Q98
Q98 — Other sex chromosome abnormalities, male phenotype, not elsewhere classified
Non-billable headerICD-10-CM
Q98 is a non-billable header ICD-10-CM code for other sex chromosome abnormalities, male phenotype, not elsewhere classified. It cannot be billed on its own: choose one of the more specific child codes below.
Other codes that can never be billed with Q98
These codes carry an Excludes1 note pointing at Q98. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading Q98 alone.
- E29Testicular dysfunction
Risk adjustment
Q98 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Code to one of these instead Q98
9 child codes. Green means billable.
- 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
Questions about Q98
- Is Q98 a billable ICD-10-CM code?
- No. Q98 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does Q98 sit in the tabular list?
- Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Chromosomal abnormalities, not elsewhere classified (Q90-Q99).