What is NDC 51655-476?

51655-476 is the product NDC for Doxazosin, Doxazosin mesylate 1 mg/1 tablet, listed with the FDA by Northwind Health Company, LLC. It has 1 package NDC, shown above in 10- and 11-digit form.

Northwind Health Company, LLC, NDC labeler code 51655. The labeler is the company responsible for the label; it may be the manufacturer, a repackager or a distributor.

What other NDCs exist for Doxazosin?

106 other product NDCs are listed under this name.

Is there a related HCPCS / J-code?

Not in Med-Code's curated HCPCS directory.

Doxazosin NDC 51655-476 | National Drug Code

NDC codes

FDA NDC Directory

Product NDC (as listed)51655-476Labeler and product segments. Claims need a package NDC.

Product NDC at billing width51655-0476Add 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
51655-476-52	5165504765251655047652	30 TABLET in 1 BOTTLE, PLASTIC (51655-476-52)Marketed from Nov 30, 2020

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): Doxazosin
Generic name (nonproprietary): doxazosin
Active ingredients: Doxazosin mesylate — 1 mg/1
Dosage form: Tablet
Route: Oral
Labeler: Northwind Health Company, LLCNDC labeler code 51655
Product type: Prescription drug
Marketing category: ANDA — Abbreviated New Drug Application (generic)Application ANDA 075580
Marketing start: Nov 30, 2020
Listing expires: Dec 31, 2027
Other FDA classes: Adrenergic alpha-Antagonists (Mechanism)
Identifiers: Product ID 51655-476_49ee3558-5938-6fef-e063-6294a90a34d6SPL ID 49ee3558-5938-6fef-e063-6294a90a34d6SPL set ID f306adae-a2fe-5477-e053-2995a90a7838RxCUI 197625UNII 86P6PQK0MU
Pharmacologic class: alpha-Adrenergic Blocker

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

N451655047652 followed by a unit qualifier and the quantity

Package 51655-0476-52. 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 1, 2026.

Indications (excerpt from the label)

Doxazosin tablets are an alpha 1 adrenergic antagonist indicated for: Signs and symptoms of Benign Prostatic Hyperplasia (BPH) Treatment of HypertensionTreatment of Hypertension 1.1 Benign Prostatic Hyperplasia (BPH) Doxazosin tablets are indicated for the treatment of the signs and symptoms of BPH. 1.2 Hypertension Doxazosin tablets are indicated for the treatment of hypertension, to lower blood pressure. Lowering blood pressure reduces the risk of fatal and nonfatal cardiovascular events, primarily strokes and myocardial infarctions. These benefits have been seen in controlled trials of antihypertensive drugs from a wide variety of pharmacologic classes, including this drug. Control of hig…

Excerpt only. Read the full label for complete information.

Full label on DailyMed (opens in a new tab)

