ICD-10 Code I05.2 – Rheumatic mitral stenosis with insufficiency (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I05.2 – Rheumatic mitral stenosis with insufficiency
What it is
This code identifies rheumatic heart disease affecting the mitral valve with both narrowing and leakage. Use it when the record shows rheumatic mitral stenosis with mitral insufficiency.
Clinical signs
Common findings include a history of rheumatic valve disease, a diastolic murmur from stenosis, and a systolic murmur from regurgitation. Clinical features vary; refer to documentation.
When to use this code
Use I05.2 when the provider documents rheumatic mitral stenosis with insufficiency, mixed mitral valve disease, or equivalent wording tied to rheumatic etiology. You should confirm the valve involved is the mitral valve and that both stenosis and insufficiency are present. If the note only says mitral stenosis or nonrheumatic disease, check documentation.
Do not use for
Do not assign this code for isolated mitral stenosis, isolated mitral regurgitation, or nonrheumatic mitral valve disorders. Check documentation if the valve lesion is congenital, degenerative, or unspecified.
Coding tip
Confirm both components and the rheumatic cause before coding; mixed valve disease wording can be easy to miss.