Milk of Magnesia (magnesium hydroxide) NDC 0121-0431

NDC codes

FDA NDC Directory

Product NDC (as listed)0121-0431Labeler and product segments. Claims need a package NDC.

Product NDC at billing width00121-0431Add 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
0121-0431-30	00121043130	10 TRAY in 1 CASE (0121-0431-30) / 10 CUP, UNIT-DOSE in 1 TRAY / 30 mL in 1 CUP, UNIT-DOSEMarketed from Sep 4, 1979

How the 11-digit form is made: The labeler segment has 4 digits, so one leading zero is added to it (4-4-2 → 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): Milk of Magnesia
Generic name (nonproprietary): magnesium hydroxide
Active ingredients: Magnesium hydroxide — 2400 mg/30mL
Dosage form: Suspension
Route: Oral
Labeler: PAI Holdings, LLC dba PAI Pharma
Product type: Over-the-counter drug
Marketing category: OTC monograph drugApplication M 007
Marketing start: Sep 4, 1979
Listing expires: Dec 31, 2027
Other FDA classes: Increased Large Intestinal Motility (Physiologic effect)Inhibition Large Intestine Fluid/Electrolyte Absorption (Physiologic effect)Inhibition Small Intestine Fluid/Electrolyte Absorption (Physiologic effect)Magnesium Ion Exchange Activity (Mechanism)Osmotic Activity (Mechanism)Stimulation Large Intestine Fluid/Electrolyte Secretion (Physiologic effect)
Identifiers: Product ID 0121-0431_57f5d77e-6712-4cd8-8299-3fe42ff67aefSPL ID 57f5d77e-6712-4cd8-8299-3fe42ff67aefSPL set ID 2de868a0-c652-473c-8b61-636083b7f757RxCUI 253017UNII NBZ3QY004S
Pharmacologic class: Calculi Dissolution Agent; Osmotic Laxative

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

N400121043130 followed by a unit qualifier and the quantity

Package 00121-0431-30. 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 Jan 22, 2026.

Indications (excerpt from the label)

Uses as Antacid • relieves • heartburn • sour stomach • acid indigestion • and upset stomach associated with these symptoms

Excerpt only. Read the full label for complete information.

Full label on DailyMed (opens in a new tab)

Other NDCs under M 007

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

FDA NDC Directory listings under M 007
Product	Strength	Form · route	Labeler	Product NDC
HEB Fiber Therapymethylcellulose	Methylcellulose (4000 mpa.s) 2 g/10.2g	Powder, For solutionOral	HEB	37808-716
Sennosides	Sennosides a and b 15 mg/1	Tablet, Sugar coatedOral	TIME CAP LABORATORIES, INC	49483-079
Laxativesennosides	Sennosides 25 mg/1	TabletOral	WALGREENS	0363-9978
Sennasennosides 8.6 mg tablets	Sennosides 8.6 mg/1	TabletOral	Aarkish Pharmaceuticals NJ Inc.	81005-101
Mineral Oil	Mineral oil 999 mg/mL	LiquidOral, Topical	Better Living Brands, LLC	21130-831
meijer Natural Fiberpsyllium husk	Psyllium husk 3.4 g/12g	PowderOral	MEIJER DISTRIBUTION INC	41250-455
Publix Women Laxativebisacodyl	Bisacodyl 5 mg/1	TabletOral	PUBLIX SUPER MARKETS, INC	41415-121
Sennosides	Sennosides 17.2 mg/17.21	Capsule, Liquid filledOral	H E B	37808-712
citromamagesium citrate	Magnesium citrate 1.745 g/29.6mL	LiquidOral	Perrigo Direct, Inc	50804-164
Senna Ssennosides and docusate sodium	Docusate sodium 50 mg/1; Sennosides 8.6 mg/1	Tablet, CoatedOral	Medline Industries, LP	53329-989
Chocolated Laxativesennosides stimulant laxative	Sennosides 15 mg/1	Tablet, ChewableOral	Walgreens	0363-5000
Senna-Sdocusate sodium 50 mg sennosides 8.6 mg	Sennosides 8.6 mg/1; Docusate sodium 50 mg/1	Tablet, Film coatedOral	Aarkish Pharmaceuticals NJ Inc.	81005-102
Stool Softener Laxativedocusate sodium	Docusate sodium 100 mg/1	Capsule, Liquid filledOral	The Kroger Co.	30142-451
Sal Inglesa EPSOM SALTmagnesium sulfate heptahydrate	Magnesium sulfate heptahydrate 1 g/g	CrystalOral	Menper Distributors, Inc	53145-580
Fiber Laxativecalcium polycarbophil	Calcium polycarbophil 625 mg/1	TabletOral	Magno-Humphries, Inc.	54257-379
Epsom Saltmagnesium sulfate	Magnesium sulfate heptahydrate 1 g/g	Granule, For solutionOral	CVS Pharmacy, Inc.	69842-602
citromamagesium citrate	Magnesium citrate 1.745 g/29.6mL	LiquidOral	Perrigo Direct, Inc	50804-166
Fiber Laxcalcium polycarbophil	Calcium polycarbophil 625 mg/1	Tablet, Film coatedOral	PD-Rx Pharmaceuticals, Inc.	55289-949
Epsom Saltmagnesium sulfate	Magnesium sulfate, Unspecified 1 g/g	GranuleOral, Topical	Whole Foods Market	42681-6413
Sennosides and Docusate Sodiumsennosides, docusate sodium	Sennosides 8.6 mg/1; Docusate sodium 50 mg/1	TabletOral	Reliable-1 Laboratories LLC	69618-065

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