Q98.4 — Klinefelter syndrome, unspecified
Q98.4 is a billable, specific ICD-10-CM code for klinefelter syndrome, unspecified. It is valid for submission on a claim.
Other codes that can never be billed with Q98.4
These codes carry an Excludes1 note pointing at Q98.4. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading Q98.4 alone.
- E29Testicular dysfunction
Risk adjustment
Q98.4 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.
How Q98.4 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to Q98.4.
- Klinefelter's syndrome
- Anomaly, anomalous›chromosomes, chromosomal›sex›Klinefelter's
Related codes at this level
Codes that share Q98. If Q98.4 is not quite right, the correct code is usually one of these.
- Q98.0Klinefelter syndrome karyotype 47, XXY
- Q98.1Klinefelter syndrome, male with more than two X chromosomes
- Q98.3Other male with 46, XX karyotype
- 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 Q98.4
- Is Q98.4 a billable ICD-10-CM code?
- Yes. Q98.4 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does Q98.4 sit in the tabular list?
- Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Chromosomal abnormalities, not elsewhere classified (Q90-Q99).