Rupture of papillary muscle

This code signifies the tearing or complete separation of one or more papillary muscles within the heart. Papillary muscles are crucial for proper mitral and tricuspid valve function, and their rupture leads to severe valvular regurgitation, typically acute mitral regurgitation. This condition is a life-threatening complication, often following myocardial infarction.

Assign this code when documentation explicitly states a rupture of a papillary muscle, most commonly identified via echocardiography. This diagnosis is frequently associated with acute myocardial infarction (AMI) as a mechanical complication. Supporting documentation should detail the acute onset of severe valvular insufficiency and the identification of the ruptured papillary muscle.

• Always code the underlying cause, such as acute myocardial infarction, first, followed by this code as a complication.
• Distinguish from papillary muscle dysfunction or chordae tendineae rupture, which are distinct conditions.
• Ensure documentation specifies "rupture" rather than just "ischemia" or "infarction" of the papillary muscle.