This is the ValueSet that contains all the codes in ICD10 Diagnostic codes (https://nrces.in/ndhm/fhir/r4/ValueSet/ndhm-diagnostic-code) and ICD10 Diagnostic codes (https://nrces.in/ndhm/fhir/r4/ValueSet/ndhm-diagnostic-code). E.g. what you have to deal with if you get resources containing codes in either of them