What is NDC 66794-020?

66794-020 is the product NDC for Isoflurane, Isoflurane 1 mL/mL liquid, listed with the FDA by Piramal Critical Care, Inc.. It has 2 package NDCs, shown above in 10- and 11-digit form.

Piramal Critical Care, Inc., NDC labeler code 66794. The labeler is the company responsible for the label; it may be the manufacturer, a repackager or a distributor.

What other NDCs exist for Isoflurane?

4 other product NDCs are listed under this name.

Is there a related HCPCS / J-code?

Not in Med-Code's curated HCPCS directory.

Isoflurane NDC 66794-020 | National Drug Code

NDC codes

FDA NDC Directory

Product NDC (as listed)66794-020Labeler and product segments. Claims need a package NDC.

Product NDC at billing width66794-0020Add the package segment from the table below.

Package NDCs as listed with the FDA, and the 11-digit 5-4-2 form used on claims. The highlighted digit is the added leading zero.
Package NDC	11-digit (billing)	Package	Copy
66794-020-10	6679400201066794002010	100 mL in 1 BOTTLE (66794-020-10)Marketed from Nov 13, 2013
66794-020-25	6679400202566794002025	250 mL in 1 BOTTLE, GLASS (66794-020-25)Marketed from Nov 13, 2013

How the 11-digit form is made: The product segment has 3 digits, so one leading zero is added to it (5-3-2 → 5-4-2). Formatting the NDC does not by itself make it billable — the product, package and quantity must match what was dispensed or administered, and payer rules apply. Conversion rules

Product information

Brand name (proprietary): Isoflurane
Generic name (nonproprietary): isoflurane
Active ingredients: Isoflurane — 1 mL/mL
Dosage form: Liquid
Route: Respiratory (Inhalation)
Labeler: Piramal Critical Care, Inc.NDC labeler code 66794
Product type: Prescription drug
Marketing category: ANDA — Abbreviated New Drug Application (generic)Application ANDA 074416
Marketing start: Nov 13, 2013
Listing expires: Dec 31, 2026
Other FDA classes: General Anesthesia (Physiologic effect)
Identifiers: Product ID 66794-020_43ec760c-2344-b345-e063-6394a90a6293SPL ID 43ec760c-2344-b345-e063-6394a90a6293SPL set ID 13c9c37a-0c3d-450a-a61e-d2796818b18fRxCUI 542347UNII CYS9AKD70PUPC 0366794020106
Pharmacologic class: General Anesthetic

Billing references

What Med-Code can say about coding this product, and where each statement comes from. Nothing here is inferred from the name alone.

HCPCS codeNo match

No drug-specific HCPCS code in Med-Code's directory for this product. The directory is curated and not complete — check the current CMS HCPCS file before billing.

NDC on a medical claim

N466794002010 followed by a unit qualifier and the quantity

Package 66794-0020-10. Unit qualifiers: F2 (international unit), GR (gram), ME (milligram), ML (milliliter), UN (unit (each)). The qualifier and quantity depend on what was given. About the N4 qualifier

Product label

Current FDA label (SPL), effective Nov 26, 2025.

Indications (excerpt from the label)

Isoflurane USP may be used for induction and maintenance of general anesthesia. Adequate data have not been developed to establish its application in obstetrical anesthesia. Isoflurane USP, a general anesthetic, is an inhalation agent indicated for induction and maintenance of general anesthesia. ( 1 )

Excerpt only. Read the full label for complete information.

Full label on DailyMed (opens in a new tab)

About NDC 66794-020

What is NDC 66794-020?: 66794-020 is the product NDC for Isoflurane, Isoflurane 1 mL/mL liquid, listed with the FDA by Piramal Critical Care, Inc.. It has 2 package NDCs, shown above in 10- and 11-digit form.
What drug is associated with this NDC?: Isoflurane.
What is the active ingredient?: Isoflurane.
Who is the labeler?: Piramal Critical Care, Inc., NDC labeler code 66794. The labeler is the company responsible for the label; it may be the manufacturer, a repackager or a distributor.
What other NDCs exist for Isoflurane?: 4 other product NDCs are listed under this name. See all Isoflurane NDCs.
Is there a related HCPCS / J-code?: Not in Med-Code's curated HCPCS directory. See Billing references above.

Other finished products listed under the same name: strengths, forms and labelers.

Other Isoflurane NDCs
Product	Strength	Form · route	Labeler	Product NDC	Package NDCs (11-digit)
Isoflurane	Isoflurane 100 mL/100mL	LiquidRespiratory (Inhalation)	Shandong New Time Pharmaceutical Co., Ltd.	42677-326	42677-0326-01
Isoflurane	Isoflurane 250 mL/250mL	LiquidRespiratory (Inhalation)	Shandong New Time Pharmaceutical Co., Ltd.	42677-327	42677-0327-01
Isoflurane	Isoflurane 1 mL/mL	LiquidRespiratory (Inhalation)	Piramal Critical Care, Inc.	66794-017	66794-0017-1066794-0017-25
Isoflurane	Isoflurane 1 mL/mL	LiquidRespiratory (Inhalation)	Halocarbon Life Sciences, LLC	12164-012	12164-0012-1012164-0012-25

Other NDCs under ANDA 074416

Products listed under the same FDA application: other strengths and forms, and repackagers who relabel the same product.

FDA NDC Directory listings under ANDA 074416
Product	Strength	Form · route	Labeler	Product NDC
Terrellisoflurane	Isoflurane 1 mL/mL	LiquidRespiratory (Inhalation)	Piramal Critical Care, Inc.	66794-011