Q99.2

Fragile X chromosome

Billable / specificPOA exempt

Q99.2 is a billable, specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes in FY2027.

Inclusion terms

Applicable to

  • Fragile X syndrome

Includes (from Q99)

  • Note: Codes from this chapter are not for use on maternal records

Excludes2

Not included here — may be reported together when both conditions exist.

  • inborn errors of metabolism (E70-E88) (from Q99)
  • mitochondrial metabolic disorders (E88.4-) (from Q99)

Also known as

  • Fragile X syndrome
  • Fragile, fragility, X chromosome
  • Syndrome, fragile X

Parent code

  • Q99Other chromosome abnormalities, not elsewhere classifiedHeader

Related codes

  • Q99.0Chimera 46, XX/46, XYBillable
  • Q99.146, XX true hermaphroditeBillable
  • Q99.8Other specified chromosome abnormalitiesHeader
  • Q99.9Chromosomal abnormality, unspecifiedBillable

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