Union of http://hl7.org/fhir/ValueSet/observation-codes and http://hl7.eu/fhir/base-r5/ValueSet/lab-obsCode-eu-lab

This is the ValueSet that contains all the codes in LOINC Codes (http://hl7.org/fhir/ValueSet/observation-codes) and Laboratory Code (http://hl7.eu/fhir/base-r5/ValueSet/lab-obsCode-eu-lab). E.g. what you have to deal with if you get resources containing codes in either of them

CodeSystem

Generated Narrative: ValueSet 94653609-ad59-4d11-954d-8ecaa928ac0e-104

This value set includes codes based on the following rules: