ICD-10 Q07.0
Non-Billable HeaderArnold-Chiari syndrome
About ICD-10-CM Q07.0
ICD-10-CM code Q07.0 represents Arnold-Chiari syndrome. This is a non-billable header code in the Congenital Malformations chapter (block Q07). The 2026 edition of ICD-10-CM Q07.0 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.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under Q07.0. Per CMS ICD-10-CM Tabular 2026.
- Arnold-Chiari syndrome, type II
Type 1 Excludes
Pure excludes, these codes can never be coded together with Q07.0. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- Arnold-Chiari syndrome, type III (Q01.-)
- Arnold-Chiari syndrome, type IV (Q04.8)
Medicare LCD Coverage for Q07.0
Local Coverage Determinations (LCDs) from CMS MACs that list Q07.0 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 Q07.0.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but Q07.0 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with Q07.0
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 Q07.0
Other codes in section Q00-Q07 (Congenital malformations of the nervous system).
ICD-10 Q07.0, Billing FAQ
Is ICD-10 code Q07.0 billable? +
No, Q07.0 is a non-billable header code. Use a more specific child code from block Q07 when submitting claims.
What other names or terms map to Q07.0? +
ICD-10 Q07.0 includes: Arnold-Chiari syndrome, type II.
What codes are Type 1 Excludes for Q07.0? +
Type 1 Excludes (never code together with Q07.0): Arnold-Chiari syndrome, type III (Q01.-); Arnold-Chiari syndrome, type IV (Q04.8)
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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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