ICD-11 is organized into two Code Systems. The WHOFIC Foundation serves as the underlying terminology, offering more detail than the statistical classification and including additional entities from other WHO Family of International Classifications, such as the ICF.

By contrast, ICD-11 for Mortality and Morbidity Statistics (MMS) is the statistical classification and the primary focus of this page. For users interested in ICD-11 codes and categories, ICD-11 MMS is the appropriate Code System to use.

The International Classification of Diseases, 11th Revision, Mortality and Morbidity Statistics (MMS) is a linearization - a structured subset derived from the WHOFIC Foundation for specific use cases. ICD-11 MMS is the principal linearization that contains 28 top-level chapters covering the full range of diseases, disorders, injuries, and related health conditions in addition to extension codes to support postcoordination. It can be accessed and downloaded in print or electronic (spreadsheet) format through the ICD-11 browser. The content can also be accessed programmatically through the ICD-API, which includes preliminary support for FHIR (Fast Healthcare Interoperability Resources) in its pre-release state.

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The WHO grants a license for "commercial and non-commercial use" of ICD-11 CC BY-ND 3.0 IGO Detailed information can be found here: https://icd.who.int/en/docs/icd11-license.pdf Contact licensing@who.int to obtain further information.

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