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2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Circulatory System 390-459 > Other Forms Of Heart Disease 420-429 > Ill-Defined Descriptions And Complications Of Heart Disease 429.* > 2008 ICD-9-CM Diagnosis 429.8 Other ill-defined heart diseases  On October 1, 2008 the 2009 ICD-9-CM codes came into effect. Therefore, this code may be out of date. The 2009 version of ICD-9-CM 429.8 can be accessed here. 429.8 is a non-specific code that cannot be used to specify a diagnosis View the ICD-9-CM Volume 1 429.* hierarchy