Algorithms for identification of Guillain-Barré Syndrome among adolescents in claims databases

► We examine algorithms that improve identification of true GBS cases in claims data. ► Only 29% of patients with ICD-9 code 357.0 were confirmed cases of GBS. ► Inpatient GBS code (primary position) and neurology visit gave highest PPV (70%). ► Leading algorithm performs similarly in 4 different claims environments.