ICD-10 Code I08.1 – Rheumatic disorders of both mitral and tricuspid valves (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I08.1 – Rheumatic disorders of both mitral and tricuspid valves
What it is
This code identifies rheumatic heart disease affecting both the mitral and tricuspid valves. Use it when documentation states rheumatic involvement of both valves, with or without stenosis or regurgitation.
Clinical signs
Clinical features vary; refer to documentation. Findings may include a heart murmur, signs of valvular dysfunction, atrial enlargement, or symptoms of heart failure when disease is advanced.
When to use this code
Use I08.1 when the provider documents rheumatic disease involving both the mitral and tricuspid valves. It is appropriate for confirmed rheumatic valvular disease, even if the note does not specify the exact severity. If the record mentions only one valve, check documentation before assigning this code.
Do not use for
Do not use this code for nonrheumatic valve disease or for isolated mitral or tricuspid disorders. If the documentation does not clearly link both valves to a rheumatic cause, check documentation.
Coding tip
Code the rheumatic valve combination only when both valves are explicitly documented together; otherwise, report the more specific documented valve condition.