Q20
⚠ Non-billable
Congenital malformations of cardiac chambers and connections
ICD-10-CM · FY2026 · Congenital Malformations, Deformations and Chromosomal Abnormalities
Code
Q20
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Congenital Malformations, Deformations and Chromosomal Abnormalities
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code Q20?
ICD-10-CM code Q20 represents Congenital malformations of cardiac chambers and connections. It is a non-billable header code requiring a more specific subcategory in the Congenital Malformations, Deformations and Chromosomal Abnormalities chapter, effective October 1, 2025 – September 30, 2026.
Is Q20 billable?
No. Q20 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is Q20 in?
Q20 belongs to the Congenital Malformations, Deformations and Chromosomal Abnormalities chapter (Q00–Q99) of ICD-10-CM.
Related codes in the Q20 category
Q20.0
Common arterial trunk
Billable
Q20.1
Double outlet right ventricle
Billable
Q20.2
Double outlet left ventricle
Billable
Q20.3
Discordant ventriculoarterial connection
Billable
Q20.4
Double inlet ventricle
Billable
Q20.5
Discordant atrioventricular connection
Billable
Q20.6
Isomerism of atrial appendages
Billable
Q20.8
Other congenital malformations of cardiac chambers and connections
Billable
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