ICD-10-CM > I00-I99 > I30-I5A > I33 > I33.9 I33.9 Acute and subacute endocarditis, unspecified Billable/Specific Copy Code Copy Description Applicable To Acute endocarditis NOSAcute myoendocarditis NOSAcute periendocarditis NOSSubacute endocarditis NOSSubacute myoendocarditis NOSSubacute periendocarditis NOS