ICD-10 Code I50.813 – Acute on chronic right heart failure (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I50.813 – Acute on chronic right heart failure
What it is
This code identifies right-sided heart failure that has worsened acutely on top of a chronic baseline condition. It means the right ventricle is not pumping effectively enough, and the current episode is an acute decompensation.
Clinical signs
Common findings include peripheral edema, jugular venous distention, hepatomegaly, abdominal fullness, and other signs of systemic venous congestion. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents acute worsening of chronic right heart failure, including terms such as “acute on chronic” or “decompensated” right heart failure. Code only when both the chronic condition and the acute exacerbation are clearly supported in the record.
Do not use for
Do not use this code for isolated chronic right heart failure without an acute episode. Do not assign it when documentation is vague or when the diagnosis is left-sided failure only; check documentation.
Coding tip
Look for explicit provider wording that links the acute episode to chronic right heart failure before coding I50.813.