ICD-10 Code I23.2 – Ventricular septal defect as current complication following acute myocardial infarction (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I23.2 – Ventricular septal defect as current complication following acute myocardial infarction
What it is
I23.2 identifies a ventricular septal defect that develops as a current complication after an acute myocardial infarction. It means the heart attack has caused an abnormal opening between the ventricles.
Clinical signs
Typical findings include a new harsh holosystolic murmur, signs of left-to-right shunting, and acute heart failure or cardiogenic shock. Clinical features vary; refer to documentation.
When to use this code
Use I23.2 when the provider documents a ventricular septal defect as a complication of the current acute MI. The record should clearly link the septal defect to the recent infarction. If the defect is congenital, traumatic, or unrelated to MI, this code is not appropriate.
Do not use for
Do not use this code for congenital ventricular septal defect or a septal defect from another cause. Check documentation if the note only mentions a murmur or suspected shunt without confirming post-MI ventricular septal rupture.
Coding tip
Confirm that the defect is documented as a current post-infarction complication, not a historical finding or separate cardiac diagnosis.