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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 > 2008 ICD-9-CM Diagnosis 423 Other diseases of pericardium 423 is a non-specific code that cannot be used to specify a diagnosis 423 excludes: that specified as rheumatic (393)