I31.31: Malignant pericardial effusion in diseases classified elsewhere
I31.31 is the billable ICD-10-CM diagnosis code for Malignant pericardial effusion in diseases classified elsewhere. It is a fully specified code, so it can be reported on a claim (subject to clinical documentation and your payer's rules).
Frequently asked questions
What is ICD-10-CM code I31.31?
I31.31 is the ICD-10-CM diagnosis code for Malignant pericardial effusion in diseases classified elsewhere. It belongs to category I31 (Other diseases of pericardium).
Is I31.31 a billable code?
Yes. I31.31 is a billable, fully specified ICD-10-CM code, so it can be used on a claim (subject to documentation and payer rules).
What category does I31.31 belong to?
I31.31 is part of ICD-10-CM category I31 — Other diseases of pericardium, which has 16 billable codes.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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