In the NDC 5-4-2 format, which segment represents the pack size?

• A. First segment
• B. Second segment
• C. Third segment
• D. All digits combined

Answer: (C)

In the NDC 5-4-2 format, the last segment identifies the package size. The code is split into three parts: the first segment identifies the manufacturer (labeler), the second identifies the product, and the final two digits specify the packaging size or type for that product. This separation lets you know who made the item, which product it is, and exactly how it’s packaged, independent of the other two pieces. The full code uniquely identifies a specific product in a specific package, but the pack size information is carried specifically by that last segment.