When does catastrophic coverage begin in Part D?

• A. After TrOOP is met
• B. After deductible is met
• C. At plan enrollment
• D. Never

Answer: (B)

Catastrophic coverage in Medicare Part D begins once your total out-of-pocket costs for covered drugs reach a yearly threshold called TrOOP. TrOOP includes what you pay toward the deductible plus any copays and coinsurance for covered drugs, though monthly plan premiums don’t count toward it. When you hit that threshold, you pay only a small copay or coinsurance for the rest of the year and the plan covers the majority of subsequent drug costs.

This question’s framing is often recalled as “after the deductible is met” because the deductible is the first milestone that contributes toward reaching TrOOP, signaling the transition toward catastrophic protection. It’s not about enrolling or never happening; it’s about hitting the out-of-pocket threshold for the year.