This study determined that ICD-9 codes 433.X1, 434.XX, and V12.54 had positive predictive values >90%, and may be used to focus care on stroke patients.

Diabetes included both type I and type II and was defined as any occurrence of International Classification of Diseases, Ninth Edition (ICD-9) diagnosis codes 250.xx, 357.2, 362.0x, or 366.41 ...

Objectives: We sought to determine which ICD-9-CM codes in Medicare Part A data identify cardiovascular and stroke risk factors. Design and Participants: This was a cross-sectional study comparing ICD ...

Third, we excluded gender minority–related ICD-9 codes from mental health care use measures, although these claims may represent a mental health visit and are not always captured with another ...