IIS: NDC Lookup Crosswalk

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This webpage is designed as a lookup table where the Unit of Use and Unit of Sale NDC are mapped to each other. A few vaccines are packaged with two component vaccines. Each component vaccine of a multiple component vaccine will have a unique NDC which also differs from the NDC of the unit of sale. Pentacel is an example. This means that there will be two rows linking the unit of use to unit of sale.

Global Trade Identification Numbers (GTINs) are provided as a proxy indicator that the vaccine is 2D barcoded. Note that we have recently learned that some of the GTINs in this table are inaccurate due to variations in the GTIN formats used by manufacturers. Specifically, some vaccine manufacturers are populating the first digit of the GTIN as a packaging level Indicator. Users are advised to use these GTIN values with caution until CDC can verify accuracy with the vaccine manufacturers.

A new expanded version of the NDC Lookup Crosswalk table is now available for download only. This new NDC Consolidated Crosswalk file provides additional field and code details and adds CPT codes associated to NDC Units of Use

Page last reviewed: June 30, 2026
Content source: National Center for Immunization and Respiratory Diseases