ICD-10 Chapter XXII: Codes for special purposes

The International Statistical Classification of Diseases and Related Health Problems (ICD -10) classified in Chapter XXII of the last internationally as amended ( WHO 2006 ) certain - not contained in the other chapters - states the following key.

U00 - U49 Preliminary assignments for diseases with unknown etiology

U80 - U85 pathogens with resistance to certain antibiotics or chemotherapeutic agents

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