Table 5. International Classification of Disease, Ninth Revision (ICD-9) codes and the Clinical Classifications Software (CCS) codes used to identify co-morbidities, in-hospital procedures and complications.

Abbreviations: ICD‐9‐CM= International Classification of Diseases, Ninth Revision, Clinical Modification; CCS= Clinical Classification Software.

Risk Factors/ Co-morbidity	Source	Codes
Acute ischemic stroke	ICD-9	433.01, 433.10, 433.11, 433.21, 433.31, 433.81, 433.91, 434.00, 434.01, 434.11, 434.91, 436
Cocaine	ICD - 9	304.20, 304.21, 304.22, 305.60  305.61, 305.62
Acute myocardial infarction	CCS	100
Peri-; endo-; and myocarditis, cardiomyopathy	CCS	97
Sudden cardiac death	ICD - 9	V12.53
Arrhythmias	ICD - 9	427.9
Supraventricular premature beats	ICD - 9	427.61
Tachycardia, unspecified	ICD - 9	785.0
Elevated blood pressure reading without diagnosis of hypertension	ICD - 9	796.2
Rhabdomyolysis	ICD - 9	728.88
Acute and unspecified renal failure	CCS	157
Bronchiolitis Obliterans organizing pneumonia	ICD - 9	516.8
Pleurisy; pneumothorax; pulmonary collapse	CCS	130
Epilepsy	CCS	83
Drug induced headache, not elsewhere classified	ICD - 9	339.3
Family Hx Stroke (cerebrovascular)	ICD - 9	V17.1
Acute vascular insufficiency of intestine	ICD – 9	557.0
Aortic and peripheral arterial embolism or thrombosis	CCS	116
Unspecified venous complication	ICD – 9	671.9
Venous thrombosis and embolism	ICD - 9	V12.51
Connective tissue diseases	CCS	210
Vasculitis	ICD - 9	447.6; 446.0–446.9
Meningitis	CCS	76
Cardiac and circulatory anomalies	CCS	213
Elevated cholesterol and lipids	CCS	53
Migraine	CCS	84
Sickle cell disease	CCS	61
Viral infection	CCS	7
Heart valve disorder	CCS	96
Atherosclerosis	CCS	114
Acute but ill-defined cerebrovascular disease	CCS	109
Transient ischemic attack	CCS	112
Oral contraceptive use	CCS	176