ICD-10 Code I31.0 – Chronic adhesive pericarditis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I31.0 – Chronic adhesive pericarditis
What it is
Chronic adhesive pericarditis is long-term inflammation of the pericardium that leaves scar tissue and adhesions. The stiffened pericardial layers can restrict normal heart movement.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include signs of chronic pericardial constriction, reduced cardiac filling, and symptoms such as edema, fatigue, or dyspnea.
When to use this code
Use I31.0 when the record specifically documents chronic adhesive pericarditis or chronic pericardial scarring with adhesions. It is appropriate when the provider identifies a chronic post-inflammatory pericardial condition rather than an acute episode. Check documentation if the note only says pericarditis.
Do not use for
Do not use this code for acute pericarditis, pericardial effusion, or unspecified pericardial disease. If the chart does not clearly state chronic adhesive pericarditis, check documentation.
Coding tip
Code the condition only when the provider documents chronic adhesions or scarring of the pericardium.