2006 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.* > 2006 ICD-9-CM Diagnosis 421.1 Acute and subacute infective endocarditis in diseases classified elsewhere View the most recent version of ICD-9-CM 421.1 421.1 is a specific code that can be used to specify a diagnosis 421.1 contains 6 index entries View the ICD-9-CM Volume 1 421.* hierarchy Code first underlying disease, as: blastomycosis (116.0) Q fever (083.0) typhoid (fever) (002.0) 421.1 Excludes endocarditis (in): Coxsackie (virus) (074.22) gonococcal (098.84) histoplasmosis (115.0-115.9 with fifth-digit 4) meningococcal infection (036.42) monilial (112.81)  Index entries containing 421.1: Endocarditis (chronic) (indeterminate) (interstitial) (marantis) (nonbacterial thrombotic) (residual) (sclerotic) (sclerous) (senile) (valvular) 424.90 blastomycotic 116.0 [421.1] due to blastomycosis 116.0 [421.1] Q fever 083.0 [421.1] typhoid (fever) 002.0 [421.1] typhoid 002.0 [421.1] Typhoid (abortive) (ambulant) (any site) (fever) (hemorrhagic) (infection) (intermittent) (malignant) (rheumatic) 002.0 endocarditis 002.0 [421.1]