Rheumatic diseases of endocardium, valve unspecified

This code signifies a rheumatic process affecting the inner lining of the heart, specifically when the involved heart valve is not specified. It indicates a sequela of rheumatic fever impacting the endocardium and valvular structures without further detail on the specific valve.

Use this code when documentation clearly links endocardial or valvular disease to a history of rheumatic fever, but the specific valve (e.g., mitral, aortic) is not identified. This applies to chronic conditions resulting from rheumatic heart disease where the precise valve involvement is either unknown or not documented.

• Do not use this code if the specific valve affected by rheumatic disease is known; instead, use a more precise code from the I05-I08 series.
• Distinguish carefully from non-rheumatic endocarditis; the "Excludes1" note for I38 is crucial here.
• Ensure documentation explicitly states a rheumatic etiology for the endocardial/valvular involvement.