Q98
Other sex chromosome abnormalities, male phenotype, not elsewhere classified
Header / non-billable
Choose the additional character
Q98 needs more characters to be billable. Pick the specific code below.
- Q98.0Klinefelter syndrome karyotype 47, XXYBillable
- Q98.1Klinefelter syndrome, male with more than two X chromosomesBillable
- Q98.3Other male with 46, XX karyotypeBillable
- Q98.4Klinefelter syndrome, unspecifiedBillable
- Q98.5Karyotype 47, XYYBillable
- Q98.6Male with structurally abnormal sex chromosomeBillable
- Q98.7Male with sex chromosome mosaicismBillable
- Q98.8Other specified sex chromosome abnormalities, male phenotypeBillable
- Q98.9Sex chromosome abnormality, male phenotype, unspecifiedBillable
This code does not map to a risk-adjusting HCC in the loaded models.
Coding notes
Excludes 1 never coded together · Excludes 2 may co-exist
Inherited from Q90-Q99Chromosomal abnormalities, not elsewhere classified
Excludes 2
mitochondrial metabolic disorders (E88.4-)
Inherited from chapter 17Congenital malformations, deformations and chromosomal abnormalities
Excludes 2
inborn errors of metabolism (E70-E88)
Note
Codes from this chapter are not for use on maternal records
Official Guidelines for Q98
FY 2026 ›Sections that reference Q98
Sections whose FY 2026 text names Q98, its Q98 category, or a range containing it — the chapter guidance above is the authoritative source.