The Medicare Part D "donut hole" — formally called the coverage gap — was a phase in which your drug plan stopped paying its usual share of prescription costs, leaving you to cover a much larger portion yourself. As of January 1, 2025, it no longer exists.
Here is what that means for you right now:
- Part D now has three phases, not four: deductible, initial coverage, and catastrophic coverage. The coverage gap phase is gone.
- An out-of-pocket cap now triggers catastrophic coverage. Once your qualifying drug spending hits the threshold, your cost-sharing drops sharply or disappears entirely.
- Verify your specific plan's details at Medicare or by calling 1-800-MEDICARE, since formularies and cost-sharing vary by plan.
Key Takeaways
The Medicare Part D donut hole was eliminated effective January 1, 2025, leaving a simpler three-phase structure where a $2,100 out-of-pocket threshold triggers catastrophic coverage in 2026.
| Point | Details |
|---|---|
| Donut hole eliminated | The coverage gap phase ended December 31, 2024; Part D now has three phases. |
| Three phases remain | Deductible (max $615 in 2026), initial coverage, and catastrophic coverage. |
| OOP threshold matters | Spending on covered Part D drugs counts toward the $2,100 catastrophic threshold. |
| Formulary determines coverage | Drugs not on your plan's formulary do not count toward your out-of-pocket cap. |
| Verify current figures | Dollar thresholds update annually; always check Medicare.gov for the current amounts. |
Table of Contents
- What is the Medicare donut hole, and why did it exist?
- How the Inflation Reduction Act removed the coverage gap
- How Medicare Part D is structured today
- What actually counts toward your out-of-pocket total?
- What the change means for your situation
- Practical next steps to check your coverage now
- A note from Familyguardlh
- Sources
What is the Medicare donut hole, and why did it exist?
The coverage gap was baked into the original 2006 design of Medicare Part D. Congress created Part D to add prescription drug coverage to Medicare, but to control costs, the law built in a phase where plan payments paused after initial coverage reached a spending ceiling. Beneficiaries fell into that gap — the donut hole — and paid a much higher share of drug costs until their spending reached a catastrophic threshold.
The four-phase structure that existed before 2025 worked like this:
- Deductible phase: You paid 100% of drug costs until you met your plan's annual deductible.
- Initial coverage phase: Your plan and you shared costs (copays or coinsurance) until combined spending hit a set ceiling.
- Coverage gap (donut hole): Plan payments paused. You paid a larger share of costs for both brand-name and generic drugs.
- Catastrophic coverage: After your out-of-pocket spending crossed a threshold, your cost-sharing dropped to very low or zero amounts.
One confusion worth clearing up: the donut hole was never the same as your deductible or your normal initial-coverage copays. Those were separate phases. The gap was a distinct middle zone where the rules changed abruptly. Many beneficiaries experienced it as a sudden spike in their monthly drug bills, often mid-year, which is why the term stuck in conversation long after policy changes began shrinking it.
The Affordable Care Act started closing the gap in 2010, gradually reducing what beneficiaries paid inside it each year. The Coverage Gap Discount Program, administered by CMS, required drug manufacturers to provide discounts on brand-name drugs during the gap years, which counted toward beneficiaries' out-of-pocket totals. That program was part of the bridge between the original donut hole design and the eventual elimination.
How the Inflation Reduction Act removed the coverage gap
The Inflation Reduction Act of 2022 set the elimination in motion. It restructured Part D in stages, with the coverage gap officially ending on December 31, 2024. Starting January 1, 2025, the gap phase no longer exists in any Medicare Part D plan.
Key milestones in the phase-down:
- 2006: Part D launched with the four-phase structure, including the coverage gap.
- 2010: The ACA began gradually reducing what beneficiaries paid inside the gap.
- 2011: The Coverage Gap Discount Program took effect, requiring manufacturer discounts on brand-name drugs in the gap.
- 2020: The ACA's phase-down reached its target: beneficiaries paid 25% for both brand-name and generic drugs in the gap.
- 2025: The Inflation Reduction Act eliminated the gap phase entirely, as confirmed by Medicare Interactive.
To confirm current rules and dollar thresholds, go directly to Medicare.gov or CMS.gov rather than relying on older plan documents or memory. Dollar figures update annually, and a threshold that applied two years ago may not apply today.
How Medicare Part D is structured today
With the gap gone, Part D has three phases. Understanding them helps you predict where your costs will land across the year.
- Deductible phase: You pay 100% of covered drug costs until you meet your plan's deductible. Not all plans charge a deductible, and for 2026, Medicare.gov states the maximum deductible any plan may charge is capped.
- Initial coverage phase: Once your deductible is met, you and your plan share costs through copays or coinsurance. This phase continues until your qualifying out-of-pocket spending reaches the catastrophic threshold.
- Catastrophic coverage phase: After your out-of-pocket spending hits $2,100 (the 2026 threshold per Medicare.gov), catastrophic coverage kicks in and your cost-sharing drops significantly.
| 2026 Part D Reference Figure | Amount |
|---|---|
| Maximum deductible allowed | capped amount |
| Out-of-pocket threshold for catastrophic coverage | current threshold |
These figures come directly from Medicare.gov and apply to standard Part D plans. Individual plans may set a lower deductible or offer enhanced benefits, but none may exceed the $615 deductible cap.
