ICD-10-CM > I00-I99 > I05-I09 > I09 > I09.1 I09.1 Rheumatic diseases of endocardium, valve unspecified Billable/Specific Copy Code Copy Description Applicable To Rheumatic endocarditis (chronic)Rheumatic valvulitis (chronic) Type 1 Excludes endocarditis, valve unspecified (I38)