Atrial septal defect as current complication following AMI

This code signifies a newly developed opening in the atrial septum that occurs as a direct consequence of a recent heart attack. This defect allows blood to shunt between the atria, potentially leading to hemodynamic compromise. It represents a serious and acute complication directly attributable to the myocardial infarction.

Apply this code when documentation clearly states an atrial septal defect (ASD) has developed following an acute myocardial infarction (AMI) and is considered a current complication. The physician's notes should explicitly link the ASD to the recent AMI. This code is appropriate for inpatient and outpatient encounters where this specific complication is being managed.

• Ensure the documentation specifies the ASD as a current complication of the AMI, not a pre-existing or unrelated condition.
• Do not use this code for acquired ASDs that are not explicitly stated as a complication of a recent AMI; refer to the Excludes1 note for guidance.
• Always sequence the acute myocardial infarction code (I21.-) first, followed by this code, as it represents a complication of the AMI.