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Q20

Non-billable

Congenital malformations of cardiac chambers and connections

Q20 is the ICD-10-CM code for Congenital malformations of cardiac chambers and connections. It is a non-billable category code — use a more specific child code such as Q20.0 for billing.

Status
Header (non-billable)
Chapter
Q00-Q99
Subcodes
9
Edition
FY2026

Q00-Q99 Congenital malformations, deformations and chromosomal abnormalities

Excludes1 — not coded here

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

Frequently asked questions

What is ICD-10 code Q20?
Q20 is the ICD-10-CM code for "Congenital malformations of cardiac chambers and connections". It falls under Q00-Q99 Congenital malformations, deformations and chromosomal abnormalities.
Is Q20 a billable code?
No — Q20 is a non-billable header code. Use a more specific child code (such as Q20.0) for billing.
What are the subcodes of Q20?
Q20 has 9 more specific child codes, including Q20.0, Q20.1, Q20.2.
What is excluded from Q20?
Excludes1 (not coded here): dextrocardia with situs inversus (Q89.3); mirror-image atrial arrangement with situs inversus (Q89.3).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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