2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Circulatory System 390-459 > Other Forms Of Heart Disease 420-429 > ICD-9-CM Diagnosis 424 Other diseases of endocardium 424 is a non-specific code that cannot be used to specify a diagnosis ICD-9-CM Diagnosis 424.0 Mitral valve disorders 424.0 is a specific code that can be used to specify a diagnosis 424.0 contains 22 index entries ICD-9-CM Diagnosis 424.1 Aortic valve disorders 424.1 is a specific code that can be used to specify a diagnosis 424.1 contains 29 index entries ICD-9-CM Diagnosis 424.2 Tricuspid valve disorders specified as nonrheumatic 424.2 is a specific code that can be used to specify a diagnosis 424.2 contains 8 index entries ICD-9-CM Diagnosis 424.3 Pulmonary valve disorders Backflow of blood from the pulmonary artery into the right ventricle, owing to imperfect functioning of the pulmonary valve. 424.3 is a specific code that can be used to specify a diagnosis 424.3 contains 21 index entries ICD-9-CM Diagnosis 424.9 Endocarditis valve unspecified 424.9 is a non-specific code that cannot be used to specify a diagnosis ICD-9-CM Diagnosis 424.90 Endocarditis valve unspecified unspecified cause Exudative and proliferative inflammatory alterations of the endocardium, characterized by the presence of vegetations on the surface of the endocardium or in the endocardium itself, and most commonly involving a heart valve, but sometimes affecting the inner lining of the cardiac chambers or the endocardium elsewhere. It may occur as a primary disorder or as a complication of or in association with another disease. 424.90 is a specific code that can be used to specify a diagnosis 424.90 contains 18 index entries ICD-9-CM Diagnosis 424.91 Endocarditis in diseases classified elsewhere 424.91 is a specific code that can be used to specify a diagnosis 424.91 contains 14 index entries ICD-9-CM Diagnosis 424.99 Other endocarditis valve unspecified 424.99 is a specific code that can be used to specify a diagnosis 424.99 contains 7 index entries