Korea uses KCD7 code, which is Korean version of ICD-10.
Approximately half of KCD7 codes are included in ICD-10, which are the most commonly used terms. Still, KCD7 has many non-existing codes in ICD-10.
Is it possible to add KCD7 code to the OMOP vocabulary, so every KCD-7 code can have concept_id (even if it’s not standard)? Then, we can store the original KCD7 code as concept_id in condition_source_concept_id field. And it will facilitate official mapping system between KCD7 and SNOMED-CT, ultimately.