Medicare

Catastrophic Coverage Phase

Once a Part D enrollee spends $2,100 out-of-pocket on covered drugs in 2026, they enter the catastrophic phase and pay nothing for the rest of the year.

Last reviewed: May 2026 · Editorial methodology

Definition

The catastrophic coverage phase is the final stage of the Medicare Part D prescription drug benefit structure, activated once a beneficiary's qualifying out-of-pocket drug spending reaches the annual threshold — $2,100 in 2026 under reforms made by the Inflation Reduction Act. Prior to the IRA, the catastrophic phase still required beneficiaries to pay 5% coinsurance. Beginning in 2025, once the catastrophic threshold is reached, beneficiaries pay $0 cost-sharing for all covered Part D drugs for the remainder of the calendar year. The $2,100 threshold counts only certain out-of-pocket payments — what the beneficiary actually paid, plus any amounts paid by Extra Help on their behalf. Amounts paid by secondary insurance, drug manufacturer coupons (in most cases), or the plan itself do not count. The transition into the catastrophic phase resets each January 1, so spending accumulated in one year does not carry over to the next. The Medicare Prescription Payment Plan (M3P) can help beneficiaries smooth payments throughout the year so costs are more evenly distributed before reaching the catastrophic threshold.

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Tip

Glossary definitions are educational. Always check your own policy language — insurers can define common terms differently from one another. When in doubt, request a written explanation from your agent.

Related terms

Medicare Part DMedicare Part D covers prescription drugs and features a $2,100 out-of-pocket cap in 2026, ending the coverage gap that previously left beneficiaries with full costs.Donut Hole (Part D Coverage Gap)The Part D coverage gap (donut hole) was effectively closed by the Inflation Reduction Act, which capped out-of-pocket drug costs at $2,000 in 2025, rising to $2,100 in 2026.Extra Help (Low-Income Subsidy)Extra Help (also called the Low-Income Subsidy or LIS) dramatically lowers prescription drug costs for Medicare beneficiaries with limited income and resources.Medicare Prescription Payment Plan (M3P)The M3P program, launched in 2025, smooths Part D drug costs throughout the year so beneficiaries are not hit with large out-of-pocket payments early in the year.MAPD (Medicare Advantage Prescription Drug)MAPD plans combine the hospital, medical, and drug benefits of Medicare Parts A, B, and D into one integrated plan from a private insurer.

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Source: Cover Forge USA editorial team|Last verified: May 2026|Methodology
Definitions are educational and may be simplified. Always refer to your policy contract and consult a licensed agent for terms that affect coverage decisions.
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Cover Forge USA Editorial Team

Editorial Lead

This article was researched and written by the Cover Forge USA editorial team against federal sources (NAIC, CMS, FEMA, DOL, SSA, state DOIs) and standard policy forms. Bylines organize content by topic — they do not assert individual licensure. See our editorial-policy for details.

Reviewed June 2026

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