Standardized Cat Hair Allergenic Extract

Felis catus · FELIS CATUS DANDER 10000 [BAU]/mL; FELIS CATUS SKIN 10000 [BAU]/mL · Solution · Intradermal; Percutaneous; Subcutaneous · Greer Laboratories, Inc.

NDC 22840-0101-02 · 10 mL in 1 VIAL, MULTI-DOSE · BLA · View full market →

The short version

Only one company currently supplies this market — there is no backup if it stumbles.

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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.

Supply fragility

Not scored — fragility is computed for NADAC-priced NDCs.

Is this a "specialty" drug?

There's no legal definition — it meets 2 of 6 public criteria. Why that matters →

Part D specialty tier
Costs ≥ $950/fill
Biologic (BLA)
Injectable / infused
Orphan-drug exclusivity
REMS program

Regulatory

Application: BLA103397
TE code: —
Approval date: —
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 Felis catus (Solution)

Labeler	Strength	First seen	Last seen
Greer Laboratories, Inc.	FELIS CATUS DANDER 10000 [BAU]/mL; FELIS CATUS SKIN 10000 [BAU]/mL	Jul 15, 2026	Sep 2, 2026
Greer Laboratories, Inc.	FELIS CATUS DANDER 5000 [BAU]/mL; FELIS CATUS SKIN 5000 [BAU]/mL	Jul 15, 2026	Sep 2, 2026

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

Cite this page

DrugDashboards, "Standardized Cat Hair Allergenic Extract — NDC 22840-0101-02," retrieved September 3, 2026, https://drugdashboards.com/drug/22840010102.

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