Q99.0: Chimera 46, XX/46, XY
Q99.0 is the billable ICD-10-CM diagnosis code for Chimera 46, XX/46, XY. 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 Q99.0?
Q99.0 is the ICD-10-CM diagnosis code for Chimera 46, XX/46, XY. It belongs to category Q99 (Other chromosome abnormalities, not elsewhere classified).
Is Q99.0 a billable code?
Yes. Q99.0 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 Q99.0 belong to?
Q99.0 is part of ICD-10-CM category Q99 — Other chromosome abnormalities, not elsewhere classified, which has 20 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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