ICD-10 Q90
Non-Billable HeaderDown syndrome
About ICD-10-CM Q90
ICD-10-CM code Q90 represents Down syndrome. This is a non-billable header code in the Congenital Malformations chapter (block Q90). The 2026 edition of ICD-10-CM Q90 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.
Use Additional Code
When coding Q90, also report these additional codes when applicable.
- code(s) to identify any associated degree of intellectual disabilities (F70-F79)
Coding Notes
Code Also
- associated physical condition(s), such as atrioventricular septal defect (Q21.2-)
Medicare LCD Coverage for Q90
Local Coverage Determinations (LCDs) from CMS MACs that list Q90 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 Q90.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but Q90 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with Q90
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 Q90
Other codes in section Q90-Q99 (Chromosomal abnormalities, not elsewhere classified).
ICD-10 Q90, Billing FAQ
Is ICD-10 code Q90 billable? +
No, Q90 is a non-billable header code. Use a more specific child code from block Q90 when submitting claims.
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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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