To examine validity of the International Classification of Diseases, 9th Edition, Clinical Modification (ICD-9-CM) codes in discharge data for identifying infants with cardiac defects according to ...

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 ...