Acute and subacute infective endocarditis in diseases classified elsewhere

This code signifies inflammation of the inner lining of the heart (endocardium) and heart valves due to an infection, occurring acutely or subacutely, when the underlying disease causing the endocarditis is classified to another ICD-9-CM category. It specifically points to infective endocarditis that is a manifestation of another primary condition.

Use this code when documentation clearly indicates acute or subacute infective endocarditis as a complication or manifestation of a separate, primary disease process, such as a systemic infection or a specific underlying medical condition. The medical record should explicitly link the endocarditis to another classified disease.

• Always sequence the underlying disease first, followed by this code, as it represents a manifestation.
• Do not use this code for infective endocarditis where the underlying cause is not specified as being classified elsewhere.
• Ensure documentation specifies "acute" or "subacute" and clearly identifies the primary disease causing the endocarditis.