ICD-10 Code I09.8 – Other specified rheumatic heart diseases (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I09.8 – Other specified rheumatic heart diseases
What it is
This code identifies rheumatic heart disease that does not fit a more specific ICD-10 category. Use it for documented rheumatic valvular or cardiac involvement when the record names another specified form.
Clinical signs
Clinical features vary; refer to documentation. Findings may reflect chronic rheumatic cardiac damage, such as valvular disease or murmurs, but the exact pattern should be stated by the clinician.
When to use this code
Use I09.8 when the provider documents a specific rheumatic heart disease that is not otherwise classified in ICD-10-CM. It is appropriate when the diagnosis clearly indicates rheumatic cardiac involvement, but a more precise code is unavailable or not applicable. Check documentation if the record is vague.
Do not use for
Do not use this code for rheumatic fever without heart involvement or for nonrheumatic valvular disease. If the chart does not clearly support rheumatic heart disease, check documentation before assigning I09.8.
Coding tip
Code only when the provider links the heart disease to rheumatic origin and specifies that it is “other” or otherwise not classifiable.