Data & methodology

Where this site's data comes from, how it is processed, and what has deliberately not been done to it.

Source

All classification content is the World Health Organization's International Classification of Diseases, 11th Revision (ICD-11), Mortality and Morbidity Statistics linearization, release 2026-01.

It is retrieved from WHO's official ICD-API, run locally from WHO's own whoicd/icd-api container image. Nothing is scraped from the WHO website and no third-party mirror is used, so the content here matches the official release exactly.

Last synchronised

Release: 2026-01
Data retrieved: 14 August 2026

WHO publishes a release each January. This site is rebuilt from the current release; pages carry a last-modified date that changes only when their content changes, not on every rebuild.

What is published

31,839 entities per language — 28 chapters, blocks and categories
30,320 of them carry an ICD-11 code
8,128 have a WHO definition (about 26%; WHO does not define every code)
309,283 index terms, inclusions and exclusions
Three languages: English, Spanish, German

Translations

Spanish and German come from WHO's own published language bundles for release 2026-01. No machine translation is used anywhere on this site. Where WHO has not translated a definition, none is shown rather than a generated one.

What is not done to the text

ICD-11 is licensed under CC BY-ND 3.0 IGO — a no-derivatives licence. Definitions, inclusions, exclusions and coding notes are reproduced verbatim. They are never reworded, shortened, summarised, or rewritten, by a person or by software.

Every page links back to the corresponding entity in the official WHO browser so any entry here can be checked against the source.

What this site adds

Navigation and presentation only: a browsable hierarchy, cross-links between related codes, exclusion links resolved to their target codes, and code search. The classification content itself is unchanged WHO material.

Not medical advice, and not reviewed

This is a reference copy of a statistical classification. It is not medical advice, it has not been reviewed by a clinician, and it must not be used to diagnose or treat anyone. For coding decisions, consult the official WHO release and your national coding guidelines, which may differ from the international version.

Corrections

Errors in the classification itself belong to WHO and should be raised through their proposal process. If a page here misrepresents the source data, please get in touch.