ICD-10 Code I09 – Other rheumatic heart diseases (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I09 – Other rheumatic heart diseases
What it is
I09 is a category for rheumatic heart disease that does not fit the more specific valve codes. It identifies chronic heart damage linked to prior rheumatic fever when documentation is nonspecific or broader than a single valve lesion.
Clinical signs
Clinical features vary; refer to documentation. Common references include a history of rheumatic fever, cardiac murmurs, valve deformity, or chronic valvular dysfunction noted on exam or imaging.
When to use this code
Use I09 when the record states other or unspecified rheumatic heart disease and does not identify a more specific rheumatic valve disorder. It may fit legacy problem lists, summary diagnoses, or follow-up notes describing chronic rheumatic cardiac involvement. If a specific valve lesion is documented, code that condition instead.
Do not use for
Do not use I09 for acute rheumatic fever without chronic heart disease. Do not use it when documentation supports a more specific rheumatic valve code or a nonrheumatic cardiac disorder.
Coding tip
Check the chart for the exact valve and whether the provider documents rheumatic heart disease, because specificity often changes the correct code.