NDC codes

FDA NDC Directory
Product NDC (as listed)51655-537Labeler and product segments. Claims need a package NDC.
Product NDC at billing width51655-0537Add 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
51655-537-525165505375230 TABLET in 1 BOTTLE, PLASTIC (51655-537-52)Marketed from Dec 28, 2022

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)
Levothyroxine Sodium
Generic name (nonproprietary)
levothyroxine sodium
Active ingredients
Levothyroxine sodium — 175 ug/1
Dosage form
Tablet
Route
Oral
Product type
Prescription drug
Marketing category
NDA authorized genericApplication NDA 021342
Marketing start
Listing expires
Other FDA classes
Thyroxine (Chemical structure)
Identifiers
Product ID 51655-537_4a29f1d4-e310-07f1-e063-6294a90aed4bSPL ID 4a29f1d4-e310-07f1-e063-6294a90aed4bSPL set ID f31b5d54-7536-4290-e053-2a95a90ac235RxCUI 966249UNII 9J765S329G
Pharmacologic class
l-Thyroxine

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

N451655053752 followed by a unit qualifier and the quantity

Package 51655-0537-52. 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 . This label includes a boxed warning.

Indications (excerpt from the label)

Hypothyroidism Levothyroxine sodium tablets are indicated as a replacement therapy in primary (thyroidal), secondary (pituitary) and tertiary (hypothalamic) congenital or acquired hypothyroidism. Pituitary Thyrotropin (Thyroid-Stimulating Hormone, TSH) Suppression Levothyroxine sodium tablets are indicated as an adjunct to surgery and radioiodine therapy in the management of thyrotropin-dependent well-differentiated thyroid cancer. Limitations of Use: • Levothyroxine sodium tablets are not indicated for suppression of benign thyroid nodules and nontoxic diffuse goiter in iodine-sufficient patients as there are no clinical benefits and overtreatment with levothyroxine sodium tablets may induc…

Excerpt only. Read the full label for complete information.

Full label on DailyMed (opens in a new tab)

Other NDCs under NDA 021342

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

FDA NDC Directory listings under NDA 021342
ProductStrengthForm · routeLabelerProduct NDC
Levothyroxine SodiumLevothyroxine sodium 50 ug/1TabletOralNorthwind Health Company, LLC51655-532
Levothyroxine SodiumLevothyroxine sodium 100 ug/1TabletOralBryant Ranch Prepack71335-1814
Levothyroxine SodiumLevothyroxine sodium 75 ug/1TabletOralProficient Rx LP71205-655
Levothyroxine SodiumLevothyroxine sodium 112 ug/1TabletOralNorthwind Health Company, LLC51655-579
Levothyroxine SodiumLevothyroxine sodium 75 ug/1TabletOralNorthwind Health Company, LLC51655-576
Levothyroxine SodiumLevothyroxine sodium 200 ug/1TabletOralNorthwind Health Company, LLC51655-578
Levothyroxine SodiumLevothyroxine sodium 150 ug/1TabletOralNorthwind Health Company, LLC51655-583
Levothyroxine SodiumLevothyroxine sodium 137 ug/1TabletOralNorthwind Health Company, LLC51655-128
Levothyroxine SodiumLevothyroxine sodium 125 ug/1TabletOralBryant Ranch Prepack71335-1499
Levothyroxine SodiumLevothyroxine sodium 100 ug/1TabletOralNuCare Pharmaceuticals,Inc.68071-2278
Levothyroxine SodiumLevothyroxine sodium 25 ug/1TabletOralLannett Company, Inc0527-3280
Levothyroxine SodiumLevothyroxine sodium 50 ug/1TabletOralLannett Company, Inc0527-3281
Levothyroxine SodiumLevothyroxine sodium 75 ug/1TabletOralLannett Company, Inc0527-3282
Levothyroxine SodiumLevothyroxine sodium 88 ug/1TabletOralLannett Company, Inc0527-3283
Levothyroxine SodiumLevothyroxine sodium 100 ug/1TabletOralProficient Rx LP82804-222
Levothyroxine SodiumLevothyroxine sodium 100 ug/1TabletOralLannett Company, Inc0527-3284
Levothyroxine SodiumLevothyroxine sodium 88 ug/1TabletOralNorthwind Health Company, LLC51655-728
Levothyroxine SodiumLevothyroxine sodium 100 ug/1TabletOralA-S Medication Solutions50090-5654
Levothyroxine SodiumLevothyroxine sodium 200 ug/1TabletOralBryant Ranch Prepack71335-1940
Levothyroxine SodiumLevothyroxine sodium 112 ug/1TabletOralLannett Company, Inc0527-3285

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