The short version
7 companies supply this market — a reasonable cushion if one runs into trouble.
The numbers behind every sentence are on this page below — and the Watch button emails you when any of them move.
Nafcillin
Nafcillin Sodium · NAFCILLIN SODIUM 10 g/100mL · Injection, Powder, For Solution · Intravenous · Avenacy Inc.
NDC 83634-0101-99 · 1 BOTTLE in 1 CARTON / 100 mL in 1 BOTTLE · ANDA · View full market →
One drug, every price
The same NDC has different prices depending on who is paying. Units differ between rungs — compare within a rung over time, not rung against rung, unless the units match.
ⓘ How this was built
Data sources
- CMS NADAC (pharmacy acquisition, weekly)
- CMS Part B ASP quarterly payment limits
- CMS Maximum Fair Prices (IRA negotiated, NDC-level)
- Medicare Part D Spending by Drug (data.cms.gov, name-matched)
- VA FSS / Big4 federal contract prices (va.gov, twice monthly)
- ACA Federal Upper Limits + weighted AMP (data.medicaid.gov, monthly)
- California SB-17 WAC filings (list price, per package)
Method
Each rung is the newest figure for this NDC from one federal price system, shown with its own unit. Part D is matched by drug name because CMS publishes no NDCs there; it is gross spending, before confidential rebates.
Pipeline and calculations built by Claude (Fable 5) from the public datasets above. Educational only — verify against primary sources before acting.
- Medicare Part B pays (ASP+6%)$0.0470per billing unit (20 MG)HCPCS J2290 · Jul 1, 2026
- Part D plans paid (avg)$0.2585per dosage unitgross, before rebates — matched by drug name · 2024
Medicare Part D
No Medicare Part D plan in CMS's quarterly files lists this product. That usually means it is discontinued, a repackager's listing, or a product no plan has added to its formulary.
How Part D pricing works →NADAC price per unit
No NADAC pricing on file for this NDC — NADAC covers drugs dispensed by retail community pharmacies.
Estimated fill cost
WAC per package, as filed
$65.00
Reported to Texas DSHS · 2026 annual filing · Avenacy Inc
Manufacturer list price as filed — not what pharmacies actually pay after discounts.
Medicare Part B (ASP)
Payment limit per 20 MG
$0.047
HCPCS J2290 · Jul 1, 2026 quarter · typically ASP + 6%
Supply fragility
Not scored — fragility is computed for NADAC-priced NDCs.
Is this a "specialty" drug?
There's no legal definition — it meets 1 of 6 public criteria. Why that matters →
- Part D specialty tier
- Costs ≥ $950/fill · avg $617.70 per prescription
- Biologic (BLA)
- Injectable / infused
- Orphan-drug exclusivity
- REMS program
Regulatory
- Application
- ANDA090005
- TE code
- AP
- Approval date
- Apr 20, 2011
- Patents / exclusivity
- None on file
Shortage history
No FDA shortage reports for this drug or its presentations.
Recalls (this NDC)
No enforcement reports list this package NDC.
Manufacturers of Nafcillin Sodium (Injection, Powder, For Solution)
| Labeler | Strength | First seen | Last seen |
|---|---|---|---|
| Eugia US LLC | NAFCILLIN SODIUM 2 g/8mL | Jul 15, 2026 | Sep 3, 2026 |
| Armas Pharmaceuticals Inc. | NAFCILLIN SODIUM 2 g/1 | Jul 15, 2026 | Sep 2, 2026 |
| Armas Pharmaceuticals Inc. | NAFCILLIN SODIUM 1 g/1 | Jul 15, 2026 | Sep 2, 2026 |
| Avenacy Inc. | NAFCILLIN SODIUM 10 g/100mL | Jul 15, 2026 | Sep 2, 2026 |
| Eugia US LLC | NAFCILLIN SODIUM 1 g/4mL | Jul 15, 2026 | Sep 2, 2026 |
| Heritage Pharmaceuticals Inc. d/b/a/ Avet Pharmaceuticals Inc. | NAFCILLIN SODIUM 1 g/4mL | Jul 15, 2026 | Sep 2, 2026 |
| Heritage Pharmaceuticals Inc. d/b/a/ Avet Pharmaceuticals Inc. | NAFCILLIN SODIUM 2 g/8mL | Jul 15, 2026 | Sep 2, 2026 |
| NorthStar Rx, LLC | NAFCILLIN SODIUM 2 g/8mL | Jul 15, 2026 | Sep 2, 2026 |
| Onesource Specialty Pharma Limited | NAFCILLIN SODIUM 2 g/1 | Jul 15, 2026 | Sep 2, 2026 |
| Onesource Specialty Pharma Limited | NAFCILLIN SODIUM 1 g/1 | Jul 15, 2026 | Sep 2, 2026 |
| Sagent Pharmaceuticals | NAFCILLIN SODIUM 10 g/100mL | Jul 15, 2026 | Sep 2, 2026 |
| Eugia US LLC | NAFCILLIN SODIUM 10 g/100mL | Jul 15, 2026 | Aug 31, 2026 |
Roster from daily NDC Directory diffs — first/last seen dates start July 2026.
Cite this page
DrugDashboards, "Nafcillin — NDC 83634-0101-99," retrieved September 3, 2026, https://drugdashboards.com/drug/83634010199.
Free to cite with attribution — see how the data is put together.