Table 1.

Causes of cardiovascular hospitalization and the corresponding ICD-9 diagnostic codes

Cause of cardiovascular hospitalization	ICD-9 code
All-cause cardiovascular disease	390.x–459.x
Atrial fibrillation/flutter	427.31, 427.32
Rheumatic heart disease	391.x, 393.x–398.x
Hypertensive disease	401.x–405.x, 437.2
Coronary heart disease (acute myocardial infarction, acute/sub-acute coronary syndrome, and angina pectoris)	410.x–414.x
Pulmonary circulatory disease	415.x–417.x
Other forms of heart disease (acute pericarditis, acute/sub-acute endocarditis, acute myocarditis, other diseases of pericardium, other diseases of endocardium, cardiomyopathy, conduction disorders, cardiac dysrhythmias, and ventricular arrhythmia or cardiac arrest)	420.x–429.x
Heart failure	398.91, 428.x
Cerebrovascular disease	430.x–438.x
Diseases of the arteries, arterioles, and capillaries (including atherosclerosis)	440.x–448.x
Diseases of the veins and lymphatics, and other disease of the circulatory system (including phlebitis, thrombophlebitis, and portal vein thrombosis)	451.x–459.x

Abbreviation: ICD-9, International Classification of Diseases, Ninth Revision.