ICD-10 Code I08 – Multiple valve diseases (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I08 – Multiple valve diseases
What it is
I08 identifies disease involving more than one heart valve at the same time. It is used when documentation shows combined valvular disorders rather than a single isolated valve problem.
Clinical signs
Clinical features vary; refer to documentation. Patients may have a cardiac murmur, shortness of breath, fatigue, palpitations, or signs of heart failure, depending on which valves are affected and how severe the disease is.
When to use this code
Use I08 when the record clearly states multiple valve disease, combined valvular disease, or involvement of more than one valve. It is appropriate when the provider documents a single diagnosis covering two or more affected valves. Check documentation if the note names only one valve or gives separate valve disorders.
Do not use for
Do not use I08 for isolated disease of a single valve, unless the chart also supports multiple valve involvement. If the documentation is unclear, check documentation rather than assuming combined disease.
Coding tip
Verify that the provider documents more than one valve before assigning I08.