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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 > Acute And Subacute Endocarditis 421.* > 2008 ICD-9-CM Diagnosis 421.0 Acute and subacute bacterial endocarditis  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 Therefore, this code may be out of date.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 421.0 can be accessed here. Infection of the endocardium caused by species of STREPTOCOCCUS. This condition does not produce metastatic foci and if untreated may take up to a year to be fatal. 421.0 is a specific code that can be used to specify a diagnosis 421.0 contains 30 index entries View the ICD-9-CM Volume 1 421.* hierarchy 421.0 also known as: Endocarditis (acute) (chronic) (subacute): bacterial infective NOS lenta malignant purulent septic ulcerative vegetative Infective aneurysm Subacute bacterial endocarditis [SBE] Use additional code, if desired, to identify infectious organism [e.g., Streptococcus 041.0, Staphylococcus 041.1] Index entries containing 421.0: Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (ruptured) (saccular) (varicose) 442.9 brain 437.3 mycotic 421.0 ruptured (see also Hemorrhage, subarachnoid) 430 endocardial, infective (any valve) 421.0 infective (any valve) 421.0 mycotic, any site 421.0 without endocarditis - see Aneurysm, by site ruptured, brain (see also Hemorrhage, subarachnoid) 430 Endocarditis (chronic) (indeterminate) (interstitial) (marantis) (nonbacterial thrombotic) (residual) (sclerotic) (sclerous) (senile) (valvular) 424.90 aortic (heart) (nonrheumatic) (valve) 424.1 with mitral (valve) disease 396.9 active or acute 391.1 bacterial 421.0 bacterial (acute) (any valve) (chronic) (subacute) 421.0 constrictive 421.0 due to serratia marcescens 421.0 infectious or infective (acute) (any valve) (chronic) (subacute) 421.0 lenta (acute) (any valve) (chronic) (subacute) 421.0 Loeffler's (parietal fibroplastic) 421.0 malignant (acute) (any valve) (chronic) (subacute) 421.0 mitral (chronic) (double) (fibroid) (heart) (inactive) (valve) (with chorea) 394.9 active or acute 391.1 bacterial 421.0 mycotic (acute) (any valve) (chronic) (subacute) 421.0 pneumococcic (acute) (any valve) (chronic) (subacute) 421.0 purulent (acute) (any valve) (chronic) (subacute) 421.0 septic (acute) (any valve) (chronic) (subacute) 421.0 streptococcal (acute) (any valve) (chronic) (subacute) 421.0 suppurative (any valve) (acute) (chronic) (subacute) 421.0 ulcerative (acute) (any valve) (chronic) (subacute) 421.0 vegetative (acute) (any valve) (chronic) (subacute) 421.0 Infection, infected, infective (opportunistic) 136.9 endocardium (see also Endocarditis) 421.0 Löffler's endocarditis 421.0 Node(s) - see also Nodules Osler's 421.0 Osler's nodes 421.0 SBE (subacute bacterial endocarditis) 421.0 Ulcer, ulcerated, ulcerating, ulceration, ulcerative 707.9 endocarditis (any valve) (acute) (chronic) (subacute) 421.0 valve, heart 421.0 Vegetation, vegetative endocarditis (acute) (any valve) (chronic) (subacute) 421.0 heart (mycotic) (valve) 421.0