Chronic adhesive pericarditis

This code represents a long-standing inflammation of the pericardium (the sac surrounding the heart) where the layers have become abnormally stuck together, often with fibrous tissue. This adhesion can restrict the heart's normal movement and function, leading to impaired cardiac filling and output.

Apply this code when documentation clearly indicates a chronic, adhesive form of pericarditis, often identified through imaging studies (e.g., echocardiogram, MRI) showing pericardial thickening and adherence. This diagnosis is typically made after acute pericarditis has resolved but left residual structural changes.

• Differentiate from acute pericarditis (I01.0, I30.x) or other non-adhesive chronic forms.
• Ensure documentation specifies "adhesive" or "constrictive" features if applicable, as this code specifically denotes adhesion.
• Look for associated symptoms like dyspnea, fatigue, or signs of heart failure that may be secondary to the chronic adhesive process.