DrugDashboards

Neupogen

Filgrastim · FILGRASTIM 300 ug/.5mL · Injection, Solution · Intravenous; Subcutaneous · Amgen, Inc

NDC 55513-0924-91 · 1 SYRINGE in 1 BOX / .5 mL in 1 SYRINGE · BLA · View full market →

The short version

Just 2 companies supply this market — thin enough that a single exit would be felt immediately. The price has held steady around $650.05 per mL over the past year. Put together: worth watching — several of the pressures that precede supply trouble are present at once. Historically, drugs in this position went on to a new shortage within 90 days about 0.4% of the time — roughly 3× the typical drug (0.1%).

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.

  • Pharmacies pay (NADAC)$650.05per MLinvoice-surveyed acquisition cost · Aug 19, 2026
  • Medicare Part B pays (ASP+6%)$1.01per billing unit (1 MCG)HCPCS J1442 · Jul 1, 2026
  • Part D plans paid (avg)$599.02per dosage unitgross, before rebates — matched by drug name · 2024

Medicare Part D

All Part D pricing →

Matched to CMS's representative package for this drug (NDC 70121-1568-01) — same generic, strength, and dosage form. CMS prices one NDC per drug concept, not every package.

ⓘ 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
$304.31per unit
middle half $299.67$309.72 · 220 plans · Apr 1, 2026
Est. net of rebates
$182.59–$228.23
brand drug — est. 25-40% rebate off the price at left
Coverage & restrictions
4%of plans cover it
tier 4 · prior auth 90% · 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 10 quarters since 2024.

NADAC price per unit

$0$250.00$500.00$750.00Apr 2024Sep 2026$650.05
21 price points · per MLSource: CMS NADAC

Estimated fill cost

WAC per package, as filed
$333.70
Reported to Texas DSHS · 2026 annual filing · Amgen Usa Inc

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

Medicare Part B (ASP)

Payment limit per 1 MCG
$1.006
HCPCS J1442 · Jul 1, 2026 quarter · typically ASP + 6%

Medicaid spend (2025)

$1.1M
804 prescriptions paid by Medicaid nationally · all Medicaid spend →

Supply fragility

30Elevated risk

The score is counting real pressure here. One of these alone is routine; it’s the combination that makes this market worth watching.

  • 2 active manufacturers+20
  • sterile injectable+10

The score counts pressure that is already visible — fewer makers, shortages, recalls, falling prices. 0 means none of it; 100 means all of it at once. Recomputed daily · as of Sep 3, 2026

90-day shortage risk (model v2)

0.4%chance of a new FDA shortage posting for filgrastim (injectable) in the next 90 days

sterile injectable · sole-source market

For scale: the typical drug’s chance is about 0.1% — this one is 3× that.

Backtested statistical model over the whole market, not this package alone. Model details →

Is this a "specialty" drug?

There's no legal definition — it meets 3 of 6 public criteria. Why that matters →

  • Part D specialty tier
  • Costs ≥ $950/fill · avg $2,478.94 per prescription
  • Biologic (BLA)
  • Injectable / infused
  • Orphan-drug exclusivity
  • REMS program

Regulatory

Application
BLA103353
TE code
Approval date
Patents / exclusivity
None on file

Shortage history

No FDA shortage reports for this drug or its presentations.

Recalls (this NDC)

  • Class II · OngoingFeb 27, 2025
    Amgen, Inc.Stability data does not support expiry: the products have the potential to be out of specification at the time of expiry of 36-months.
  • Class II · OngoingFeb 27, 2025
    Amgen, Inc.Stability data does not support expiry: the products have the potential to be out of specification at the time of expiry of 36-months.

Manufacturers of Filgrastim (Injection, Solution)

LabelerStrengthFirst seenLast seen
Amgen, IncFILGRASTIM 300 ug/.5mLJul 15, 2026Sep 2, 2026
Amgen, IncFILGRASTIM 300 ug/mLJul 15, 2026Sep 2, 2026
Amgen, IncFILGRASTIM 480 ug/.8mLJul 15, 2026Sep 2, 2026
Amgen, IncFILGRASTIM 480 ug/1.6mLJul 15, 2026Sep 2, 2026
Amneal Pharmaceuticals LLCFILGRASTIM 480 ug/1.6mLJul 15, 2026Sep 2, 2026
Amneal Pharmaceuticals LLCFILGRASTIM 300 ug/.5mLJul 15, 2026Sep 2, 2026
Amneal Pharmaceuticals LLCFILGRASTIM 480 ug/.8mLJul 15, 2026Sep 2, 2026
Amneal Pharmaceuticals LLCFILGRASTIM 300 ug/mLJul 15, 2026Sep 2, 2026

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

Cite this page

DrugDashboards, "Neupogen — NDC 55513-0924-91," retrieved September 3, 2026, https://drugdashboards.com/drug/55513092491.

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