421 Acute and subacute endocarditis convert 421 to ICD-10
421.0 Acute and subacute bacterial endocarditis convert 421.0 to ICD-10
421.1 Acute and subacute infective endocarditis in diseases classified elsewhere convert 421.1 to ICD-10
421.9 Acute endocarditis, unspecified convert 421.9 to ICD-10