ICD-10 Q31
Non-Billable HeaderCongenital malformations of larynx
About ICD-10-CM Q31
ICD-10-CM code Q31 represents Congenital malformations of larynx. This is a non-billable header code in the Congenital Malformations chapter (block Q31). The 2026 edition of ICD-10-CM Q31 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 Q31. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- congenital laryngeal stridor NOS (P28.89)
Medicare LCD Coverage for Q31
Local Coverage Determinations (LCDs) from CMS MACs that list Q31 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 Q31.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but Q31 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with Q31
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 Q31
Other codes in section Q30-Q34 (Congenital malformations of the respiratory system).
ICD-10 Q31, Billing FAQ
Is ICD-10 code Q31 billable? +
No, Q31 is a non-billable header code. Use a more specific child code from block Q31 when submitting claims.
What codes are Type 1 Excludes for Q31? +
Type 1 Excludes (never code together with Q31): congenital laryngeal stridor NOS (P28.89)
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on June 1, 2026.
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