Cumulative Official WHO Updates to ICD 10 - 1996 - 2001

Example 45: I (a) Epileptic attack (b) Chronic alcoholism ... subcategories at B20-B23 are the only optional four-character codes for countries using the four-character version of ICD-10. These four-character subcategories are provided for use where it is not possible or not desired to use multiple-cause coding. ... I13.2 (Hypertensive heart ... ................
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