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2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Circulatory System 390-459 > Chronic Rheumatic Heart Disease 393-398 > ICD-9-CM Diagnosis 397 Diseases of other endocardial structures 397 is a non-specific code that cannot be used to specify a diagnosis ICD-9-CM Diagnosis 397.0 Diseases of tricuspid valve Backflow of blood from the right ventricle into the right atrium, owing to imperfect functioning of the tricuspid valve. The pathologic narrowing of the orifice of the tricuspid valve. (Stedman, 25th ed) 397.0 is a specific code that can be used to specify a diagnosis 397.0 contains 7 index entries ICD-9-CM Diagnosis 397.1 Rheumatic diseases of pulmonary valve 397.1 is a specific code that can be used to specify a diagnosis 397.1 contains 3 index entries ICD-9-CM Diagnosis 397.9 Rheumatic diseases of endocardium valve unspecified 397.9 is a specific code that can be used to specify a diagnosis 397.9 contains 4 index entries