Coding and coverage · ICD-10-CM

Q98

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

BillableNo payment HCCChapter 17
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Instructional notes

Chapter 17

Excludes2Not included here: the patient may have both; report both when both are present.
  • inborn errors of metabolism (E70-E88)
Notes
  • Codes from this chapter are not for use on maternal records

Section Q90-Q99

Excludes2Not included here: the patient may have both; report both when both are present.
  • mitochondrial metabolic disorders (E88.4-)

Chapter 17: Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1) · Q90-Q99 Chromosomal abnormalities, not elsewhere classified (Q90-Q99)

Source: ICD-10-CM FY 2027 code descriptions and tabular list (CMS and CDC National Center for Health Statistics), effective 2026-10-01 through 2027-09-30 · CMS ICD-10 files. HCC mapping: CMS-HCC V28, payment year 2027. As of 2026-11-04.

Coverage and payment depend on the claim details; confirm with the Medicare Administrative Contractor.