NDC codes

FDA NDC Directory
Product NDC (as listed)31722-491Labeler and product segments. Claims need a package NDC.
Product NDC at billing width31722-0491Add 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 NDC11-digit (billing)PackageCopy
31722-491-23317220491231 BOTTLE in 1 CARTON (31722-491-23) / 230 mL in 1 BOTTLEMarketed from Jul 2, 2025

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)
Nitrofurantoin
Generic name (nonproprietary)
nitrofurantoin
Active ingredients
Nitrofurantoin — 25 mg/5mL
Dosage form
Suspension
Route
Oral
Product type
Prescription drug
Marketing category
ANDA — Abbreviated New Drug Application (generic)Application ANDA 219495
Marketing start
Listing expires
Other FDA classes
Nitrofurans (Chemical structure)
Identifiers
Product ID 31722-491_3c3bf8e0-5135-f295-e063-6294a90a7f67SPL ID 3c3bf8e0-5135-f295-e063-6294a90a7f67SPL set ID 4e06b31e-cc49-4526-beb6-e77021823aa9RxCUI 311989UNII 927AH8112L
Pharmacologic class
Nitrofuran Antibacterial

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 HCPCS code in Med-Code's directory. Oral products like this are usually dispensed by a pharmacy and billed by NDC.

NDC on a medical claim

N431722049123 followed by a unit qualifier and the quantity

Package 31722-0491-23. 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 .

Indications (excerpt from the label)

Nitrofurantoin oral suspension is indicated in adults and pediatric patients 1 month of age and older for the treatment of urinary tract infections due to susceptible strains of Escherichia coli, Enterococcus species, Staphylococcus aureus, Klebsiella species and Enterobacter species . Limitations of Use Nitrofurantoin oral suspension is not indicated for the treatment of pyelonephritis or perinephric abscesses [see Warnings and Precautions ( 5.7 )]. Usage To reduce the development of drug-resistant bacteria and maintain the effectiveness of nitrofurantoin oral suspension and other antibacterial drugs, nitrofurantoin oral suspension should be used only to treat or prevent infections that are…

Excerpt only. Read the full label for complete information.

Full label on DailyMed (opens in a new tab)

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