ICD is the International Classification of Diseases, a numerical classification system

ICD is the International Classification of Diseases, a numerical classification system is the classification used to code health conditions and related information. The ICD is copyrighted by the World Health Organization (WHO), which owns and publishes the classification. The ICD has been revised periodically to incorporate changes in the medical field. The current version is ICD10, but ICD9 is still in use and ICD11 is in development.