› standards › gs1-healthcare-gtinGS1 Healthcare GTIN Allocation Rules Standard | GS1 GS1 Company Prefixes are licensed by GS1 Member Organisations to a user company to entitle that user company to create any of the GS1 identification keys, such as GTIN, SSCC, or GIAI. Note : While the GS1 Company Prefix can be used to determine which GS1 Member organisation allocated the prefix, it cannot be used to determine where an item was ...