Medicare Part D coverage · nafcillin · RxCUI 1721458
nafcillin 1000 MG Injection
Per the CMS 2026 Part D formulary file, nafcillin 1000 MG Injection is covered by 4,993 Medicare Part D plans (98.8% of enrollable products), averaging Tier 2.9, with prior authorization required on 9% of covering formularies.
- 98.8%
- Plan coverage
- 4,993
- Plans covering
- T2.9
- Avg tier
- 9%
- Prior auth required
What the CMS Formulary Data Shows for nafcillin 1000 MG Injection
Per the CMS 2026 Part D formulary file, nafcillin 1000 MG Injection (RxNorm concept RXCUI 1721458, generic name nafcillin) appears on 321 distinct formulary files spanning 4,993 Medicare Part D plan offerings - 98.8% of enrollable Part D products, near-universal placement. Tier placement ranges from Tier 1 to Tier 6, with a cross-plan average of Tier 2.9.
Real-world access to nafcillin 1000 MG Injection depends on utilization management as much as tier placement: 9% of covering formularies require prior authorization. 0% require step therapy. 0% apply quantity limits.
Medicare Part D spending dashboard figures are not published for this drug. The plan-by-plan detail below lists exactly which PDP and MA-PD contracts carry nafcillin 1000 MG Injection today.
Coverage Details
- Formularies covering
- 321
- Plans covering
- 4,993
- Coverage rate
- 98.8%
- Tier range
- Tier 1 – Tier 6
- Average tier
- Tier 3, Preferred Brand
Restrictions
- Prior authorization required
- 9% of formularies
- Step therapy required
- 0% of formularies
- Quantity limits
- 0% of formularies
Tier Distribution Across Plans
Medicare Advantage Plans (MA-PD) Covering nafcillin 1000 MG Injection
100 Medicare Advantage plans with Part D drug coverage include this drug.
| Plan | Insurer | Tier | PA | Premium | States |
|---|---|---|---|---|---|
| Sentara Community Complete Select (HMO D-SNP) | Sentara Health Plans | T1 | No | $0 | VA |
| Sentara Community Complete (HMO D-SNP) | Sentara Health Plans | T1 | No | $0 | VA |
| Freedom Medi-Medi Partial (HMO D-SNP) | Freedom Health, Inc. | T1 | No | $0 | FL |
| Freedom Medi-Medi Full (HMO D-SNP) | Freedom Health, Inc. | T1 | No | $0 | FL |
| Optimum Emerald Partial (HMO D-SNP) | Optimum Healthcare, Inc. | T1 | No | $0 | FL |
| Optimum Emerald Full (HMO D-SNP) | Optimum Healthcare, Inc. | T1 | No | $0 | FL |
| Freedom Medicare Plan Rx (HMO) | Freedom Health, Inc. | T1 | No | $0 | FL |
| Freedom Medicare Plan Rx (HMO) | Freedom Health, Inc. | T1 | No | $0 | FL |
| Freedom VIP Savings COPD (HMO C-SNP) | Freedom Health, Inc. | T1 | No | $0 | FL |
| Freedom VIP Savings COPD (HMO C-SNP) | Freedom Health, Inc. | T1 | No | $0 | FL |
| Freedom Platinum Plan Rx (HMO) | Freedom Health, Inc. | T1 | No | $0 | FL |
| Freedom Platinum Plan Rx (HMO) | Freedom Health, Inc. | T1 | No | $0 | FL |
| Freedom Platinum Plan Rx (HMO) | Freedom Health, Inc. | T1 | No | $0 | FL |
| Freedom Platinum Plan Rx (HMO) | Freedom Health, Inc. | T1 | No | $0 | FL |
| Freedom Platinum Plan Rx (HMO) | Freedom Health, Inc. | T1 | No | $0 | FL |
| Freedom Platinum Rewards Plan Rx (HMO) | Freedom Health, Inc. | T1 | No | $0 | FL |
| Freedom Platinum Rewards Plan Rx (HMO) | Freedom Health, Inc. | T1 | No | $0 | FL |
| Freedom Platinum Rewards Plan Rx (HMO) | Freedom Health, Inc. | T1 | No | $0 | FL |
| Freedom Platinum Rewards Plan Rx (HMO) | Freedom Health, Inc. | T1 | No | $0 | FL |
