Is Q98 a billable code?
No. Q98 is a header code that groups 9 more specific codes. Use one of the billable codes listed on this page instead.
ICD-10-CM FY2027 diagnosis code
Q98: Other sex chromosome abnormalities, male phenotype, not elsewhere classified
Header code: not billableValid for dates of service October 1, 2026 to September 30, 2027
Q98 groups related diagnoses under other sex chromosome abnormalities, male phenotype, not elsewhere classified. It cannot be used on a claim by itself. Choose the billable code below that matches the patient's record.
Billable codes under Q98
- 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
Q98 questions
What does Q98 mean?
Q98 is the ICD-10-CM code for Other sex chromosome abnormalities, male phenotype, not elsewhere classified. It is in chapter 17, Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99).
Code titles come from the official ICD-10-CM files published by the CDC National Center for Health Statistics. Always check payer rules and the clinical record before billing.