ICD-10-CM 2027
ICD-10 code for cardiac malformation
Choose a code from the options below based on the documentation.
From the official ICD-10-CM alphabetic index entry “Malformation (congenital) › cardiac”. Page updated September 29, 2026.
About coding cardiac malformation
The official ICD-10-CM index doesn't give a single default code for cardiac malformation; the code depends on the details below.
More specific cardiac malformation codes (official index)
- chambers Q20.9 — Congenital malformation of cardiac chambers and connections, unspecified
- specified type NEC Q20.8 — Other congenital malformations of cardiac chambers and connections
- septum Q21.9 — Congenital malformation of cardiac septum, unspecified
- specified type NEC Q21.8 — Other congenital malformations of cardiac septa