NDC codes

FDA NDC Directory
Product NDC (as listed)51660-566Labeler and product segments. Claims need a package NDC.
Product NDC at billing width51660-0566Add 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
51660-566-21516600566215166005662120 TABLET, EXTENDED RELEASE in 1 CARTON (51660-566-21)Marketed from Apr 1, 2022
51660-566-41516600566415166005664140 TABLET, EXTENDED RELEASE in 1 CARTON (51660-566-41)Marketed from Apr 1, 2022
51660-566-68516600566685166005666868 TABLET, EXTENDED RELEASE in 1 CARTON (51660-566-68)Marketed from Jan 17, 2026

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)
Guaifenesin
Generic name (nonproprietary)
guaifenesin
Active ingredients
Guaifenesin — 600 mg/1
Dosage form
Tablet, Extended release
Route
Oral
Labeler
Ohm Laboratories, Inc.NDC labeler code 51660
Product type
Over-the-counter drug
Marketing category
ANDA — Abbreviated New Drug Application (generic)Application ANDA 209254
Marketing start
Listing expires
Other FDA classes
Decreased Respiratory Secretion Viscosity (Physiologic effect)Increased Respiratory Secretions (Physiologic effect)
Identifiers
Product ID 51660-566_4aa4fb35-6f33-6e33-e063-6394a90a495eSPL ID 4aa4fb35-6f33-6e33-e063-6394a90a495eSPL set ID 7076e42a-17ff-4c42-9963-2dc02c0a5e49RxCUI 310621, 636522UNII 495W7451VQ
Pharmacologic class
Expectorant

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

N451660056621 followed by a unit qualifier and the quantity

Package 51660-0566-21. 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)

Uses Helps loosen phlegm (mucus) and thin bronchial secretions to rid the bronchial passageways of bronchial mucus and make coughs more productive

Excerpt only. Read the full label for complete information.

Full label on DailyMed (opens in a new tab)

About NDC 51660-566

What is NDC 51660-566?
51660-566 is the product NDC for Guaifenesin, Guaifenesin 600 mg/1 tablet, extended release, listed with the FDA by Ohm Laboratories, Inc.. It has 3 package NDCs, shown above in 10- and 11-digit form.
What drug is associated with this NDC?
Guaifenesin.
What is the active ingredient?
Guaifenesin.
Who is the labeler?
Ohm Laboratories, Inc., NDC labeler code 51660. The labeler is the company responsible for the label; it may be the manufacturer, a repackager or a distributor.
What other NDCs exist for Guaifenesin?
63 other product NDCs are listed under this name. See all Guaifenesin 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 Guaifenesin NDCs
ProductStrengthForm · routeLabelerProduct NDCPackage NDCs (11-digit)
GuaifenesinGuaifenesin 1200 mg/1Tablet, Extended releaseOralINNOVUS PHARMACEUTICALS, INC.57483-14457483-0144-28
GuaifenesinGuaifenesin 1200 mg/1Tablet, Extended releaseOralAurohealth LLC58602-85758602-0857-93
Guaifenesinguaifenesin 400 mgGuaifenesin 400 mg/1TabletOralZennova LLC81993-00281993-0002-0181993-0002-0281993-0002-03+2 more
GuaifenesinGuaifenesin 1200 mg/1Tablet, Extended releaseOralTOPCO ASSOCIATES LLC76162-03176162-0031-56
GuaifenesinGuaifenesin 600 mg/1TabletOralYYBA CORP73581-40073581-0400-0273581-0400-07
GuaifenesinGuaifenesin 1200 mg/1Tablet, Extended releaseOralSam's West Inc68196-96068196-0960-56
GuaifenesinGuaifenesin 100 mg/5mLLiquidOralKESIN PHARMA CORPORATION81033-10281033-0102-16
GuaifenesinGuaifenesin 100 mg/5mLSolutionOralAmerican Health Packaging60687-85260687-0852-17
GuaifenesinGuaifenesin 200 mg/10mLSolutionOralAmerican Health Packaging60687-86360687-0863-56
GuaifenesinGuaifenesin 300 mg/15mLSolutionOralAmerican Health Packaging60687-87460687-0874-16

All 64 Guaifenesin NDCs

Other NDCs under ANDA 209254

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

FDA NDC Directory listings under ANDA 209254
ProductStrengthForm · routeLabelerProduct NDC
GuaifenesinGuaifenesin 600 mg/1Tablet, Extended releaseOralKroger Company30142-961
GuaifenesinGuaifenesin 600 mg/1Tablet, Extended releaseOralPublix Super Markets, Inc41415-996
GuaifenesinGuaifenesin 600 mg/1Tablet, Extended releaseOralAMERISOURCE BERGEN46122-750
GuaifenesinGuaifenesin 600 mg/1Tablet, Extended releaseOralCVS51316-071
GuaifenesinGuaifenesin 1200 mg/1Tablet, Extended releaseOralOhm Laboratories, Inc.51660-567
GuaifenesinGuaifenesin 600 mg/1Tablet, Extended releaseOralWalmart Stores, Inc.79903-124
Guaifenesin Extended ReleaseguaifenesinGuaifenesin 1200 mg/1Tablet, Extended releaseOralKroger Company30142-962
Guaifenesin Extended ReleaseguaifenesinGuaifenesin 1200 mg/1Tablet, Extended releaseOralPUBLIX SUPER MARKETS, INC41415-997
Guaifenesin Extended ReleaseguaifenesinGuaifenesin 1200 mg/1Tablet, Extended releaseOralSAM'S WEST INC68196-996

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