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ICD-10-CM 2027

ICD-10 code for septum absence

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

From the official ICD-10-CM alphabetic index entry “Absence (of) (organ or part) (complete or partial) › septum”. Page updated September 29, 2026.

About coding septum absence

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

More specific septum absence codes (official index)

  • atrial (congenital) Q21.19 — Other specified atrial septal defect
  • between aorta and pulmonary artery Q21.4 — Aortopulmonary septal defect
  • ventricular (congenital) Q20.4 — Double inlet ventricle

Common questions about septum absence ICD-10 codes

What is the ICD-10 code for atrial septum absence?

Q21.19 — Other specified atrial septal defect.

What is the ICD-10 code for ventricular septum absence?

Q20.4 — Double inlet ventricle.