U.S. Code of Federal Regulations

Regulations most recently checked for updates: Oct 07, 2025

All TitlesTitle 21Chapter IPart 207Subpart C - Subpart C—National Drug Code
§ 207.33 - What is the National Drug Code (NDC), how is it assigned, and what are its requirements?
§ 207.35 - What changes require a new NDC?
§ 207.37 - What restrictions pertain to the use of the NDC?
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