Validation of <scp>ICD</scp>‐10 hospital discharge diagnosis codes to identify incident and recurrent ischemic stroke from a <scp>US</scp> integrated healthcare system

Abstract

The ICD-10 hospital discharge diagnosis codes for ischemic stroke showed a high PPV for incident cases, while the PPV for recurrent cases were less optimal. Algorithms to improve the accuracy of ICD-10 codes for recurrent ischemic stroke may be necessary.