Q98.9
ICD-10BillableSex chromosome abnormality, male phenotype, unspecified
Official ICD-10-CM descriptor (FY2026)
Sex chromosome abnormality, male phenotype, unspecified
Q98.9 is valid for submission on a claim — CMS flags it as a billable, specific code.
Related codes in 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
Where this code sits
- Parent code
- Q98
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.