2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Circulatory System 390-459 > Chronic Rheumatic Heart Disease 393-398 > 2006 ICD-9-CM Diagnosis 394 Diseases of mitral valve View the most recent version of ICD-9-CM 394 394 is a non-specific code that cannot be used to specify a diagnosis 394 Excludes that with aortic valve involvement (396.0-396.9)