ICD-10 Code I97.0 – Postcardiotomy syndrome (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I97.0 – Postcardiotomy syndrome
What it is
Postcardiotomy syndrome is an inflammatory reaction that can occur after heart surgery. It is also called postpericardiotomy syndrome and may involve the pericardium, pleura, or both.
Clinical signs
Typical findings include fever, chest pain, pericardial or pleural effusion, and a pericardial friction rub. Clinical features vary; refer to documentation.
When to use this code
Use I97.0 when the record documents postcardiotomy syndrome as a postoperative complication after cardiac surgery. It fits cases where the clinician links the inflammatory syndrome to the prior procedure. Code the condition only when the documentation supports that relationship.
Do not use for
Do not use this code for routine postoperative pain, isolated pleural effusion, or pericarditis without a documented postcardiotomy syndrome. Check documentation if the note does not clearly connect the condition to cardiac surgery.
Coding tip
Verify that the provider explicitly identifies postcardiotomy syndrome or postpericardiotomy syndrome before assigning I97.0.