Table 1.

Claims-Based Definitions of Variables using Medicaid Analytic eXtract data; 2005–2010

Variable	Dataset	Definition
Inpatient Visit	Inpatient File	Any Event within file
Outpatient Visit	Other Services File	Event labeled Physician, Other Practitioner, Outpatient hospital, Clinic (Other categories such as dental, laboratory, home health excluded)
Transcranial Doppler	Other Services File	HCPCS* Codes: 93886, 93888, 93890, 93892, 93893
Blood Transfusion	Other Services File	HCPCS Codes: 09883, 36455, 86999, S3906, S9538, 09882, 36430
Well-Child Visit	Other Services File	HCPCS Codes: 99381–5; 99391–5; 99432, 83655
Emergency Department Visit	Other Services File	ICD-9 Codes: V202, V700, V703, V705–9
Sickle Cell Disease-related Healthcare	Inpatient and Other Services File	Place of Service: Emergency Department
Sickle Cell Anemia	Inpatient and Other Services File	ICD-9 Codes: 282.61, 282.61

^*HCPCS: Healthcare Common Procedure Coding System, a set of procedure codes based on the Current Procedural Terminology (CPT) from the American Medical Association