Terrell (isoflurane) NDC 66794-019

NDC codes

FDA NDC Directory

Product NDC (as listed)66794-019Labeler and product segments. Claims need a package NDC.

Product NDC at billing width66794-0019Add 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
66794-019-10	66794001910	100 mL in 1 BOTTLE, GLASS (66794-019-10)Marketed from Mar 21, 2012
66794-019-25	66794001925	250 mL in 1 BOTTLE, GLASS (66794-019-25)Marketed from Mar 21, 2012

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): Terrell
Generic name (nonproprietary): isoflurane
Active ingredients: Isoflurane — 1 mL/mL
Dosage form: Liquid
Route: Respiratory (Inhalation)
Labeler: Piramal Critical Care Inc
Product type: Prescription drug
Marketing category: ANDA — Abbreviated New Drug Application (generic)Application ANDA 074502
Marketing start: Mar 21, 2012
Listing expires: Dec 31, 2026
Other FDA classes: General Anesthesia (Physiologic effect)
Identifiers: Product ID 66794-019_3ffffcd1-9a01-574d-e063-6294a90a004bSPL ID 3ffffcd1-9a01-574d-e063-6294a90a004bSPL set ID dbeb646f-dc6c-40f2-803c-68858d6ac080RxCUI 542347, 542355UNII CYS9AKD70P
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

N466794001910 followed by a unit qualifier and the quantity

Package 66794-0019-10. 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 6, 2025.

Indications (excerpt from the label)

Terrell may be used for induction and maintenance of general anesthesia. Adequate data have not been developed to establish its application in obstetrical anesthesia. Terrell, 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)

Other NDCs under ANDA 074502

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

FDA NDC Directory listings under ANDA 074502
Product	Strength	Form · route	Labeler	Product NDC
Isoflurane	Isoflurane 1 mL/mL	LiquidRespiratory (Inhalation)	Piramal Critical Care, Inc.	66794-017