ICD-10 Code I06.9 – Rheumatic aortic valve disease, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I06.9 – Rheumatic aortic valve disease, unspecified
What it is
I06.9 identifies rheumatic disease affecting the aortic valve when the record does not specify the exact lesion. It is used for aortic valve damage linked to prior rheumatic fever or rheumatic heart disease.
Clinical signs
Clinical features vary; refer to documentation. Common findings in rheumatic aortic valve disease may include a heart murmur, evidence of aortic valve dysfunction, and a history consistent with rheumatic heart disease.
When to use this code
Use I06.9 when the provider documents rheumatic aortic valve disease but does not name stenosis, insufficiency, or another specific aortic valve lesion. It also fits when the chart confirms rheumatic involvement of the aortic valve, yet details are incomplete. Check documentation if the note is ambiguous.
Do not use for
Do not use this code for nonrheumatic aortic valve disorders or for aortic valve disease with a clearly specified rheumatic lesion. If the record identifies another valvular diagnosis, code that condition instead.
Coding tip
Query the provider when the note says “rheumatic aortic valve disease” but does not clarify the valve lesion or whether the condition is rheumatic.