Medicare Part D Coverage Gap: How to Minimize Costs
Medicare Part D coverage gap costs too high? Learn how the ACA largely closed the donut hole, Extra Help eligibility, state drug assistance programs, and appeal options.
The Medicare Part D "coverage gap" — often called the donut hole — was once a dreaded gap in prescription drug coverage that left seniors paying full drug prices for thousands of dollars worth of medications. The Affordable Care Act (ACA) gradually closed this gap, and the Inflation Reduction Act (IRA) of 2022 took additional steps to limit out-of-pocket drug costs. Here is where things stand and what options are available if drug costs are still unmanageable.
What Is the Medicare Part D Coverage Gap?
Medicare Part D drug coverage works in four phases:
Phase 1 — Deductible Phase You pay 100% of drug costs until you meet your plan's deductible (capped at a maximum set by CMS each year, around $590 in 2025 for standard plans).
Phase 2 — Initial Coverage Phase After meeting the deductible, you pay a copayment or coinsurance for covered drugs, and Medicare pays the rest — until the total drug spending reaches the initial coverage limit.
Phase 3 — Coverage Gap (Donut Hole) When total drug spending crosses the initial coverage limit, you historically entered the coverage gap. Before ACA reforms, patients paid a much larger share of drug costs in this phase.
Phase 4 — Catastrophic Coverage Once your true out-of-pocket costs (TrOOP) reach the catastrophic threshold, Medicare takes over and pays the vast majority of costs for the rest of the year.
How the ACA and IRA Closed the Gap
The ACA phased in discounts in the coverage gap, requiring drug manufacturers to provide substantial discounts on brand-name drugs when beneficiaries enter the gap. The Inflation Reduction Act of 2022 went further:
- $2,000 annual out-of-pocket cap: Effective 2025, Medicare Part D beneficiaries have a $2,000 annual cap on out-of-pocket drug costs. Once you reach $2,000 in true out-of-pocket spending, Medicare covers 100% of drug costs for the rest of the year.
- Medicare Drug Price Negotiation: CMS began negotiating prices directly with manufacturers for high-cost drugs, reducing costs for certain medications
- Smoothing payments: Beneficiaries can now spread their out-of-pocket costs throughout the year rather than hitting the cap all at once
These are significant protections, but drug costs can still be burdensome before reaching the cap.
Low-Income Subsidy (Extra Help): If You Qualify, Apply
The Low-Income Subsidy (LIS), also called Extra Help, is a federal program that helps people with limited income and resources pay for Part D costs — premiums, deductibles, and cost-sharing.
If you qualify for Extra Help, you will pay significantly reduced Part D costs (often just a few dollars per prescription). Extra Help is based on income and resources — you do not need to be on Medicaid to qualify.
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How to apply: Apply through Social Security at ssa.gov/extrahelp or call 1-800-772-1213. Medicare automatically enrolls you in Extra Help if you qualify for full Medicaid, SSI, or certain Medicare Savings Programs.
If you were denied Extra Help or believe you should qualify, you can appeal the Social Security denial through SSA's standard appeal process.
State Pharmaceutical Assistance Programs (SPAPs)
Many states offer State Pharmaceutical Assistance Programs (SPAPs) that supplement Medicare Part D coverage — providing additional help with premiums, cost-sharing, or coverage for specific drugs. SPAP availability and eligibility varies significantly by state.
States with notable SPAPs include New Jersey (PAAD program), New York (EPIC program), Pennsylvania (PACE/PACENET), Delaware, Connecticut, and others. Contact your state's aging services office or SHIP counselor for information about programs available where you live.
Manufacturer Patient Assistance Programs
Many pharmaceutical manufacturers offer patient assistance programs (PAPs) that provide free or reduced-cost medications to eligible patients, including Medicare beneficiaries. Eligibility criteria vary, but many programs are available to beneficiaries who do not qualify for Extra Help.
Your physician's office, hospital social worker, or SHIP counselor can help identify manufacturer assistance programs for your specific medications. The NeedyMeds database (needymeds.org) is a useful starting point.
What If You Believe Your Cost-Sharing Is Wrong?
If you believe you are being charged an incorrect amount — for example, you should be receiving Extra Help cost-sharing rates but are being charged the regular rate — you can appeal. File a coverage determination request with your Part D plan asking them to correct the cost-sharing calculation.
If the plan disagrees, escalate through the standard Part D appeal process (redetermination, IRE, OMHA, MAC, federal court).
SHIP Counselors: Free Drug Cost Help
SHIP counselors (shiphelp.org) are trained to help Medicare beneficiaries navigate Part D costs, identify Extra Help eligibility, find SPAPs, and appeal cost-sharing errors. This is a free service available to every Medicare beneficiary.
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