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Positive predictive value (PPV) for the ICD-9-CM code for identifying outpatients diagnosed with ITP by hematologists
| Hematologist-specific PPV | |||
|---|---|---|---|
| Patients | Outpatients billed for ICD-9-CM code by hematologists | PPV | |
| All patients | Patients with a definite diagnosis of ITP |
||
| Children | 300 | 215 | 0.72 |
| Adults | 140 | 97 | 0.69 |
| Overall PPV | |||
|
Outpatients billed for ICD-9-CM code by hematologists or non-hematologists |
|||
| Children & Adults | 548 | 356 | 0.65 |
