nafcillin 1000 MG Injection

Verify with CMS →

nafcillin

RxCUI: 1721458

Important: Drug coverage and costs vary by plan and location. Verify coverage directly with your Medicare plan before filling a prescription. This is informational data only and should not replace advice from your healthcare provider or pharmacist.
98.8%
Plan Coverage
5,008
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 323 distinct formulary files spanning 5,008 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
323
Plans covering
5,008
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

100 plans
Tier 1, Preferred Generic

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
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

Frequently Asked Questions

Is nafcillin 1000 MG Injection covered by Medicare Part D?

Yes, nafcillin 1000 MG Injection is covered by 5,008 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%.

Data sourced from the Centers for Medicare & Medicaid Services (CMS). See our methodology for details. Retrieved and formatted by PlainMedicare Editorial