Q98.8Billable
Other specified sex chromosome abnormalities, male phenotype
- Chapter
- 17. Congenital malformations, deformations and chromosomal abnormalities
- Category
- Q98
- Effective date
- October 1, 2026
Related codes in category Q98
Q98Oth sex chromosome abnormalities, male phenotype, NECQ98.0Klinefelter syndrome karyotype 47, XXYYesQ98.1Klinefelter syndrome, male with more than two X chromosomesYesQ98.3Other male with 46, XX karyotypeYesQ98.4Klinefelter syndrome, unspecifiedYesQ98.5Karyotype 47, XYYYesQ98.6Male with structurally abnormal sex chromosomeYesQ98.7Male with sex chromosome mosaicismYesQ98.9Sex chromosome abnormality, male phenotype, unspecifiedYes
Frequently asked questions
What is ICD-10 code Q98.8?
Q98.8 is an ICD-10-CM diagnosis code for Other specified sex chromosome abnormalities, male phenotype.
Is Q98.8 a billable code?
Yes. Q98.8 is billable and specific enough to be used on a claim.
What ICD-10-CM chapter is Q98.8 in?
Q98.8 falls under Chapter 17: Congenital malformations, deformations and chromosomal abnormalities.
When did Q98.8 become effective?
Q98.8 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to Q98.8?
Q98.8 belongs to category Q98, which includes 9 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.