Codes are found within the vocabulary package at the link above which is available from this page: [https://ich.org/page/ich-electronic-common-technical-document-ectd-v40](https://ich.org/page/ich-electronic-common-technical-document-ectd-v40). Specifically, the codes are in the “ICH Context of Use” tab of the "ICH M8 OID Listing_eCTDv4_v5.xlsx" workbook. The codes are part of the ICH implementation of HL7 V3 Standard: Regulated Studies; Regulated Product Submissions (RPS), Release 2 Normative (described here: [https://www.hl7.org/implement/standards/product_brief.cfm?product_id=38](https://www.hl7.org/implement/standards/product_brief.cfm?product_id=38)) When using this uri in FHIR, the version identifier is mandatory and the code system uri cannot be used without it. This system uses an integer based versioning system in conjunction with an OID update. For example, if the version of the system is v5, the OID is 2.16.840.1.113883.3.989.2.2.1.1.5. This system has an OID stem of 2.16.840.1.113883.3.989.2.2.1.1.

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