2006 ICD-9-CM Volume 1 Diagnosis Codes > Diseases Of The Circulatory System 390-459 > Other Forms Of Heart Disease 420-429 > 420 Acute pericarditis 421 Acute and subacute endocarditis 422 Acute myocarditis 423 Other diseases of pericardium 424 Other diseases of endocardium 425 Cardiomyopathy 426 Conduction disorders 427 Cardiac dysrhythmias 428 Heart failure 429 Ill-defined descriptions and complications of heart disease