Cardiac tamponade

Cardiac tamponade is a life-threatening condition caused by the accumulation of fluid in the pericardial sac, which compresses the heart and impairs its ability to pump blood. This fluid buildup leads to increased intracardiac pressure, reduced ventricular filling, and decreased cardiac output. It can result from various underlying etiologies, including trauma, malignancy, infection, or iatrogenic causes.

This code is used when documentation clearly indicates a diagnosis of cardiac tamponade, regardless of the underlying cause. It is appropriate for both acute and subacute presentations of this condition. Supporting documentation should include clinical findings such as pulsus paradoxus, muffled heart sounds, jugular venous distension, and imaging evidence (e.g., echocardiogram showing pericardial effusion with signs of cardiac compression).

• Always code the underlying cause of the pericardial effusion if known and documented, in addition to this code.
• Distinguish from pericardial effusion without tamponade, which would be coded with I31.3-.
• Ensure documentation specifies "tamponade" or clear signs of cardiac compression to support this specific code.