Formularies and drug tiers matter enormously here. Each plan publishes its own list of covered drugs, organized into tiers that carry different cost-sharing levels. A drug on Tier 1 (usually generics) costs far less than one on Tier 4 or Tier 5 (specialty drugs). Critically, how drug plans work means that a drug not on your plan's formulary typically does not count toward your out-of-pocket cap at all.
What actually counts toward your out-of-pocket total?
This is where many beneficiaries get tripped up. Not every dollar you spend on prescriptions moves you toward catastrophic coverage.
Payments that generally count toward your Part D out-of-pocket threshold:
- Your copays and coinsurance for covered drugs on your plan's formulary
- Amounts paid on your behalf through Extra Help (the Low Income Subsidy program)
- Manufacturer discounts on covered brand-name drugs, where applicable under current rules
Payments that generally do not count:
- Spending on drugs not covered by your plan's formulary
- Premiums you pay for your Part D plan
- Costs for drugs purchased outside the Part D benefit (such as over-the-counter medications)
The key phrase throughout is "covered Part D drugs." Only spending on drugs your plan actually covers moves the needle toward catastrophic coverage. If you take an expensive specialty drug that your plan does not cover, that spending stays outside the calculation entirely.
Pro Tip: Check your plan's Evidence of Coverage document — mailed each fall — for the exact list of what counts toward your out-of-pocket total. If anything is unclear, call your plan's customer service line directly. You can also use the Medicare Plan Finder at Medicare.gov to compare how different plans treat your specific medications.
For current dollar thresholds, always go to Medicare.gov's Part D costs page rather than relying on figures from prior years. Annual updates can shift these numbers.
What the change means for your situation
The practical impact of eliminating the donut hole varies depending on how many prescriptions you take and what they cost.
- If you take one or two low-cost generics: You likely never fell into the coverage gap to begin with. The elimination changes little for you day-to-day, though the simplified three-phase structure makes your cost trajectory easier to predict.
- If you take several maintenance medications: You may have hit the gap mid-year in prior years and seen your costs spike. That spike is gone. Your cost-sharing now stays consistent through the initial coverage phase until you hit the catastrophic threshold.
- If you take a high-cost specialty or biologic drug: This is where the change matters most. Previously, beneficiaries on expensive drugs could exhaust initial coverage quickly and face very high gap-phase costs. Now, once your out-of-pocket spending reaches $2,100, catastrophic coverage applies and your costs drop sharply.
Avoid relying on dollar estimates from friends or older plan documents. Drug costs vary by plan, pharmacy, and tier placement.
Pro Tip: Build a simple medication list — drug name, dose, and frequency — and run it through the Medicare Plan Finder at Medicare.gov. The tool shows estimated annual costs for each plan based on your actual drugs, which is far more accurate than any general estimate.
Practical next steps to check your coverage now
Knowing the donut hole is gone is useful for projecting your annual prescription expenses. Knowing exactly what your plan covers and costs is what actually protects your budget.
- Gather your medication list. Write down every prescription drug, its dose, and how often you take it.
- Use the Medicare Plan Finder at Medicare.gov to compare plans based on your specific drugs, preferred pharmacy, and zip code.
- Check each plan's formulary. Confirm your drugs are covered and note their tier placement — tier determines your cost-sharing level.
- Verify your preferred pharmacy is in-network. Using a preferred or in-network pharmacy can significantly reduce what you pay per fill.
- Call 1-800-MEDICARE (1-800-633-4227, TTY: 1-877-486-2048) for free, personalized help from a Medicare representative.
- Contact your State Health Insurance Assistance Program (SHIP). SHIP counselors provide free, unbiased help comparing plans. Find your state's SHIP at shiphelp.org.
Pro Tip: The Medicare Annual Enrollment Period runs October 15 through December 7 each year. That is your primary window to switch Part D plans. Changes take effect January 1. Verify current enrollment deadlines on Medicare.gov before acting — missing the window means waiting another year.
A note from Familyguardlh
Working with Medicare beneficiaries across 22 states, the most common frustration I hear is that Part D feels impossible to decode without a guide. The elimination of the donut hole genuinely simplifies things, but plan-level differences in formularies, tiers, and pharmacy networks still create real variation in what you'll pay.
At Familyguardlh, we help beneficiaries compare Medicare supplement and Part D options side by side, so you can see exactly what a plan costs for your specific medications before you commit. We are licensed in AZ, CO, FL, GA, IA, IN, MA, MD, ME, MI, MS, MT, NC, NV, OH, OK, PA, SC, TN, TX, VA, and WA. Always verify plan-specific details directly on Medicare.gov, and if you want a licensed agent to walk you through your options, we are here for that conversation.
Sources
These are the primary sources to consult for current, authoritative information on Part D costs and coverage rules:
- How much does Medicare drug coverage cost? | Medicare
- The Medicare Part D Donut Hole: What You Need to Know
- Coverage Gap Discount Program | CMS
- The Part D donut hole - Medicare Interactive
This article is general information, not a substitute for advice from a qualified financial advisor. Consult a qualified financial professional about your own circumstances before acting on anything here.