What is NDC 81033-027?

81033-027 is the product NDC for Magnesium Oxide, Magnesium oxide 400 mg/1 tablet, listed with the FDA by Kesin Pharma. It has 2 package NDCs, shown above in 10- and 11-digit form.

Kesin Pharma, NDC labeler code 81033. The labeler is the company responsible for the label; it may be the manufacturer, a repackager or a distributor.

What other NDCs exist for Magnesium Oxide?

16 other product NDCs are listed under this name.

Is there a related HCPCS / J-code?

Not in Med-Code's curated HCPCS directory.

Magnesium Oxide NDC 81033-027 | National Drug Code

NDC codes

FDA NDC Directory

Product NDC (as listed)81033-027Labeler and product segments. Claims need a package NDC.

Product NDC at billing width81033-0027Add 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
81033-027-01	81033002701	10 BLISTER PACK in 1 CARTON (81033-027-01) / 100 TABLET in 1 BLISTER PACK (81033-027-41)Marketed from Nov 1, 2025
81033-027-12	81033002712	120 TABLET in 1 BOTTLE (81033-027-12)Marketed from Apr 7, 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): Magnesium Oxide
Generic name (nonproprietary): magnesium oxide
Active ingredients: Magnesium oxide — 400 mg/1
Dosage form: Tablet
Route: Oral
Labeler: Kesin PharmaNDC labeler code 81033
Product type: Over-the-counter drug
Marketing category: OTC monograph drugApplication M 001
Marketing start: Apr 7, 2025
Listing expires: Dec 31, 2026
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 81033-027_4225e628-15ad-6bf0-e063-6394a90a98d6SPL ID 4225e628-15ad-6bf0-e063-6394a90a98d6SPL set ID 31f417f0-1637-eefa-e063-6294a90a121bRxCUI 198741UNII 3A3U0GI71GUPC 0381033027128
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

N481033002701 followed by a unit qualifier and the quantity

Package 81033-0027-01. 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 27, 2025.

Indications (excerpt from the label)

Uses relieves acid indigestion upset stomach

Excerpt only. Read the full label for complete information.

Full label on DailyMed (opens in a new tab)

About NDC 81033-027

What is NDC 81033-027?: 81033-027 is the product NDC for Magnesium Oxide, Magnesium oxide 400 mg/1 tablet, listed with the FDA by Kesin Pharma. It has 2 package NDCs, shown above in 10- and 11-digit form.
What drug is associated with this NDC?: Magnesium Oxide.
What is the active ingredient?: Magnesium oxide.
Who is the labeler?: Kesin Pharma, NDC labeler code 81033. The labeler is the company responsible for the label; it may be the manufacturer, a repackager or a distributor.
What other NDCs exist for Magnesium Oxide?: 16 other product NDCs are listed under this name. See all Magnesium 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 Magnesium Oxide NDCs
Product	Strength	Form · route	Labeler	Product NDC	Package NDCs (11-digit)
Magnesium Oxide	Magnesium oxide 400 mg/1	TabletOral	Marlex Pharmaceuticals Inc	10135-786	10135-0786-62
magnesium oxide	Magnesium oxide 420 mg/1	TabletOral	Marlex Pharmaceuticals Inc.	10135-721	10135-0721-01
Magnesium Oxide	Magnesium oxide 241.3 mg/1000mg	TabletOral	Belleview Biosciences	84447-001	84447-0001-12
Magnesium Oxide	Magnesium oxide 400 mg/1	TabletOral	APNAR PHARMA LP	24689-132	24689-0132-01
Magnesium Oxide	Magnesium oxide 253 mg/1	TabletOral	Endo USA	0603-0213	00603-0213-21
Magnesium Oxide	Magnesium oxide 400 mg/1	TabletOral	Westminster Pharmaceuticals, LLC	69367-298	69367-0298-20
Magnesium Oxide	Magnesium oxide 400 mg/1	TabletOral	A-S Medication Solutions	50090-7432	50090-7432-00
Magnesium Oxide	Magnesium oxide 400 mg/1	TabletOral	Method Pharmaceuticals, LLC	58657-120	58657-0120-12
Magnesium Oxide	Magnesium oxide 400 mg/1	TabletOral	Bryant Ranch Prepack	71335-1960	71335-1960-0171335-1960-0271335-1960-03+2 more
Magnesium Oxide	Magnesium oxide 400 mg/1	TabletOral	Bryant Ranch Prepack	63629-9420	63629-9420-01

