piperacillin 2000 MG / tazobactam 250 MG Injection [Zosyn]
piperacillin
RxCUI: 1659134
What the CMS Formulary Data Shows for piperacillin 2000 MG / tazobactam 250 MG Injection [Zosyn]
Per the CMS 2026 Part D formulary file, piperacillin 2000 MG / tazobactam 250 MG Injection [Zosyn] (RxNorm concept RXCUI 1659134, generic name piperacillin) appears on 35 distinct formulary files spanning 408 Medicare Part D plan offerings - 8.1% of enrollable Part D products, selective placement; verify formulary inclusion before enrolling. Tier placement ranges from Tier 1 to Tier 4, with a cross-plan average of Tier 3.4.
Real-world access to piperacillin 2000 MG / tazobactam 250 MG Injection [Zosyn] depends on utilization management as much as tier placement: 0% of covering formularies require prior authorization. 0% require step therapy. 0% apply quantity limits.
Historical spending context from the CMS Medicare Part D Drug Spending Dashboard shows 22,422 Part D beneficiaries filled piperacillin 2000 MG / tazobactam 250 MG Injection [Zosyn] in 2023, with total plan-and-beneficiary spending of $14,199,661 and an average per-beneficiary annual cost of $633.29. The plan-by-plan detail below lists exactly which PDP and MA-PD contracts carry piperacillin 2000 MG / tazobactam 250 MG Injection [Zosyn] today.
Coverage Details
- Formularies covering
- 35
- Plans covering
- 408
- Coverage rate
- 8.1%
- Tier range
- Tier 1 – Tier 4
- Average tier
- Tier 3, Preferred Brand
Restrictions
- Prior authorization required
- 0% of formularies
- Step therapy required
- 0% of formularies
- Quantity limits
- 0% of formularies
2023 Medicare Spending
- Beneficiaries
- 22,422
- Total spending
- $14,199,661
- Avg per beneficiary
- $633.29
Tier Distribution Across Plans
Medicare Advantage Plans (MA-PD) Covering piperacillin 2000 MG / tazobactam 250 MG Injection [Zosyn]
100 Medicare Advantage plans with Part D drug coverage include this drug.
Frequently Asked Questions
Is piperacillin 2000 MG / tazobactam 250 MG Injection [Zosyn] covered by Medicare Part D?
Yes, piperacillin 2000 MG / tazobactam 250 MG Injection [Zosyn] is covered by 408 Medicare Part D plans (8.1% of all Part D formularies).
What tier is piperacillin 2000 MG / tazobactam 250 MG Injection [Zosyn] on Medicare Part D plans?
piperacillin 2000 MG / tazobactam 250 MG Injection [Zosyn] averages Tier 3.4 across Part D plans, ranging from Tier 1 to Tier 4.
Does piperacillin 2000 MG / tazobactam 250 MG Injection [Zosyn] require prior authorization?
0% of Part D formularies require prior authorization for piperacillin 2000 MG / tazobactam 250 MG Injection [Zosyn]. Step therapy: 0%. Quantity limits: 0%.
How much does Medicare spend on piperacillin 2000 MG / tazobactam 250 MG Injection [Zosyn]?
In 2023, total Medicare Part D spending on piperacillin 2000 MG / tazobactam 250 MG Injection [Zosyn] was $14,199,661, covering 22,422 beneficiaries. The average spend per beneficiary was $633.29.
Read our methodology - how this data is sourced, computed, and verified.