ICD-10 Code I34.89 – Other nonrheumatic mitral valve disorders (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I34.89 – Other nonrheumatic mitral valve disorders
What it is
This code identifies mitral valve disorders that are not due to rheumatic disease and do not fit a more specific mitral valve diagnosis. Use it when documentation confirms a nonrheumatic mitral valve problem, but the exact type is not otherwise specified.
Clinical signs
Clinical features vary; refer to documentation. Findings may include a heart murmur, echocardiographic mitral valve abnormality, or evidence of mitral valve dysfunction without rheumatic origin.
When to use this code
Use I34.89 when the record states a nonrheumatic mitral valve disorder and no more specific code applies. It is appropriate when the clinician documents an atypical or unspecified mitral valve condition that is clearly not rheumatic. Check documentation if the note only says “mitral valve disease” without further detail.
Do not use for
Do not use this code for rheumatic mitral valve disease or for conditions with a more specific mitral valve code. If the documentation identifies mitral regurgitation, prolapse, stenosis, or another defined disorder, code the documented condition instead.
Coding tip
Look for the words “nonrheumatic” and the exact valve disorder before assigning I34.89.