NDC
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The National Drug Code(NDC)System provides a directory of selected drugs distributed in the United States. Drugs listed under the NDC are identified by an 11-digit number comprised of three segments. The first segment, assigned by the FDA, identifies the vendor, product codes, are listed in the second segment, and the third segment, or package code, indicates the package size. The manufacturer assigns the second and third segments of the code for a given product.