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UDI / GTIN check digit
GS1 modulo-10 check digit used in many UDI-DI encodings (GTIN-8/12/13/14). Does not validate issuing agency, packaging level, or FDA GUDID listing.
Valid GTIN-14. Check digit 6 matches GS1.
Educational only. Not medical advice, not a regulatory determination, and not a substitute for qualified RA/QA, legal, clinical, or statistical counsel. UDI / GTIN check digit does not submit to FDA, Notified Bodies, or IRBs.
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