About NDC 51655-476

What is NDC 51655-476?: 51655-476 is the product NDC for Doxazosin, Doxazosin mesylate 1 mg/1 tablet, listed with the FDA by Northwind Health Company, LLC. It has 1 package NDC, shown above in 10- and 11-digit form.
What drug is associated with this NDC?: Doxazosin.
What is the active ingredient?: Doxazosin mesylate.
Who is the labeler?: Northwind Health Company, LLC, NDC labeler code 51655. The labeler is the company responsible for the label; it may be the manufacturer, a repackager or a distributor.
What other NDCs exist for Doxazosin?: 106 other product NDCs are listed under this name. See all Doxazosin 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 Doxazosin NDCs
Product	Strength	Form · route	Labeler	Product NDC	Package NDCs (11-digit)
Doxazosin	Doxazosin mesylate 2 mg/1	TabletOral	Rising Pharma Holdings, Inc.	16571-166	16571-0166-01
Doxazosin	Doxazosin mesylate 1 mg/1	TabletOral	Rising Pharma Holdings, Inc.	16571-165	16571-0165-01
Doxazosin	Doxazosin mesylate 4 mg/1	TabletOral	Rising Pharma Holdings, Inc.	16571-167	16571-0167-01
Doxazosin	Doxazosin mesylate 8 mg/1	TabletOral	Rising Pharma Holdings, Inc.	16571-168	16571-0168-01
Doxazosindoxazosin mesylate	Doxazosin mesylate 1 mg/1	TabletOral	Aurobindo Pharma Limited	59651-892	59651-0892-0159651-0892-99
Doxazosindoxazosin mesylate	Doxazosin mesylate 2 mg/1	TabletOral	Aurobindo Pharma Limited	59651-893	59651-0893-0159651-0893-99
Doxazosindoxazosin mesylate	Doxazosin mesylate 4 mg/1	TabletOral	Aurobindo Pharma Limited	59651-894	59651-0894-0159651-0894-99
Doxazosindoxazosin mesylate	Doxazosin mesylate 8 mg/1	TabletOral	Aurobindo Pharma Limited	59651-895	59651-0895-0159651-0895-99
Doxazosin	Doxazosin mesylate 4 mg/1	TabletOral	REMEDYREPACK INC.	70518-4031	70518-4031-00
Doxazosin	Doxazosin mesylate 2 mg/1	TabletOral	REMEDYREPACK INC.	70518-3965	70518-3965-0070518-3965-01

All 107 Doxazosin NDCs

Other NDCs under ANDA 075580

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

FDA NDC Directory listings under ANDA 075580
Product	Strength	Form · route	Labeler	Product NDC
Doxazosin	Doxazosin mesylate 1 mg/1	TabletOral	Major Pharmaceuticals	0904-5522
Doxazosin	Doxazosin mesylate 2 mg/1	TabletOral	Major Pharmaceuticals	0904-5523
Doxazosin	Doxazosin mesylate 4 mg/1	TabletOral	Major Pharmaceuticals	0904-5524
Doxazosin	Doxazosin mesylate 2 mg/1	TabletOral	AvKARE	42291-258
Doxazosin	Doxazosin mesylate 4 mg/1	TabletOral	AvKARE	42291-259
Doxazosin	Doxazosin mesylate 8 mg/1	TabletOral	AvKARE	42291-260
Doxazosin	Doxazosin mesylate 2 mg/1	TabletOral	PD-Rx Pharmaceuticals, Inc.	43063-739
Doxazosin	Doxazosin mesylate 1 mg/1	TabletOral	A-S Medication Solutions	50090-0701
Doxazosin	Doxazosin mesylate 2 mg/1	TabletOral	A-S Medication Solutions	50090-0704
Doxazosin	Doxazosin mesylate 1 mg/1	TabletOral	AvPAK	50268-222
Doxazosin	Doxazosin mesylate 2 mg/1	TabletOral	AvPAK	50268-223
Doxazosin	Doxazosin mesylate 4 mg/1	TabletOral	AvPAK	50268-224
Doxazosin	Doxazosin mesylate 8 mg/1	TabletOral	AvPAK	50268-225
Doxazosin	Doxazosin mesylate 2 mg/1	TabletOral	Cardinal Health 107, LLC	55154-7996
Doxazosin	Doxazosin mesylate 1 mg/1	TabletOral	Apotex Corp.	60505-0093
Doxazosin	Doxazosin mesylate 2 mg/1	TabletOral	Apotex Corp.	60505-0094
Doxazosin	Doxazosin mesylate 4 mg/1	TabletOral	Apotex Corp.	60505-0095
Doxazosin	Doxazosin mesylate 8 mg/1	TabletOral	Apotex Corp.	60505-0096
Doxazosin	Doxazosin mesylate 4 mg/1	TabletOral	NuCare Pharmaceuticals, Inc.	68071-3298
Doxazosin	Doxazosin mesylate 2 mg/1	TabletOral	NuCare Pharmaceuticals, Inc.	68071-3341

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