Q98
Header — not billableOther sex chromosome abnormalities, male phenotype, not elsewhere classified
The ICD-10 code for other sex chromosome abnormalities, male phenotype, not elsewhere classified is Q98.
Q98 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 9 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 Q98
- Q98.0Klinefelter syndrome karyotype 47, XXY
- Q98.1Klinefelter syndrome, male with more than two X chromosomes
- Q98.3Other male with 46, XX karyotype
- Q98.4Klinefelter syndrome, unspecified
- Q98.5Karyotype 47, XYY
- Q98.6Male with structurally abnormal sex chromosome
- Q98.7Male with sex chromosome mosaicism
- Q98.8Other specified sex chromosome abnormalities, male phenotype
- Q98.9Sex chromosome abnormality, male phenotype, unspecified
Related codes in this category
- Q90Down syndromenon-billable header
- Q91Trisomy 18 and Trisomy 13non-billable header
- Q92Other trisomies and partial trisomies of the autosomes, not elsewhere classifiednon-billable header
- Q93Monosomies and deletions from the autosomes, not elsewhere classifiednon-billable header
- Q95Balanced rearrangements and structural markers, not elsewhere classifiednon-billable header
- Q96Turner's syndromenon-billable header
- Q97Other sex chromosome abnormalities, female phenotype, not elsewhere classifiednon-billable header
- Q99Other chromosome abnormalities, not elsewhere classifiednon-billable header
- Q98Other sex chromosome abnormalities, male phenotype, not elsewhere classifiednon-billable header