Final answer:
The NDC number, a unique identifier for FDA-approved medications, comprises three sets of numbers indicating the manufacturer, specific drug product, and packaging details.
Step-by-step explanation:
The National Drug Code (NDC) number is a unique identifier for medications approved by the U.S. Food and Drug Administration (FDA). The NDC number consists of three sets of numbers, each set serving a specific purpose. The first set indicates the labeler or manufacturer, the second set represents the product code, which identifies the specific strength, dosage form, and formulation of a drug, and the third set is the package code which specifies the packaging size and type.