# icd 9

## ICD-9

The ninth revision of a system of coding of diseases, signs, symptoms, abnormal findings, complaints, social circumstances, and external causes of injury or diseases, as classified by the World Health Organization (WHO).

#### Notes

* *ICD-9* is an abbreviation for The International Classification of Diseases, 9th Revision.
* *ICD-9* was replaced by ICD-10.

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