| Q98 | Other sex chromosome abnormalities, male phenotype, not elsewhere classified | NON-BILLABLE CODE |
| Q98.0 | Klinefelter syndrome karyotype 47, XXY | BILLABLE CODE |
| Q98.1 | Klinefelter syndrome, male with more than two X chromosomes | BILLABLE CODE |
| Q98.3 | Other male with 46, XX karyotype | BILLABLE CODE |
| Q98.4 | Klinefelter syndrome, unspecified | BILLABLE CODE |
| Q98.5 | Karyotype 47, XYY | BILLABLE CODE |
| Q98.6 | Male with structurally abnormal sex chromosome | BILLABLE CODE |
| Q98.8 | Other specified sex chromosome abnormalities, male phenotype | BILLABLE CODE |
| Q98.9 | Sex chromosome abnormality, male phenotype, unspecified | BILLABLE CODE |
