ICD-10 Q20
Non-Billable HeaderCongenital malformations of cardiac chambers and connections
About ICD-10-CM Q20
ICD-10-CM code Q20 represents Congenital malformations of cardiac chambers and connections. This is a non-billable header code in the Congenital Malformations chapter (block Q20). The 2026 edition of ICD-10-CM Q20 became effective on October 1, 2025. Non-billable codes cannot be used as a primary or secondary diagnosis on a claim, use a more specific child code instead.
Type 1 Excludes
Pure excludes, these codes can never be coded together with Q20. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- dextrocardia with situs inversus (Q89.3)
- mirror-image atrial arrangement with situs inversus (Q89.3)
Medicare LCD Coverage for Q20
Local Coverage Determinations (LCDs) from CMS MACs that list Q20 as a covered diagnosis.
This doesn't mean the code isn't covered, it means no MAC has issued a Local Coverage Determination naming this specific code. Coverage may still apply under National Coverage Determinations or general medical-necessity rules.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing Q20.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but Q20 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with Q20
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Codes Adjacent To Q20
Other codes in section Q20-Q28 (Congenital malformations of the circulatory system).
ICD-10 Q20, Billing FAQ
Is ICD-10 code Q20 billable? +
No, Q20 is a non-billable header code. Use a more specific child code from block Q20 when submitting claims.
What codes are Type 1 Excludes for Q20? +
Type 1 Excludes (never code together with Q20): dextrocardia with situs inversus (Q89.3); mirror-image atrial arrangement with situs inversus (Q89.3)
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on June 2, 2026.
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