SNOMED CT & ICD-10/11

SNOMED CT, governed by SNOMED International, is the comprehensive multilingual clinical terminology in use across EHRs in more than 80 countries. It encodes findings, disorders, procedures, body structures, organisms and substances in a poly-hierarchy with formal definitions; the international edition contains over 350,000 active concepts.

The WHO's International Classification of Diseases — ICD-10 in widespread routine use, ICD-11 in adoption since 2022 — is the global standard for mortality and morbidity statistics, billing in many jurisdictions, and reporting to public-health authorities. Where SNOMED is granular and clinically expressive, ICD is statistically structured.

Research databases routinely cross-reference both; many countries license SNOMED for national use, and ICD is published openly by WHO.