ICD-10 Code I37.1 – Nonrheumatic pulmonary valve insufficiency (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I37.1 – Nonrheumatic pulmonary valve insufficiency
What it is
I37.1 identifies leakage of the pulmonary valve that is not caused by rheumatic disease. It means blood flows backward from the pulmonary artery into the right ventricle because the valve does not close properly.
Clinical signs
Findings may include a pulmonary regurgitation murmur, right ventricular enlargement, or symptoms related to the underlying heart condition. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents nonrheumatic pulmonary valve insufficiency, pulmonary regurgitation, or pulmonary valve incompetence. It is appropriate when the valve disorder is the focus of care or is clearly documented as a current diagnosis. Check documentation if the cause is congenital, post-procedural, or associated with another cardiac condition.
Do not use for
Do not use I37.1 for rheumatic valve disease or for pulmonary valve stenosis. If the record does not clearly state nonrheumatic insufficiency, check documentation before assigning the code.
Coding tip
Confirm that the provider names the pulmonary valve lesion and excludes rheumatic cause before coding I37.1.