Q98 ICD-10-CM Code: Other sex chromosome abnormalities, male phenotype, not elsewhere classified
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Code definition
Official description
Q98Other sex chromosome abnormalities, male phenotype, not elsewhere classified
ICD-10-CM diagnosis code · United States clinical modification
Classification
Where Q98 sits
- 1
Chapter 17
Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1)
- 2
Section
Chromosomal abnormalities, not elsewhere classified (Q90-Q99)
- 3
Category Q98
Other sex chromosome abnormalities, male phenotype, not elsewhere classified
- 4
Code Q98
Other sex chromosome abnormalities, male phenotype, not elsewhere classified
More specific choices
Codes under Q98
Q98 is a non-billable category. Choose the child code that best matches the documented diagnosis.
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
Documentation details
Notes for this code
Inclusion terms
No inclusion terms are listed for Q98.
Code first
No “code first” instruction is listed for Q98.
Use additional code
No “use additional code” instruction is listed for Q98.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for Q98.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for Q98.
Transparency
Source and release
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Review the CDC/NCHS ICD-10-CM sourceCode-specific guidance
Frequently asked questions
What does ICD-10-CM code Q98 mean?
Q98 is the FY 2027 U.S. ICD-10-CM code for “Other sex chromosome abnormalities, male phenotype, not elsewhere classified.”
Is Q98 a billable or specific ICD-10-CM code?
No. Q98 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is Q98 located in ICD-10-CM?
Q98 is listed in Chapter 17, Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1), within Chromosomal abnormalities, not elsewhere classified (Q90-Q99) (Q90–Q99), under category Q98, Other sex chromosome abnormalities, male phenotype, not elsewhere classified.
What coding notes are listed for Q98?
No inclusion terms are listed for Q98 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.
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