Q87.88: CTNNB1 syndrome
Q87.88 is the billable ICD-10-CM diagnosis code for CTNNB1 syndrome. It is a fully specified code, so it can be reported on a claim (subject to clinical documentation and your payer's rules).
Frequently asked questions
What is ICD-10-CM code Q87.88?
Q87.88 is the ICD-10-CM diagnosis code for CTNNB1 syndrome. It belongs to category Q87 (Other specified congenital malformation syndromes affecting multiple systems).
Is Q87.88 a billable code?
Yes. Q87.88 is a billable, fully specified ICD-10-CM code, so it can be used on a claim (subject to documentation and payer rules).
What category does Q87.88 belong to?
Q87.88 is part of ICD-10-CM category Q87 — Other specified congenital malformation syndromes affecting multiple systems, which has 41 billable codes.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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