What is NDC 55404-002?

55404-002 is the product NDC for Nitrous Oxide, Nitrous oxide 990 mL/L gas, listed with the FDA by Lessors, Incorporated. It has 7 package NDCs, shown above in 10- and 11-digit form.

Lessors, Incorporated, NDC labeler code 55404. The labeler is the company responsible for the label; it may be the manufacturer, a repackager or a distributor.

What other NDCs exist for Nitrous Oxide?

42 other product NDCs are listed under this name.

Is there a related HCPCS / J-code?

Not in Med-Code's curated HCPCS directory.

Nitrous Oxide NDC 55404-002 | National Drug Code

NDC codes

FDA NDC Directory

Product NDC (as listed)55404-002Labeler and product segments. Claims need a package NDC.

Product NDC at billing width55404-0002Add 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
55404-002-01	55404000201	242 L in 1 CYLINDER (55404-002-01)Marketed from Jan 1, 1964
55404-002-02	55404000202	940 L in 1 CYLINDER (55404-002-02)Marketed from Jan 1, 1964
55404-002-03	55404000203	1560 L in 1 CYLINDER (55404-002-03)Marketed from Jan 1, 1964
55404-002-04	55404000204	3630 L in 1 CYLINDER (55404-002-04)Marketed from Jan 1, 1964
55404-002-05	55404000205	4840 L in 1 CYLINDER (55404-002-05)Marketed from Jan 1, 1964
55404-002-06	55404000206	16550 L in 1 CYLINDER (55404-002-06)Marketed from Jan 1, 1964
55404-002-07	55404000207	15490 L in 1 CYLINDER (55404-002-07)Marketed from Jan 1, 1964

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): Nitrous Oxide
Generic name (nonproprietary): nitrous oxide
Active ingredients: Nitrous oxide — 990 mL/L
Dosage form: Gas
Route: Respiratory (Inhalation)
Labeler: Lessors, IncorporatedNDC labeler code 55404
Product type: Prescription drug
Marketing category: NDA — New Drug ApplicationApplication NDA 209989
Marketing start: Jan 1, 1964
Listing expires: Dec 31, 2026
Identifiers: Product ID 55404-002_410d77e3-f9bd-66e2-e063-6394a90a781dSPL ID 410d77e3-f9bd-66e2-e063-6394a90a781dSPL set ID b18bf991-bc6e-4678-99c0-61d7cbdb171aRxCUI 312022UNII K50XQU1029

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

N455404000201 followed by a unit qualifier and the quantity

Package 55404-0002-01. 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 Oct 13, 2025.

Full label on DailyMed (opens in a new tab)

