Cosibelimab: Medicare Part D coverage

Tier, prior authorization (PA), step therapy (ST) and quantity limits (QL) for each Medicare Part D plan, from CMS public formulary files (2026Q3). Runs in your browser; nothing you enter is sent or stored.

No Part D formulary in the CMS files lists Cosibelimab. It may be covered under Part B, excluded, or listed under a product ClinDose does not match.

Plans in a state

Medicare Advantage plans are listed for every county they serve in the state; check the plan's service area for a specific county.

Enter a ZIP code or choose a state.

Source: CMS quarterly Part D formulary files, 2026Q3; 5,496 plans. Formularies change during the year; confirm with the plan before acting. Excluded drugs covered by enhanced plans and indication-based coverage are not shown.

For licensed clinicians. Use with clinical judgment.