All 17 Magnesium Oxide NDCs

Other NDCs under M 001

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

FDA NDC Directory listings under M 001
Product	Strength	Form · route	Labeler	Product NDC
Regular Strength Antacid Mintaluminum hydroxide, magnesium hydroxide, dimethicone	Aluminum hydroxide 400 mg/10mL + 2 more ingredients	SuspensionOral	KROGER COMPANY	30142-639
Antacid Ultra Strength Assorted Fruitsantacid	Calcium carbonate 1000 mg/1	Tablet, ChewableOral	WALGREEN CO.	0363-2103
Rolaids Ultra Strength Mintcalcium carbonate, magnesium hydroxide	Calcium carbonate 1000 mg/1; Magnesium hydroxide 200 mg/1	Tablet, ChewableOral	THE PROCTER & GAMBLE MANUFACTURING COMPANY	69423-828
Careone Regular Strength Calcium Antacidcalcium carbonate	Calcium carbonate 500 mg/1	Tablet, ChewableOral	Retail Business Services, LLC.	72476-022
Maximum Strength Antacidaluminum hydroxide, magnesium hydroxide, dimethicone	Aluminum hydroxide 800 mg/10mL + 2 more ingredients	SuspensionOral	CVS PHARMACY	51316-142
Supreme Antacid Cherrycalcium carbonate, magnesium hydroxide	Magnesium hydroxide 135 mg/5mL; Calcium carbonate 400 mg/5mL	LiquidOral	Discount Drug Mart, Inc	53943-613
Alka-Seltzer Extra Strength Heartburn ReliefChewscalcium carbonate	Calcium carbonate 750 mg/1	Tablet, ChewableOral	Bayer HealthCare LLC.	0280-0042
Kids Tummy Reliefcalcium carbonate	Calcium carbonate 400 mg/1	Tablet, ChewableOral	Genexa Inc.	69676-0043
Rolaids Ultra Strength Antacid Strawberrycalcium carbonate, magnesium hydroxide	Calcium carbonate 1330 mg/1; Magnesium hydroxide 235 mg/1	Tablet, ChewableOral	THE PROCTER & GAMBLE MANUFACTURING COMPANY	69423-829
Leader Extra Strength Antacidcalcium carbonate	Calcium carbonate 750 mg/1	Tablet, ChewableOral	CARDINAL HEALTH 110, LLC. DBA LEADER	70000-0430
Supreme Antacidcalcium carbonate, magnesium hydroxide	Magnesium hydroxide 135 mg/5mL; Calcium carbonate 400 mg/5mL	LiquidOral	Discount Drug Mart, Inc	53943-614
Leader Extra Strength Antacidcalcium carbonate	Calcium carbonate 750 mg/1	Tablet, ChewableOral	CARDINAL HEALTH 110, LLC. DBA LEADER	70000-0431
Rolaids MAX STRENGTH 1500calcium carbonate, magnesium hydroxide	Calcium carbonate 1250 mg/1; Magnesium hydroxide 250 mg/1	Tablet, ChewableOral	THE PROCTER & GAMBLE MANUFACTURING COMPANY	84126-373
Tums Regular Strengthcalcium carbonate	Calcium carbonate 500 mg/1	Tablet, ChewableOral	Haleon US Holdings LLC	0135-0611
Tums Naturalscalcium carbonate	Calcium carbonate 1000 mg/1	Tablet, ChewableOral	Haleon US Holdings LLC	0135-1326
Mylanta Classiccalcium carbonate, magnesium hydroxide, simethicone	Calcium carbonate 800 mg/10mL + 2 more ingredients	LiquidOral	Infirst Healthcare Inc.	62372-501
Quality Choice Antacid Assorted Fruitcalcium carbonate	Calcium carbonate 500 mg/1	Tablet, ChewableOral	CHAIN DRUG MARKETING ASSOCIATION	63868-701
DR. SANA BICARBONATO DE SODIO 4 Fl oz and 6 Flozsodium bicarbonate	Sodium bicarbonate 315 mg/g	PowderOral	Evi Labs	84178-050
Gavisconaluminum hydroxide and magnesium carbonate	Aluminum hydroxide 254 mg/5mL; Magnesium carbonate 237.5 mg/5mL	LiquidOral	Haleon US Holdings LLC	0135-0574
Mylanta Maximum Strength Vanilla Caramel Flavorantacid and anti gas aluminum hydroxide magnesium hydroxide and simethicone	Aluminum hydroxide 800 mg/10mL + 2 more ingredients	SuspensionOral	Infirst Healthcare Inc.	62372-504

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