AVONEX PEN 30 MCG/0.5 ML KIT (4 PACK)
FDA nonproprietary name: interferon beta-1a
For 1 unit (EA)
Pharmacies pay
$8,772.03 filed
1 × $8,772.025 per EA
CMS NADAC · nadac-national-average-drug-acquisition-cost-20261014.csv · eff. 2026-09-23 · as of 2026-10-14 · retrieved 2026-10-17
Medicare
We don’t know yet
No Medicare reference price. Part D: OpenBill did not match this NDC to a usable Medicare Part D spending row. Either Part D has none for it, or the rows that share its name could not safely be tied to it (for example, they mix units, routes or release forms, or the drug is sold over the counter, which Part D does not cover). Part B: This NDC is not in the current quarter’s Medicare Part B NDC-HCPCS crosswalk, so it has no Part B payment limit.
The spread
We don’t know yet
There is no Medicare figure to compare with, so there is no spread.
Cost-plus estimate
$10,092.83 estimated
$8,772.03 + $1,315.80 (15%) + $5.00 fee per fill = $10,092.83
This is a model, not a price any pharmacy quoted. Shipping is not included. How it is worked out
OpenBill calculation · nadac-national-average-drug-acquisition-cost-20261014.csv · NADAC eff. 2026-09-23 (file of 2026-10-14, retrieved 2026-10-17)
Open the interactive card Change the quantity, type what you were charged, and see every record in full.
What it is
AVONEX PEN 30 MCG/0.5 ML KIT (4 PACK) is how the CMS NADAC file names this product. The FDA NDC Directory lists it as interferon beta-1a, under the trade name “AVONEX”.
FDA gives its dosage form as kit and its route as intramuscular.
The labeler, the company named on the label, is Biogen Inc.
FDA lists no Established Pharmacologic Class for it.
The NADAC file of 2026-10-14 prices it under one NDC (National Drug Code), 59627-0333-04.
NADAC classes it as a brand-name drug (rate-setting class B), and does not mark it as sold over the counter.
What pharmacies pay
Pharmacies pay $8,772.03 for 1 unit (EA) (1 × $8,772.025 per EA, rounded to the cent), by the CMS NADAC file of 2026-10-14; that price took effect on 2026-09-23. That is what pharmacies pay their suppliers, not what they charge you.
NADAC’s explanation codes for it: 1, calculated from the most recently completed pharmacy survey; 5, calculated based on package size.
What NADAC measures · NADAC explanation codes
The NDC
- 59627-0333-04 · Biogen Inc. · $8,772.025 per EA · eff. 2026-09-23 filed
Other strengths, forms and brands
2 other products in the NADAC file share the FDA nonproprietary name interferon beta-1a with AVONEX PEN 30 MCG/0.5 ML KIT (4 PACK).
| Product | Pharmacies pay per unit | Medicare per unit |
|---|---|---|
| AVONEX 30 MCG/0.5 ML SYRINGE KIT (4 PACK) | $8,776.25231 per EA filed | We don’t know yet |
| AVONEX PEN 30 MCG/0.5 ML KIT (4 PACK) this page | $8,772.025 per EA filed | We don’t know yet |
| REBIF REBIDOSE 44 MCG/0.5 ML | $1,848.67278 per ML filed | $1,760.74864 per ML filed |
Part D is one average per brand and generic name, over every strength and form.
CMS NADAC · nadac-national-average-drug-acquisition-cost-20261014.csv · eff. 2026-01-03, 2026-09-23 · as of 2026-10-14 · retrieved 2026-10-17
Medicare Part D · DSD_PTD_RY26_P04_V10_DY24_BGM.csv · eff. 2024-01-01 to 2024-12-31 · as of 2026-06-25 · retrieved 2026-10-18
What Medicare paid
We don’t know yet; the card above says why.
Which Medicare figure OpenBill compares · How Part D is matched · How Part B is matched
What to ask at the counter
None of these figures is your price: what you pay depends on your pharmacy, your insurance, coupons and discounts.
- What is your cash price for 1 unit (EA)? Is it lower than what I would pay through my insurance?
- These are questions about price, not medical advice. Do not change or stop a medicine without talking to your prescriber or pharmacist.
Questions
- Why does this page start at 1 unit (EA)?
- NADAC prices this product per EA, and the FDA NDC Directory lists its NDC as dosage form “KIT” with route “INTRAMUSCULAR”. Only a tablet, capsule, lozenge or troche with route “ORAL”, or a tablet or film with route “SUBLINGUAL” or “BUCCAL”, starts at 30, and this is not one. NADAC’s EA for it may be the whole kit or one item in it, and the files do not say which. So the card starts at 1 unit (EA) rather than guess how many make up a fill; change it to match your prescription.