In short: ICD-11 replaced ICD-10 as the WHO's international classification of diseases on 1 January 2022, and many countries are now moving their records and reports across. This converter looks up an ICD-10 code in the WHO mapping tables and shows the ICD-11 code, its title and whether the match is exact, split into several codes or only partial.
WHO mapping tables
Uses the ICD-10 to ICD-11 mapping tables published by the World Health Organization, unchanged.
The type of match
Exact, several ICD-11 codes, or partial, so you know when a code needs a closer look.
Lists and API
Whole code lists with a free account, and a FHIR $translate API for developers.
How to use it
- Type an ICD-10 code, for example
J45.9orE11.9. The dot is optional. - Press Convert. You see the ICD-11 code, its official title, a link to it in the WHO browser and the type of match. When there are several ICD-11 codes, all of them are shown: the right one is chosen by a coder or clinician from the patient's record.
- For a list of codes, create a free account and upload the list. For software, use the FHIR
$translateoperation on Anpheros Platform.
What the type of match means
| Match | What it means | What to do |
|---|---|---|
| Exact | One ICD-10 code corresponds to one ICD-11 code | Use the ICD-11 code |
| Several ICD-11 codes | ICD-11 splits the ICD-10 category into more detailed codes | A coder or clinician chooses from the record |
| Partial | The ICD-11 code covers only part of the ICD-10 meaning | A coder or clinician checks the record |
| No direct match | The concept is classified differently in ICD-11 | Code it again from the ICD-11 browser |
Why ICD-10 and ICD-11 codes do not always line up
ICD-11 is not a renumbered ICD-10. Its codes have a different structure (for example CA23 instead of J45), many categories are more detailed, and some conditions moved to new chapters, such as sleep-wake disorders and conditions related to sexual health. ICD-11 also lets coders combine a stem code with extension codes for details like severity or the affected side. So one ICD-10 code can map to one ICD-11 code, to several, or only partly. The WHO tables record which case applies.
International Classification of Diseases, Eleventh Revision (ICD-11), World Health Organization (WHO) 2019 https://icd.who.int/browse11. Licensed under the Creative Commons Attribution-NoDerivatives 3.0 IGO licence (CC BY-ND 3.0 IGO). Anpheros is not affiliated with or endorsed by WHO.
Frequently asked questions
Is the ICD-10 to ICD-11 converter free?
Yes. Looking up single codes is free and needs no account. Converting a whole list of codes needs a free Anpheros Platform account.
Where do the mappings come from?
From the ICD-10 to ICD-11 mapping tables published by the World Health Organization, shown unchanged, with the release of the tables. ICD-11 titles in your language come from the official WHO translations where they exist; otherwise the official English title is shown. Anpheros is not affiliated with or endorsed by WHO.
Can I use the result directly for billing or official reporting?
Use it as a starting point. National rules decide which version of ICD is used for billing and reporting, and when a match is partial or split into several codes, a coder should choose the final code from the full clinical record.
Is there an API for ICD-10 to ICD-11 conversion?
Yes. Anpheros Platform offers the conversion as the FHIR ConceptMap/$translate operation, with a free sandbox for developers.
