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 ...

Instruction can be found in Section II of the 2021 ICD-10-CM Official Guidelines for Coding and Reporting for "Selection of Principal Diagnosis." Q: When two conditions are both present on admission, ...