ICD-9 codes 433.X1, 434, and V12.54 demonstrated high PPVs for identifying confirmed cerebral events across care settings. Codes recorded in both inpatient and outpatient settings had higher PPVs but ...
The number of diagnosis codes has expanded from 13,000 ICD-9 codes to 68,000 ICD-10 codes, with 78 percent of ICD-9 diagnosis codes mapping 1-to-1 with an ICD-10 code, either exactly or approximately.
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