Q99.8
Header — not billableOther specified chromosome abnormalities
The ICD-10 code for other specified chromosome abnormalities is Q99.8.
Q99.8 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 2 more specific codes below.
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •This is a non-billable header code. Documentation must support a more specific child code before this diagnosis can be reported on a claim.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Child codes under Q99.8
Related codes in this category
- Q99.0Chimera 46, XX/46, XY
- Q99.146, XX true hermaphrodite
- Q99.2Fragile X chromosome
- Q99.9Chromosomal abnormality, unspecified
- Q99.8Other specified chromosome abnormalitiesnon-billable header
ICD-9-CM equivalent
Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.
- 75881Approximate match
- 75889Approximate match