DrugDashboards

Primaxin Iv

imipenem and cilastatin sodium · IMIPENEM 500 mg/100mL; CILASTATIN SODIUM 500 mg/100mL · Injection, Powder, For Solution · Intravenous · Merck Sharp & Dohme LLC

NDC 00006-3516-59 · 25 VIAL, SINGLE-DOSE in 1 TRAY / 100 mL in 1 VIAL, SINGLE-DOSE · NDA · View full market →

The short version

Just 2 companies supply this market — thin enough that a single exit would be felt immediately.

The numbers behind every sentence are on this page below — and the Watch button emails you when any of them move.

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%)$6.52per billing unit (250 MG)HCPCS J0743 · Jul 1, 2026
  • Part D point of sale (median)$32.52per unitnegotiated price across 15 plans — before rebates · Apr 1, 2026
  • Federal ceiling (Big4)$11.38per unitMerck Sharp & Dohme LLC · Jan 1, 2026

Medicare Part D

All Part D pricing →
ⓘ How this was built
Data sources
  • CMS quarterly Prescription Drug Plan Formulary & Pricing files (SPUF)
Method

Negotiated 30-day point-of-sale unit prices and formulary terms aggregated across every unsuppressed Part D and MA-PD plan for the quarter shown. Point of sale means gross of confidential rebates. CMS publishes one representative NDC per drug concept (RxCUI) rather than every package, so these figures come from CMS's representative package for the same drug — matched on generic name, strength, and dosage form. Estimated from MedPAC's program-wide rebate aggregates (June 2023: DIR = 29% of gross Part D spending; brand rebates ≈ 25–40% of gross, generics minimal). Actual rebates are confidential and vary widely by drug — this is a range, not a fact about this drug.

Pipeline and calculations built by Claude (Fable 5) from the public datasets above. Educational only — verify against primary sources before acting.

Plans pay at point of sale
$32.52per unit
middle half $32.50$32.62 · 15 plans · Apr 1, 2026
Est. net of rebates
$19.51–$24.39
brand drug — est. 25-40% rebate off the price at left
Coverage & restrictions
0%of plans cover it
tier 4 · prior auth 0% · step therapy 0% · qty limit 0%

*No drug-level rebate is public — the estimate applies MedPAC's program-wide brand rebate range to this drug's gross price. Tracked here for 8 quarters since 2024.

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
$816.28
Reported to Texas DSHS · 2026 annual filing · Merck Sharp & Dohme LLC

Manufacturer list price as filed — not what pharmacies actually pay after discounts.

Medicare Part B (ASP)

Payment limit per 250 MG
$6.517
HCPCS J0743 · 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 · median tier 4 across plans
  • Costs ≥ $950/fill
  • Biologic (BLA)
  • Injectable / infused
  • Orphan-drug exclusivity
  • REMS program

Regulatory

Application
NDA050587
TE code
AP
Approval date
Nov 26, 1985
Patents / exclusivity
None on file

Shortage history

  • Planned discontinuation Primaxin, Injection, 500mg (NDC 0006-3516-59)Jan 8, 2026

Recalls (this NDC)

No enforcement reports list this package NDC.

Manufacturers of imipenem and cilastatin sodium (Injection, Powder, For Solution)

LabelerStrengthFirst seenLast seen
Fresenius Kabi USA, LLCIMIPENEM 500 mg/20mL; CILASTATIN SODIUM 500 mg/20mLJul 22, 2026Sep 3, 2026
Merck Sharp & Dohme LLCIMIPENEM 500 mg/100mL; CILASTATIN SODIUM 500 mg/100mLJul 22, 2026Sep 2, 2026
Fresenius Kabi USA, LLCIMIPENEM 250 mg/20mL; CILASTATIN SODIUM 250 mg/20mLJul 22, 2026Aug 28, 2026
Fresenius Kabi USA, LLCCILASTATIN SODIUM 250 mg/20mL; IMIPENEM 250 mg/20mLJul 15, 2026Jul 18, 2026
Fresenius Kabi USA, LLCCILASTATIN SODIUM 500 mg/20mL; IMIPENEM 500 mg/20mLJul 15, 2026Jul 15, 2026
Merck Sharp & Dohme LLCCILASTATIN SODIUM 500 mg/100mL; IMIPENEM 500 mg/100mLJul 15, 2026Jul 15, 2026

Roster from daily NDC Directory diffs — first/last seen dates start July 2026.

Cite this page

DrugDashboards, "Primaxin Iv — NDC 00006-3516-59," retrieved September 3, 2026, https://drugdashboards.com/drug/00006351659.

Free to cite with attribution — see how the data is put together.