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Independent; not a government site. Official answers: Medicare.gov, 1-800-MEDICARE.

Is Zenpep (amylase / lipase / protease) covered by Medicare Part D?

4,748 of 5,052 Medicare Part D plan offerings (94%) list Zenpep on their 2026 formulary, most often on tier 3; 0.3% of the formularies that cover it require prior authorization. Part D spending on it was $597 million in 2024 for 58,375 people: what plans and patients paid at the pharmacy, before manufacturer rebates (CMS Part D Spending by Drug).

Plans that cover it
94%
4,748 of 5,052 offerings; the median drug: 76%
Usual tier
Tier 3
from tier 1 to tier 4
Prior authorization
0.3%
of formularies that cover it; the median drug: 1%
Quantity limits
0%
of formularies that cover it; the median drug: 30%

Source: CMS Part D formulary file, 2026 second quarter: the formularies in use in 2026. A plan's 2027 formulary can differ; check your own plan's coverage in Medicare Plan Finder.

What does it cost under Part D in 2027?

Your yearly cap in 2027
Out-of-pocket spending on covered Part D drugs stops at $2,400 in 2027 ($2,100 in 2026); after that, you pay nothing for covered drugs for the rest of the year.
The deductible
A plan's drug deductible is at most $700 in 2027 ($615 in 2026); many plans charge less or none.

Source: CMS, Announcement of calendar year 2027 Part D parameters; Medicare.gov, “How much does Medicare drug coverage cost?” (read Oct. 7, 2026).

How much does Medicare spend on it?

Part D spending by year

2021$143 million
2022$329 million
2023$443 million
2024 (latest)$597 million

58,375 people filled it under Part D in 2024, in 259,162 claims. The amounts are what plans and patients paid at the pharmacy, before manufacturer rebates.

Source: CMS Medicare Part D Spending by Drug, 2020 to 2024 (published June 2026). Row used: Zenpep (Lipase/Protease/Amylase).

Which forms and strengths are counted?

  • amylase 105000 units / lipase 25000 units / protease 79000 units delayed-release oral capsule
  • amylase 14000 units / lipase 3000 units / protease 10000 units delayed-release oral capsule
  • amylase 168000 units / lipase 40000 units / protease 126000 units delayed-release oral capsule
  • amylase 24000 units / lipase 5000 units / protease 17000 units delayed-release oral capsule
  • amylase 252600 units / lipase 60000 units / protease 189600 units delayed-release oral capsule
  • amylase 42000 units / lipase 10000 units / protease 32000 units delayed-release oral capsule
  • amylase 63000 units / lipase 15000 units / protease 47000 units delayed-release oral capsule
  • amylase 84000 units / lipase 20000 units / protease 63000 units delayed-release oral capsule

Which other versions are listed?

The same ingredients under other names, each with its own coverage and spending.

What else should you check?

Data, not medical advice. Coverage is the share of plan formularies listing the drug; your plan's formulary, tier and pharmacy decide what you pay.