Q98.2Klinefelter syndrome, male with 46,XX karyotype
Code usage status
Primary diagnosis
May be used as the primary diagnosis
Apply only when it matches the confirmed diagnosis and the documented clinical record.
Specificity
Complete code in the classification
Use when the diagnosis matches and no exclusion applies.
- Group Q90-Q99
- Chromosomal abnormalities, not elsewhere classified
- Official Vietnamese name
- Hội chứng Klinefelter, nam giới có công thức nhiễm sắc thể 46,XX
Related Q98 codes
Q98
Other sex chromosome abnormalities, male phenotype, not elsewhere classified
Q98.0
Primary diagnosis candidate
Klinefelter syndrome karyotype 47,XXY
Q98.1
Primary diagnosis candidate
Klinefelter syndrome, male with more than two X chromosomes
Q98.3
Primary diagnosis candidate
Other male with 46,XX karyotype
Q98.4
Primary diagnosis candidate
Klinefelter syndrome, unspecified
Q98.5
Primary diagnosis candidate
Karyotype 47,XYY
Q98.6
Primary diagnosis candidate
Male with structurally abnormal sex chromosome
Q98.7
Primary diagnosis candidate
Male with sex chromosome mosaicism
Q98.8
Primary diagnosis candidate
Other specified sex chromosome abnormalities, male phenotype
Q98.9
Primary diagnosis candidate
Sex chromosome abnormality, male phenotype, unspecified
Clinical record checklist
View coding guide →- Confirm that the code matches the final documented diagnosis.
- Use one primary-diagnosis code and record only relevant additional conditions.
- Review Ministry indicators, inclusions, exclusions and notes.
- Do not infer a diagnosis beyond the clinical record.
2026 regulatory basis
Indicators are taken from columns 24–29 of the classification accompanying Circular 06/2026/TT-BYT, cross-referenced with Decision 1849/QĐ-BYT and Official Dispatch 4059/BYT-BH.
