How many digits are used in the NDC to represent the package size?

The National Drug Code (NDC) is a unique identifier used in the United States for medications, and it consists of three segments: the labeler code, the product code, and the package code.

The package size is represented by the last segment, which consists of four digits. This segment indicates the specific packaging size of the drug, such as the quantity or the type of container in which the drug is supplied.

The NDC structure is as follows:

• The first segment (labeler code) identifies the manufacturer or distributor.
• The second segment (product code) identifies the specific drug formulation, strength, and dosage form.
• The third segment (package code) represents the package size and type.

Given this structure, the correct response to the question regarding the number of digits used to represent the package size is four, which aligns with the standard format for NDCs.