A drug has an NDC of 16103-0350-11. The 0350 represents:

The NDC, or National Drug Code, is a unique identifier for medications in the United States, and it consists of three segments. In the code 16103-0350-11, the segment "0350" specifically refers to the identity of the drug. This middle segment essentially identifies the specific product, including its formulation, strength, and dosage form.

For example, different formulations of the same drug, or different strengths, will have unique codes in this section. The first segment (16103) denotes the labeler code assigned to the manufacturer, while the last segment (11) indicates the packaging size and type. Therefore, the identification of the drug primarily relies on the middle segment, which is crucial for distinguishing between various products on the market.