Costs
Catastrophic Coverage
Quick answer
Catastrophic Coverage is the final phase of Part D. Once your out-of-pocket drug spending reaches the annual cap, you pay $0 for covered drugs for the rest of the calendar year.
Plain-English definition
This phase kicks in automatically once the plan's tracking shows you've hit the yearly cap.
Why it matters
It's the reason no one on Part D should face unlimited drug costs.
A simple example
You hit the cap in August after months of specialty drug spending. Covered drugs are $0 from that point through December.
Common mistakes & misconceptions
Related terms
Medicare Part D
Medicare Part D is prescription drug coverage sold by private insurance companies approved by Medicare. You get it either as a stand-alone drug plan (PDP) with Original Medicare or bundled inside most Medicare Advantage plans.
Donut Hole
The 'donut hole' was a coverage gap in Part D drug plans where beneficiaries paid a higher share of drug costs after early-year spending. The Inflation Reduction Act effectively closed it starting in 2025 with a hard annual out-of-pocket cap.
Coverage Gap
The Coverage Gap was the middle phase of the old Part D benefit structure — historically called the donut hole. It has been replaced by a single annual out-of-pocket cap under the Inflation Reduction Act.
Frequently asked questions
Does the cap reset each year?+
Yes, on January 1.
Sources & references
📚 Where this information comes from
- Medicare.gov — official U.S. government site for people with Medicare ↗Primary source for benefits, enrollment periods, and plan comparison.
- CMS.gov — Centers for Medicare & Medicaid Services ↗Federal rulemaking, program updates, and official guidance.
- Social Security Administration — Medicare enrollment & premiums ↗Enrollment, premium withholding, and IRMAA determinations.
When you're ready, compare plans on your own terms
See Medicare Advantage plans from the insurance companies we represent, or walk the course with a licensed agent whenever you'd like a second set of eyes.
We help compare Medicare Advantage plans from the insurance companies we represent, and we don't offer every plan available in your area.
Medicare Caddies is an independent insurance agency. We are not affiliated with, endorsed by, or connected to the U.S. government, the federal Medicare program, or the Centers for Medicare & Medicaid Services (CMS). We help compare Medicare Advantage plans from the insurance companies we represent, and we don't offer every plan available in your area.