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PlainMedicare

Is Steqeyma (ustekinumab-stba) covered by Medicare Part D?

1,715 of 5,052 Medicare Part D plan offerings (33.9%) list Steqeyma on their 2026 formulary, most often on tier 4; 100% of the formularies that cover it require prior authorization.

Plans that cover it
33.9%
1,715 of 5,052 offerings; the median drug: 76%
Usual tier
Tier 4
from tier 1 to tier 5
Prior authorization
100%
of formularies that cover it; the median drug: 1%
Quantity limits
97.7%
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).

Which forms and strengths are counted?

  • 0.5 ml ustekinumab-stba 90 mg/ml prefilled syringe
  • 1 ml ustekinumab-stba 90 mg/ml prefilled syringe

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.