What is NDC 16571-261?

16571-261 is the product NDC for Sulfasalazine, Sulfasalazine 500 mg/1 tablet, listed with the FDA by Rising Pharma Holdings, Inc.. It has 2 package NDCs, shown above in 10- and 11-digit form.

Rising Pharma Holdings, Inc., NDC labeler code 16571. The labeler is the company responsible for the label; it may be the manufacturer, a repackager or a distributor.

What other NDCs exist for Sulfasalazine?

11 other product NDCs are listed under this name.

Is there a related HCPCS / J-code?

Not in Med-Code's curated HCPCS directory.

Sulfasalazine NDC 16571-261 | National Drug Code

NDC codes

FDA NDC Directory

Product NDC (as listed)16571-261Labeler and product segments. Claims need a package NDC.

Product NDC at billing width16571-0261Add 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
16571-261-01	1657102610116571026101	100 TABLET in 1 CONTAINER (16571-261-01)Marketed from Nov 4, 2025
16571-261-30	1657102613016571026130	300 TABLET in 1 CONTAINER (16571-261-30)Marketed from Nov 4, 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): Sulfasalazine
Generic name (nonproprietary): sulfasalazine
Active ingredients: Sulfasalazine — 500 mg/1
Dosage form: Tablet
Route: Oral
Labeler: Rising Pharma Holdings, Inc.NDC labeler code 16571
Product type: Prescription drug
Marketing category: ANDA — Abbreviated New Drug Application (generic)Application ANDA 219046
Marketing start: Nov 4, 2025
Listing expires: Dec 31, 2026
Other FDA classes: Aminosalicylic Acids (Chemical structure)
Identifiers: Product ID 16571-261_4b43540c-2b08-44cb-81b8-4308dea2c141SPL ID 4b43540c-2b08-44cb-81b8-4308dea2c141SPL set ID 3254432e-87a4-4af0-afd1-d9e6f1b0efd4RxCUI 198232UNII 3XC8GUZ6CB
Pharmacologic class: Aminosalicylate

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

N416571026101 followed by a unit qualifier and the quantity

Package 16571-0261-01. 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 Nov 6, 2025.

Indications (excerpt from the label)

INDICATIONS AND USAGE Sulfasalazine tablets are indicated: a) in the treatment of mild to moderate ulcerative colitis, and as adjunctive therapy in severe ulcerative colitis; and b) for the prolongation of the remission period between acute attacks of ulcerative colitis.

Excerpt only. Read the full label for complete information.

Full label on DailyMed (opens in a new tab)

About NDC 16571-261

What is NDC 16571-261?: 16571-261 is the product NDC for Sulfasalazine, Sulfasalazine 500 mg/1 tablet, listed with the FDA by Rising Pharma Holdings, Inc.. It has 2 package NDCs, shown above in 10- and 11-digit form.
What drug is associated with this NDC?: Sulfasalazine.
What is the active ingredient?: Sulfasalazine.
Who is the labeler?: Rising Pharma Holdings, Inc., NDC labeler code 16571. The labeler is the company responsible for the label; it may be the manufacturer, a repackager or a distributor.
What other NDCs exist for Sulfasalazine?: 11 other product NDCs are listed under this name. See all Sulfasalazine 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 Sulfasalazine NDCs
Product	Strength	Form · route	Labeler	Product NDC	Package NDCs (11-digit)
Sulfasalazine	Sulfasalazine 500 mg/1	Tablet, Delayed releaseOral	Sunrise Pharmaceutical, Inc.	11534-201	11534-0201-0111534-0201-07
Sulfasalazine	Sulfasalazine 500 mg/1	TabletOral	Sunrise Pharmaceutical, Inc.	11534-200	11534-0200-0111534-0200-0411534-0200-07
Sulfasalazine	Sulfasalazine 500 mg/1	TabletOral	Teva Pharmaceuticals USA, Inc.	0093-3234	00093-3234-0100093-3234-0500093-3234-10
Sulfasalazine	Sulfasalazine 500 mg/1	TabletOral	Bryant Ranch Prepack	63629-9715	63629-9715-01
Sulfasalazine	Sulfasalazine 500 mg/1	TabletOral	REMEDYREPACK INC.	70518-1829	70518-1829-03
Sulfasalazine	Sulfasalazine 500 mg/1	Tablet, Delayed releaseOral	Mylan Pharmaceuticals Inc.	59762-0104	59762-0104-0559762-0104-06
Sulfasalazine	Sulfasalazine 500 mg/1	TabletOral	A-S Medication Solutions	50090-0086	50090-0086-04
Sulfasalazine	Sulfasalazine 500 mg/1	TabletOral	A-S Medication Solutions	50090-6936	50090-6936-00
Sulfasalazine	Sulfasalazine 500 mg/1	TabletOral	Mylan Pharmaceuticals Inc.	59762-5000	59762-5000-0559762-5000-06
Sulfasalazine	Sulfasalazine 500 mg/1	TabletOral	Aphena Pharma Solutions - Tennessee, LLC	71610-706	71610-0706-7071610-0706-80

All 12 Sulfasalazine NDCs