ICD-10

International Classification of Diseases 10th Edition

ICD-10 is an international code system for diagnoses, published by the World Health Organization. It is used worldwide, but most nations have implemented their own modification of the original ICD-10 system. We support both the version published by WHO and the modifications of each country.

Overview

• Around 11,000 assignable codes in the version published by WHO.
• Most countries publish national modifications of ICD-10. Some modifications, such as the British, have a large overlap with the international version. Other countries, such as the US, have little overlap.
• Only conditions that affect patient care should be coded.
• The rules for ICD-10 coding are different for inpatient and outpatient settings. In outpatient, only established diagnoses should be coded, while in inpatient, uncertain and ruled-out conditions should be coded. We, therefore, require the user to specify the setting.

National extensions

Many countries publish national adaptations of ICD-10 that add country-specific codes or additional granularity beyond the international edition. National extensions are supported as separate coding system identifiers:

Extension	Country	Status
ICD-10	International
ICD-10-CM	USA
NHS ICD-10	United Kingdom
CIM-10-FR	France
ICD-10-GM	Germany
ICD-10-AM	Australia
ICD-10-CA	Canada
SKS ICD-10	Denmark
ICD-10-NL	Netherlands
ICD-10-NO	Norway
CIE-10-ES	Spain
ICD-10-SE	Sweden
ICD-10-GM	Switzerland

When enabled, the system field accepts the relevant ICD-10 identifier with an encounter-type suffix (e.g., icd10int-inpatient, icd10gm-inpatient, cim10fr-outpatient).