Icd-9

ICD-9

ICD-9 (International Classification of Diseases, Ninth Revision), pronounced as /aɪ siː diː naɪn/, is a system of medical classification used by healthcare professionals worldwide to code and classify diseases, symptoms, abnormal findings, complaints, and external causes of injury and diseases. The ICD-9 was developed by the World Health Organization (WHO) and was in use until it was superseded by the ICD-10 in 1994.

Etymology

The term ICD-9 is an abbreviation of International Classification of Diseases, Ninth Revision. The term reflects the purpose of the system (to classify diseases internationally) and its version number (9).

Related Terms

• ICD-10: The tenth revision of the International Classification of Diseases, which replaced ICD-9.
• ICD-11: The eleventh and current revision of the International Classification of Diseases.
• World Health Organization: The international body responsible for the creation and maintenance of the ICD system.
• Medical classification: A system of categories to which medical diagnoses or other health-related entities are assigned based on common characteristics.
• Disease: A particular abnormal condition that negatively affects the structure or function of all or part of an organism, and that is not due to any immediate external injury.
• Symptom: A physical or mental feature which is regarded as indicating a condition of disease, particularly such a feature that is apparent to the patient.

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