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ICD-10-CM 2027

ICD-10 code for atrial anomaly

Choose a code from the options below based on the documentation.

From the official ICD-10-CM alphabetic index entry “Anomaly, anomalous (congenital) (unspecified type) › atrial”. Page updated September 29, 2026.

About coding atrial anomaly

The official ICD-10-CM index doesn't give a single default code for atrial anomaly; the code depends on the details below.

More specific atrial anomaly codes (official index)

  • bands or folds Q20.8 — Other congenital malformations of cardiac chambers and connections
  • septa Q21.10 — Atrial septal defect, unspecified

Common questions about atrial anomaly ICD-10 codes

What is the ICD-10 code for bands or folds atrial anomaly?

Q20.8 — Other congenital malformations of cardiac chambers and connections.

What is the ICD-10 code for septa atrial anomaly?

Q21.10 — Atrial septal defect, unspecified.