ICD-10 Code I08.3 – Combined rheumatic disorders of mitral, aortic and tricuspid valves (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I08.3 – Combined rheumatic disorders of mitral, aortic and tricuspid valves
What it is
This code identifies rheumatic heart disease affecting the mitral, aortic, and tricuspid valves together. Use it when documentation shows combined rheumatic valve involvement rather than a single-valve disorder.
Clinical signs
Findings may include murmurs or evidence of valvular stenosis or regurgitation involving more than one valve. Clinical features vary; refer to documentation and supporting cardiac imaging or examination notes.
When to use this code
Use I08.3 when the record clearly states combined rheumatic disease of the mitral, aortic, and tricuspid valves. It is appropriate when the clinician documents all three valves as affected by rheumatic disease, or when a combined rheumatic multivalve diagnosis is recorded.
Do not use for
Do not use this code for nonrheumatic valve disease or for isolated involvement of only one or two valves. If the documentation is unclear about rheumatic origin or valve combination, check documentation.
Coding tip
Code the exact valve combination documented, and confirm rheumatic etiology before assigning I08.3.