About NDC 55404-002

What is NDC 55404-002?: 55404-002 is the product NDC for Nitrous Oxide, Nitrous oxide 990 mL/L gas, listed with the FDA by Lessors, Incorporated. It has 7 package NDCs, shown above in 10- and 11-digit form.
What drug is associated with this NDC?: Nitrous Oxide.
What is the active ingredient?: Nitrous oxide.
Who is the labeler?: Lessors, Incorporated, NDC labeler code 55404. The labeler is the company responsible for the label; it may be the manufacturer, a repackager or a distributor.
What other NDCs exist for Nitrous Oxide?: 42 other product NDCs are listed under this name. See all Nitrous Oxide 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 Nitrous Oxide NDCs
Product	Strength	Form · route	Labeler	Product NDC	Package NDCs (11-digit)
Nitrous Oxide	Nitrous oxide 992 mL/L	GasRespiratory (Inhalation)	WSM SUPPLIER LLC.	84120-003	84120-0003-0184120-0003-0284120-0003-03+12 more
Nitrous Oxide	Nitrous oxide 990 mL/L	GasRespiratory (Inhalation)	AGP LLC	22557-003	22557-0003-0122557-0003-0222557-0003-03+2 more
Nitrous Oxide	Nitrous oxide 992 mL/L	GasRespiratory (Inhalation)	Analgesic Services Inc	52085-003	52085-0003-0152085-0003-0252085-0003-03
Nitrous Oxide	Nitrous oxide 990 mL/L	GasRespiratory (Inhalation)	MAVERICK OXYGEN & RESPIRATORY EQUIPMENT, LLC	67477-002	67477-0002-0167477-0002-0267477-0002-03
Nitrous Oxide	Nitrous oxide 99 L/100L	GasRespiratory (Inhalation)	Keen Compressed Gas Co. Inc.	48273-002	48273-0002-0448273-0002-0548273-0002-06+3 more
Nitrous Oxide	Nitrous oxide 990 mL/L	GasRespiratory (Inhalation)	MITCHELL WELDING SUPPLY DBA Meritus Texas	72276-002	72276-0002-0172276-0002-0272276-0002-03+13 more
Nitrous Oxide	Nitrous oxide 990 mL/L	GasRespiratory (Inhalation)	DJB Gas Services, Inc	43621-003	43621-0003-1143621-0003-1243621-0003-13+8 more
Nitrous Oxide	Nitrous oxide 990 mL/L	GasRespiratory (Inhalation)	Central Welding Supply Company	70151-004	70151-0004-0270151-0004-0470151-0004-10+5 more
Nitrous Oxide	Nitrous oxide 990 mL/L	GasRespiratory (Inhalation)	Metro Welding Supply Corporation	62273-005	62273-0005-0162273-0005-0362273-0005-04+3 more
Nitrous Oxide	Nitrous oxide 990 mL/L	GasRespiratory (Inhalation)	American Welding & Gas	44076-012	44076-0012-0144076-0012-0244076-0012-03+11 more

All 43 Nitrous Oxide NDCs

Other NDCs under NDA 209989

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

FDA NDC Directory listings under NDA 209989
Product	Strength	Form · route	Labeler	Product NDC
Nitrous Oxide	Nitrous oxide 992 mL/L	GasRespiratory (Inhalation)	Analgesic Services Inc	52085-003
Nitrous Oxide	Nitrous oxide 995 mL/L	GasRespiratory (Inhalation)	MEDICAL-TECHNICAL GASES, INC.	10736-017
Nitrous Oxide	Nitrous oxide 990 mL/L	GasRespiratory (Inhalation)	MAVERICK OXYGEN & RESPIRATORY EQUIPMENT, LLC	67477-002
Nitrous Oxide	Nitrous oxide 99 L/100L	GasRespiratory (Inhalation)	Badger Welding Supplies, Inc.	12121-002
Nitrous Oxide	Nitrous oxide 992 mL/L	GasRespiratory (Inhalation)	Matheson Tri-Gas, Inc.	55037-301
Nitrous Oxide	Nitrous oxide 99 L/100L	GasRespiratory (Inhalation)	Corrigan Propane LLC dba Blue Water Industrial Products	44517-020
Oxygen	Nitrous oxide 992 mL/L	GasRespiratory (Inhalation)	All Gas & Welding Supplies Co., Inc.	56130-004
Nitrous Oxide	Nitrous oxide 99 L/100L	GasRespiratory (Inhalation)	Crumpton Welding Supply & Equipment, Inc.	52568-002
Nitrous Oxide	Nitrous oxide 990 mL/L	GasRespiratory (Inhalation)	MITCHELL WELDING SUPPLY DBA Meritus Texas	72276-002
Nitrous Oxide	Nitrous oxide 990 mL/L	GasRespiratory (Inhalation)	Linde Gas & Equipment Inc.	59579-004
Nitrous Oxide	Nitrous oxide 990 mL/L	GasRespiratory (Inhalation)	General Welding Supply Corp.	20703-003
Nitrous Oxide	Nitrous oxide 992 mL/L	GasRespiratory (Inhalation)	WSM SUPPLIER LLC.	84120-003
Nitrous Oxide	Nitrous oxide 99 L/100L	GasRespiratory (Inhalation)	Volunteer Welding Supply Inc	53511-003