ICD-10-CM category
Q98: Other sex chromosome abnormalities, male phenotype, not elsewhere classified
Codes under Q98 (Other sex chromosome abnormalities, male phenotype, not elsewhere classified). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| Q98.0 | Klinefelter syndrome karyotype 47, XXY | ✓ |
| Q98.1 | Klinefelter syndrome, male with more than two X chromosomes | ✓ |
| Q98.3 | Other male with 46, XX karyotype | ✓ |
| Q98.4 | Klinefelter syndrome, unspecified | ✓ |
| Q98.5 | Karyotype 47, XYY | ✓ |
| Q98.6 | Male with structurally abnormal sex chromosome | ✓ |
| Q98.7 | Male with sex chromosome mosaicism | ✓ |
| Q98.8 | Other specified sex chromosome abnormalities, male phenotype | ✓ |
| Q98.9 | Sex chromosome abnormality, male phenotype, unspecified | ✓ |
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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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