What does the first segment of the NDC represent?

The first segment of the National Drug Code (NDC) is known as the labeler code, which is assigned to the manufacturer or distributor of the drug. This code typically identifies who is responsible for the drug's manufacturing and marketing. It helps in tracking and identifying the company that produced the pharmaceutical product, providing essential information about the source of the drug.

The labeler code is followed by a product code that specifies a particular formulation and strength of the medication, along with a package code that details the packaging size or type. This structure allows for precise identification of medications, ensuring accurate dispensing and distribution, which is crucial for safety and regulatory compliance in pharmacy practice.