Q20.8

Other congenital malformations of cardiac chambers and connections

Billable FY2026 2025-10-01 → 2026-09-30

Exclusions 2 never code together

Q20code

Excludes1

dextrocardia with situs inversus (Q89.3)Q89.3
mirror-image atrial arrangement with situs inversus (Q89.3)Q89.3

Excludes1 — never code together. The excluded condition and this one are mutually exclusive.

Instructional notes 1

Q20.8code

Inclusion terms

Cor binoculare

Index entries leading here 5

Anomaly, anomalous (congenital) (unspecified type) Q89.9
- atrial
  - bands or folds Q20.8
- auricle
  - heart Q20.8
- band
  - atrial Q20.8
- cardiac Q24.9
  - chambers Q20.9
    - specified NEC Q20.8
- heart Q24.9
  - auricle Q20.8
  - ventricle Q20.8
Double
- auricle (heart) Q20.8
Cor
- biloculare Q20.8
- triloculare Q20.8
Malformation (congenital) — see also Anomaly
- cardiac
  - chambers Q20.9
    - specified type NEC Q20.8
Unilocular heart Q20.8

Alongside this code 8 same parent — Q20

Q20.0 Common arterial trunk Q20.1 Double outlet right ventricle Q20.2 Double outlet left ventricle Q20.3 Discordant ventriculoarterial connection Q20.4 Double inlet ventricle Q20.5 Discordant atrioventricular connection Q20.6 Isomerism of atrial appendages Q20.9 Congenital malform of cardiac chambers and connections, unsp

Medications 1

692 Congenital, Hereditary, and Neonatal Diseases and Abnormalities drugs

MED-RT files conditions by MeSH, which carves the world differently from ICD-10. These are name matches on this code's description, offered as candidates — not as an assertion that they are this code.

Additional references

AHA Coding Clinic® Licence required

Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.

This code

Billable: yes
Code set: FY2026
Parent: Q20
Block: Q20-Q28
Siblings: 8

Present FY2024–FY2027.

Q20.8

Risk adjustment

This code