Validation of an algorithm identifying incident primary immune thrombocytopenia in the French national health insurance database.

Objectives: To evaluate the accuracy of an algorithm identifying newly diagnosed immune thrombocytopenia (ITP) patients in the French national health insurance database (SNIIRAM).

Methods: The source of data was the SNIIRAM of Midi-Pyrenees region (southwest of France, three million inhabitants). Data of patients with at least one ITP code (D69.