Cumulative Official WHO Updates to ICD 10 - 1996 - 2001

ICD-O-2 Conversion Flag NAACCR Version 11.1 Item 1980, column 1147. This field identifies the origin of any ICD O 2 codes in a case record. Now that ICD O 3 coding is firmly established, it is possible that the ICD O 2 codes required for pre-2001 diagnoses are produced from the automatic conversion of ICD O 3 codes. ................
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