https://www.dol.gov/agencies/owcp/energy/regs/compliance/ndc_exclusion_list
National Drug Code (NDC) Exclusion List | U.S. Department of Labor
national drug codeexclusion listdepartment ofndc
https://www.ul.com/news/fda-proposes-rule-update-national-drug-code-format
FDA Proposes Rule to Update National Drug Code Format | UL Solutions
Under the proposal, the FDA would adopt a uniform 12-digit NDC format. The proposal also includes updates to drug product barcode label requirements.
national drug codefdaproposesruleupdate