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2. ICD-10 Codes
3. Chapter - Q00-Q99
4. Section - Q90-Q99
5. Category - Q98
6. Q98.1

Q98.1 - Klinefelter syndrome, male with more than two X chromosomes

• Applicable to Klinefelter syndrome, male with more than two X chromosomes
• The 2025 edition of ICD10-CM Q98.1 became effective on October 1, 2024.
• This is the American ICD10-CM version of Q98.1 - other international versions of ICD10 Q98.1 may differ.
• Q98.1 is a Billable / Specific ICD10-CM code that can be used to indicate a diagnosis for reimbursement purposes.

The following codes above Q98.1 contain annotation back-references that may be applicable to Q98.1:

• Chapter: Q00-Q99 - Congenital malformations, deformations and chromosomal abnormalities
• Section: Q90-Q99 - Chromosomal abnormalities, not elsewhere classified
• Category: Q98 - Other sex chromosome abnormalities, male phenotype, not elsewhere classified

Browse other similar CM codes:

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.