People receiving Extra Help can have substantially different:
Deductibles
Copays
and:
Prescription costs.
Medicare’s 2026 handbook specifically notes that Extra Help beneficiaries won’t have some of the standard Part D costs discussed above.
If your income and resources are limited, investigate eligibility rather than assuming standard Part D prices apply to you.
Example: Three Medicare Beneficiaries
Robert — Low Drug Use
Robert takes two inexpensive generic prescriptions.
His annual drug spending is modest.
He may never approach:
$2,100.
For him, important comparison factors might include:
Premium
Generic copays
and:
Pharmacy network.
Susan — Moderate Drug Use
Susan takes several brand-name medications.
Her costs are meaningful but don’t reach the annual threshold.
For her, formulary tiers and coinsurance become extremely important.
Michael — Very High Drug Use
Michael takes an expensive specialty medication.
He reaches:
$2,100
in qualifying out-of-pocket spending relatively early in the year.
After reaching the threshold, his cost sharing for covered Part D prescriptions becomes:
$0 for the remainder of 2026.
For Michael, the redesigned catastrophic protection can be financially significant.
What Happens on January 1, 2027?
The Part D out-of-pocket threshold operates on a:
calendar-year basis.
That means the 2026 protection doesn’t simply continue accumulating indefinitely.
A new annual threshold applies in the next calendar year.
The statutory cap is indexed, so consumers should check Medicare’s published Part D parameters annually rather than assuming:
$2,100
will remain unchanged forever.
Why Annual Plan Shopping Still Matters
The existence of an out-of-pocket cap doesn’t eliminate the need to compare Part D plans.
Plans can change:
Premiums
Formularies
Drug tiers
Pharmacy networks
Prior-authorization requirements
and:
Cost sharing.
Your medications can change too.
So even if your current plan worked well in 2026, review it during the next Medicare Open Enrollment period.
Your 2026 Part D Checklist
Before choosing or renewing drug coverage:
- List every prescription you currently take.
- Record the exact dosage and frequency.
- Check whether each medication is on the plan’s formulary.
- Check the drug tier.
- Check prior-authorization requirements.
- Check step-therapy requirements.
- Review quantity limits.
- Compare preferred pharmacies.
- Compare mail-order pricing where appropriate.
- Check the monthly premium.
- Check the deductible.
- Remember the 2026 maximum standard deductible is $615.
- Understand the $2,100 annual out-of-pocket threshold.
- Remember the traditional donut hole is gone.
- Check whether you qualify for Extra Help.
- Review insulin cost-sharing rules if applicable.
- Remember qualifying Part D vaccines can have $0 cost sharing.
- Consider the Medicare Prescription Payment Plan if high early-year expenses would strain your budget.
- Compare total estimated annual costs rather than premiums alone.
- Recheck coverage every year.
Frequently Asked Questions
Is there still a Medicare Part D donut hole in 2026?
No. The traditional coverage-gap phase was eliminated beginning in 2025. The redesigned standard benefit now moves from deductible to initial coverage and then catastrophic coverage.
What is the Medicare Part D out-of-pocket cap for 2026?
The annual out-of-pocket threshold is:
$2,100.
What happens after I spend $2,100?
Once qualifying out-of-pocket spending reaches $2,100, you enter catastrophic coverage and pay $0 in cost sharing for covered Part D drugs for the remainder of 2026.
What is the Part D deductible in 2026?
The maximum deductible is $615. Some plans have a smaller deductible or no deductible.
Does my monthly Part D premium count toward the $2,100?
No. The annual out-of-pocket threshold concerns qualifying spending on covered Part D prescription drugs, not your monthly plan premium.
Is insulin still capped at $35?
For 2026, CMS says cost sharing for a month’s supply of a covered insulin product is capped at the lesser of $35, 25% of the applicable negotiated maximum fair price, or 25% of the plan’s negotiated price.
Does the Medicare Prescription Payment Plan reduce my drug costs?
No. It allows eligible costs to be spread across the calendar year but doesn’t itself lower the total amount you owe.
Do I need to enroll in the payment plan to get the $2,100 cap?
No. Medicare says the $2,100 out-of-pocket limit applies to everyone with Medicare drug coverage, regardless of whether they participate in the Medicare Prescription Payment Plan.
Final Thoughts
For years, the:
Medicare Part D donut hole
symbolized one of Medicare prescription coverage’s biggest financial uncertainties.
That’s no longer how Part D works.
The coverage-gap phase was eliminated in 2025, and in 2026 the redesigned standard benefit provides a much clearer progression:
Deductible → Initial Coverage → Catastrophic Coverage
with a:
$2,100 annual out-of-pocket threshold.
After reaching that threshold, beneficiaries owe $0 in cost sharing for covered Part D prescriptions for the rest of the calendar year.
That doesn’t make prescription insurance simple.
You still need to evaluate:
Formularies
Drug tiers
Pharmacy networks
Premiums
Prior authorization
and:
Plan-specific cost sharing.
But the redesigned system provides something beneficiaries taking expensive medications historically lacked:
a much clearer ceiling on annual covered Part D drug cost sharing.
For 2026, remember three numbers:
$615 — Maximum standard deductible
$2,100 — Annual out-of-pocket threshold
$0 — Cost sharing for covered Part D drugs after reaching that threshold
Those numbers are far more useful today than worrying about falling into the old: