Skip to content

International classifications of diseases, Tenth Revision - ICD10 for mortality

Understanding the changes to mortality statistics following the move to coding cause of death to ICD-10

From January 2001 information on cause of death in England and Wales has been coded to the Tenth Revision of the International Classification of Diseases (ICD-10). ICD-10 has been implemented on the recommendation of the World Health Organisation (WHO) and replaces ICD-9, which has been in use since 1979.

ICD-10 more closely reflects current medical knowledge than ICD-9. It is the most radical change in the ICD for 50 years. This will impact on mortality statistics by cause of death, with a discontinuity in the trends for some causes of death. To help users understand these discontinuities, the Office for National Statistics has carried out a comprehensive study to analyse the changes in mortality statistics which are due to the change in classification. Some other countries have also carried out bridge coding studies when they have moved to ICD-10.

Statistics using ICD-10 to code cause of death will be published for England and Wales for 2001 onwards.

Content from the Office for National Statistics.
© Crown Copyright applies unless otherwise stated.