2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Circulatory System 390-459 > Other Forms Of Heart Disease 420-429 > Cardiomyopathy 425.* > 2006 ICD-9-CM Diagnosis 425.1 Hypertrophic obstructive cardiomyopathy View the most recent version of ICD-9-CM 425.1 A form of CARDIAC MUSCLE disease, characterized by left and/or right ventricular hypertrophy (HYPERTROPHY, LEFT VENTRICULAR; HYPERTROPHY, RIGHT VENTRICULAR), frequent asymmetrical involvement of the HEART SEPTUM, and normal or reduced left ventricular volume. Risk factors include HYPERTENSION; AORTIC STENOSIS; and gene MUTATION (FAMILIAL HYPERTROPHIC CARDIOMYOPATHY). 425.1 is a specific code that can be used to specify a diagnosis 425.1 contains 8 index entries View the ICD-9-CM Volume 1 425.* hierarchy Alternate Terminology Hypertrophic subaortic stenosis (idiopathic)  Index entries containing 425.1: Cardiomyopathy (congestive) (constrictive) (familial) (infiltrative) (obstructive) (restrictive) (sporadic) 425.4 hypertrophic obstructive 425.1 congenital 746.84 Hypertrophy, hypertrophic subaortic stenosis (idiopathic) 425.1 Myocardiopathy (congestive) (constrictive) (familial) (hypertrophic nonobstructive) (idiopathic) (infiltrative) (obstructive) (primary) (restrictive) (sporadic) 425.4 hypertrophic obstructive 425.1 Stenosis (cicatricial) - see also Stricture hypertrophic subaortic (idiopathic) 425.1 myocardium, myocardial (see also Degeneration, myocardial) 429.1 hypertrophic subaortic (idiopathic) 425.1 subaortic 746.81 hypertrophic (idiopathic) 425.1 Stricture (see also Stenosis) 799.89 myocardium, myocardial (see also Degeneration, myocardial 429.1 hypertrophic subaortic (idiopathic) 425.1 subaortic 746.81 hypertrophic (acquired) (idiopathic) 425.1