ICD-10 Code A39.5 – Meningococcal Heart Disease (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A39.5 – Meningococcal heart disease
What it is
A39.5 identifies heart involvement caused by meningococcal infection. Use it when the record shows meningococcal disease affecting the heart, such as myocarditis or endocarditis linked to this organism.
Clinical signs
Clinical features vary; refer to documentation. Standard references describe cardiac involvement in the setting of meningococcal infection, with signs depending on the specific heart structure affected.
When to use this code
Use this code when the provider documents meningococcal heart disease, or clearly links heart disease to meningococcal infection. It is appropriate when the cardiac condition is part of an active meningococcal illness or a documented complication.
Check the chart for the exact heart diagnosis and any associated sepsis or systemic infection. Code the documented condition as written and follow sequencing rules for the encounter.
Do not use for
Do not use A39.5 for nonspecific meningococcal infection without heart involvement. Do not use it when the heart condition is due to another organism or when documentation does not support a meningococcal cause.
Coding tip
Query the provider if the record mentions meningococcal infection and cardiac findings but does not clearly state heart disease.