| Freedom Platinum Rewards Plan Rx (HMO) | Freedom Health, Inc. | T1 | No | $0 | FL |
Show the next 30 plans
| Freedom Platinum Rewards Plan Rx (HMO) | Freedom Health, Inc. | T1 | No | $0 | FL |
| Freedom Máximo (HMO-POS) | Freedom Health, Inc. | T1 | No | $0 | FL |
| Freedom Máximo (HMO-POS) | Freedom Health, Inc. | T1 | No | $0 | FL |
| Optimum Gold Rewards Plan (HMO) | Optimum Healthcare, Inc. | T1 | No | $0 | FL |
| Optimum Platinum Plan (HMO) | Optimum Healthcare, Inc. | T1 | No | $0 | FL |
| Optimum Gold Plan (HMO) | Optimum Healthcare, Inc. | T1 | No | $0 | FL |
| Optimum Gold Rewards Plan (HMO) | Optimum Healthcare, Inc. | T1 | No | $0 | FL |
| Optimum Gold Rewards Plan (HMO) | Optimum Healthcare, Inc. | T1 | No | $0 | FL |
| Optimum Diamond Rewards COPD (HMO C-SNP) | Optimum Healthcare, Inc. | T1 | No | $0 | FL |
| Optimum Diamond Savings COPD (HMO C-SNP) | Optimum Healthcare, Inc. | T1 | No | $0 | FL |
| Optimum Gold Plus Plan (HMO) | Optimum Healthcare, Inc. | T1 | No | $0 | FL |
| Optimum Diamond Rewards COPD (HMO C-SNP) | Optimum Healthcare, Inc. | T1 | No | $0 | FL |
| Florida Complete Care-Duals VIP (HMO-POS D-SNP) | Hpmp OF Florida, Inc. | T1 | No | $0 | FL |
| ElderServe MAP (HMO D-SNP) | Elderserve Health, Inc. | T1 | Yes | $0 | NY |
| Cooperative Advantage (HMO D-SNP) | Group Health Cooperative OF EAU Claire | T1 | Yes | $0 | WI |
| Longevity Health Plan (PPO I-SNP) | Longevity Health Plan OF NEW Jersey Insurance Comp | T1 | Yes | $0 | NJ |
| Mercy Care Advantage (HMO D-SNP) | Mercy Care | T1 | No | $0 | AZ |
| Mercy Care Advantage (HMO D-SNP) | Mercy Care | T1 | No | $0 | AZ |
| Mercy Care Advantage (HMO D-SNP) | Mercy Care | T1 | No | $0 | AZ |
| Elderplan Plus Long-Term Care (HMO-POS D-SNP) | Elderplan, Inc. | T1 | No | $0 | NY |
| Health Choice Pathway (HMO D-SNP) | Health Choice Arizona, Inc. | T1 | No | $0 | AZ |
| Healthfirst CompleteCare (HMO D-SNP) | Healthfirst Health Plan, Inc. | T1 | No | $0 | NY |
| IMCare Classic (HMO D-SNP) | Itasca Medical Care | T1 | No | $0 | MN |
| Johns Hopkins Advantage MD D-SNP (HMO D-SNP) | Hopkins Health Advantage, Inc. | T1 | No | $0 | MD |
| MetroPlus UltraCare (HMO D-SNP) | Metroplus Health Plan, Inc. | T1 | No | $0 | NY |
| Upper Peninsula Health Plan MI Coordinated Health (HMO D-SNP) | Upper Peninsula Health Plan, LLC | T1 | Yes | $0 | MI |
| CareSource Dual Advantage (HMO D-SNP) | Caresource Georgia Co. | T1 | Yes | $0 | GA |
| Senior Whole Health SCO (HMO D-SNP) | Senior Whole Health, LLC | T1 | No | $0 | MA |
| Senior Whole Health SCO NHC (HMO D-SNP) | Senior Whole Health, LLC | T1 | No | $0 | MA |
| Molina One Care (HMO D-SNP) | Senior Whole Health, LLC | T1 | No | $0 | MA |
Showing top 50 of 100 plans.
Frequently Asked Questions
Is nafcillin 1000 MG Injection covered by Medicare Part D?
Yes, nafcillin 1000 MG Injection is covered by 4,993 Medicare Part D plans (98.8% of all Part D formularies).
What tier is nafcillin 1000 MG Injection on Medicare Part D plans?
nafcillin 1000 MG Injection averages Tier 2.9 across Part D plans, ranging from Tier 1 to Tier 6.
Does nafcillin 1000 MG Injection require prior authorization?
9% of Part D formularies require prior authorization for nafcillin 1000 MG Injection. Step therapy: 0%. Quantity limits: 0%.
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
Similar prior-authorization rate
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