NDC (National Drug Code)

1. NDC Directory

   Published drug listing data and the FDA NDC Directory files.

2. NDC formats

   Labeler, product and package segments, 10-digit 4-4-2, 5-3-2, 5-4-1 and 11-digit 5-4-2 billing format.

3. openFDA NDC API

   Query NDC records via API fields such as product_ndc, packaging and active_ingredients.

4. RxNorm linkage

   Mapping NDCs to RxNorm concepts.

5. DailyMed

   SPL drug labels indexed by NDC.

6. Medicaid drug rebate NDC

   NDC as the key for rebates and pharmacy claims.

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