Medicare Part D coverage · piperacillin · RxCUI 1659134
piperacillin 2000 MG / tazobactam 250 MG Injection [Zosyn]
Per the CMS 2026 Part D formulary file, piperacillin 2000 MG / tazobactam 250 MG Injection [Zosyn] is covered by 408 Medicare Part D plans (8.1% of enrollable products), averaging Tier 3.4, with prior authorization required on 0% of covering formularies.
- 8.1%
- Plan coverage
- 408
- Plans covering
- T3.4
- Avg tier
- 0%
- Prior auth required
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 $14,109,478 and an average per-beneficiary annual cost of $629.27. 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
- $14,109,478
- Avg per beneficiary
- $629.27
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.
Show the next 30 plans
| Anthem I CareMore Home Care (HMO I-SNP) | Blue Cross OF California | T4 | No | $0 | CA |
| Anthem I CareMore Chronic Care (HMO-POS C-SNP) | Blue Cross OF California | T4 | No | $0 | CA |
| Anthem I CareMore Lung Care (HMO-POS C-SNP) | Blue Cross OF California | T4 | No | $0 | CA |
| Anthem I CareMore Kidney Care (HMO-POS C-SNP) | Blue Cross OF California | T4 | No | $0 | CA |
| Anthem I CareMore Lung Care (HMO-POS C-SNP) | Blue Cross OF California | T4 | No | $0 | CA |
| Anthem I CareMore Kidney Care (HMO-POS C-SNP) | Blue Cross OF California | T4 | No | $0 | CA |
| Wellpoint Lung Care (HMO-POS C-SNP) | Wellpoint Health Plans, Inc. | T4 | No | $0 | AZ |
| Wellpoint Chronic Care (HMO-POS C-SNP) | Wellpoint Health Plans, Inc. | T4 | No | $0 | AZ |
| Wellpoint Medicare Advantage 1 (HMO-POS) | Wellpoint Health Plans, Inc. | T4 | No | $0 | AZ |
| Wellpoint Premium Savings (HMO) | Wellpoint Health Plans, Inc. | T4 | No | $0 | AZ |
| Wellpoint I CareMore Home Care (HMO I-SNP) | Wellpoint Health Plans, Inc. | T4 | No | $0 | AZ |
| Wellpoint I CareMore Home Care (HMO I-SNP) | Wellpoint Health Plans, Inc. | T4 | No | $0 | AZ |
| Wellpoint Medicare Advantage 2 (HMO-POS) | Wellpoint Texas, Inc. | T4 | No | $0 | AZ |
| Wellpoint I CareMore Home Care 2 (HMO I-SNP) | Wellpoint Texas, Inc. | T4 | No | $0 | AZ |
| Wellpoint Lung Care 2 (HMO-POS C-SNP) | Wellpoint Texas, Inc. | T4 | No | $0 | AZ |
| Wellpoint Chronic Care 2 (HMO-POS C-SNP) | Wellpoint Texas, Inc. | T4 | No | $0 | AZ |
| Wellpoint I CareMore Kidney Care (HMO-POS C-SNP) | Wellpoint Texas, Inc. | T4 | No | $0 | AZ |
| Anthem Chronic Care (HMO-POS C-SNP) | Healthkeepers, Inc. | T4 | No | $0 | VA |
| Anthem I CareMore Medicare Advantage (HMO-POS) | Blue Cross OF California Partnership Plan, Inc. | T4 | No | $0 | CA |
| Anthem I CareMore Premium Savings (HMO-POS) | Blue Cross OF California Partnership Plan, Inc. | T4 | No | $0 | CA |
| Anthem I CareMore Medicare Advantage (HMO-POS) | Blue Cross OF California Partnership Plan, Inc. | T4 | No | $0 | CA |
| Anthem I CareMore Chronic Care 2 (HMO-POS C-SNP) | Blue Cross OF California Partnership Plan, Inc. | T4 | No | $0 | CA |
| Anthem I CareMore Chronic Care 2 (HMO-POS C-SNP) | Blue Cross OF California Partnership Plan, Inc. | T4 | No | $0 | CA |
| Anthem I CareMore Lung Care 2 (HMO-POS C-SNP) | Blue Cross OF California Partnership Plan, Inc. | T4 | No | $0 | CA |
| Anthem I CareMore Lung Care 2 (HMO-POS C-SNP) | Blue Cross OF California Partnership Plan, Inc. | T4 | No | $0 | CA |
| Anthem I CareMore Medicare Advantage (HMO-POS) | HMO Colorado, Inc. | T4 | No | $0 | NV |
| Anthem I CareMore Lung Care (HMO-POS C-SNP) | HMO Colorado, Inc. | T4 | No | $0 | NV |
| Anthem I CareMore Chronic Care (HMO-POS C-SNP) | HMO Colorado, Inc. | T4 | No | $0 | NV |
| Anthem I CareMore Home Care (HMO I-SNP) | HMO Colorado, Inc. | T4 | No | $0 | NV |
| Anthem I CareMore Kidney Care (HMO-POS C-SNP) | HMO Colorado, Inc. | T4 | No | $0 | NV |
Showing top 50 of 100 plans.
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 $14,109,478, covering 22,422 beneficiaries. The average spend per beneficiary was $629.27.
Read our methodology - how this data is sourced, computed, and verified.
Nationwide similar Part D drugs
Data-derived peers across the CMS Part D formulary extract: nearest average tier placement and nearest prior-authorization rate. Not therapeutic alternatives or same-generic strengths.
Closest average formulary tier
- colistin 75 MG/ML Injectable Solution T3.4
- 4 ML penicillin G benzathine 600000 UNT/ML Prefilled Syringe [Bicillin L-A] T3.4
- 2 ML penicillin G benzathine 600000 UNT/ML Prefilled Syringe [Bicillin L-A] T3.4
- 24 HR tacrolimus 0.5 MG Extended Release Oral Capsule [Astagraf] T3.4
- 2 ML penicillin G benzathine 300000 UNT/ML / penicillin G procaine 300000 UNT/ML Prefilled Syringe [Bicillin] T3.4
- phenytoin 50 MG Chewable Tablet [Dilantin] T3.4