Q98.4
Klinefelter syndrome, unspecified
Billable FY2026 2025-10-01 → 2026-09-30
This is the unspecified option. 8 more
specific codes sit alongside it. Worth
checking whether the documentation supports one of them.
Exclusions 1 never code together
Instructional notes
No further instructional notes apply.
Index entries leading here 2
Alongside this code 8 same parent — Q98
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 Q98.5 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
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.