ICD-10 Code I05.8 – Other rheumatic mitral valve diseases (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I05.8 – Other rheumatic mitral valve diseases
What it is
I05.8 identifies rheumatic mitral valve disease that does not fit a more specific category. Use it when the documentation confirms a rheumatic cause involving the mitral valve, but the exact lesion is not otherwise specified.
Clinical signs
Clinical features vary; refer to documentation. Findings may include signs of mitral valve dysfunction such as a murmur, dyspnea, palpitations, or evidence of prior rheumatic heart disease.
When to use this code
Use this code when the provider documents other rheumatic mitral valve disease and does not name stenosis, insufficiency, or another more specific mitral lesion. It also applies when the chart confirms rheumatic mitral involvement but the precise abnormality is not stated. Check documentation.
Do not use for
Do not use I05.8 for nonrheumatic mitral valve disorders or for rheumatic mitral stenosis or insufficiency when those are specifically documented. If the diagnosis is unclear, verify the record before coding.
Coding tip
Code the most specific rheumatic mitral valve diagnosis available, and query the provider if the record only says “mitral valve disease.”