2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Circulatory System 390-459 > Other Forms Of Heart Disease 420-429 > Acute Pericarditis 420.* > 2006 ICD-9-CM Diagnosis 420.90 Acute pericarditis unspecified View the most recent version of ICD-9-CM 420.90 Inflammation of the pericardium. 420.90 is a specific code that can be used to specify a diagnosis 420.90 contains 12 index entries View the ICD-9-CM Volume 1 420.* hierarchy Alternate Terminology Pericarditis (acute): NOS infective NOS sicca  Index entries containing 420.90: Chylopericardium (acute) 420.90 Effusion pericardium, pericardial (see also Pericarditis) 423.9 acute 420.90 Mediastinopericarditis (see also Pericarditis) 423.9 acute 420.90 Pericarditis (granular) (with decompensation) (with effusion) 423.9 acute (nonrheumatic) 420.90 with chorea (acute) (rheumatic) (Sydenham's) 392.0 bacterial 420.99 benign 420.91 hemorrhagic 420.90 idiopathic 420.91 infective 420.90 nonspecific 420.91 rheumatic 391.0 with chorea (acute) (rheumatic) (Sydenham's) 392.0 sicca 420.90 viral 420.91 cholesterol (chronic) 423.8 acute 420.90 infective (acute) 420.90 neoplastic (chronic) 423.8 acute 420.90 Pleuropericarditis (see also Pericarditis) 423.9 acute 420.90 Pneumopericarditis (see also Pericarditis) 423.9 acute 420.90