AutoICD API

Q99.2

Billable

Fragile X chromosome

Fragile X chromosome

Status

Billable / Specific

Parent Code

Q99

ICD-11 Mapping

1 equivalent

Coding Notes

Inclusion Terms

Alternative clinical terms for this condition

  • Fragile X syndrome

Excludes 2

Conditions not included here, but the patient may have both

Related Codes(4)
Q99.0

Chimera 46, XX/46, XY

BillableQ99.1

46, XX true hermaphrodite

BillableQ99.8

Other specified chromosome abnormalities

BillableQ99.9

Chromosomal abnormality, unspecified

Billable
ICD-11 Equivalents(1)

ICD-11 Equivalents

View full mapping

Corresponding ICD-11 codes from the WHO crosswalk mapping

LD55Fragile X chromosomeequivalentPrimary
Also Known As / Clinical Terms(98)

SNOMED CT

UMLS

Clinical Terms

  • Fragile X syndrome
  • FXS
  • Martin-Bell Syndrome
  • Mental Retardation, X-Linked, Associated With Marxq28
  • POF - Premature ovarian failure
  • Dementia due to genetic disease
  • MARKER X SYNDROME
  • X Linked Mental Retardation and Macroorchidism
  • chromosome x fragile
  • Dementia due to fragile X syndrome
  • X-Linked Mental Retardation and Macroorchidism
  • Fragile X chromosome (disorder)
  • Marker X Syndromes
  • Syndromes, Marker X
  • Premature ovarian failure
  • FRAXA (fragile X) syndrome
  • autism fragile syndrome x
  • disorder fragile x syndrome
  • Dementia due to chromosomal anomaly
  • Fragile X syndrome (disorder)
  • fragile x syndrome autism
  • FRAXF syndrome
  • fragile syndrome x
  • x chromosome fragile
  • Martin Bell Syndrome
  • Intellectual disability associated with fragile site FRAXE
  • Fragile X associated tremor ataxia syndrome
  • FRAGILE X MENTAL RETARDATION SYNDROME
  • x fragile syndrome
  • Syndromes, Fragile X
  • FRAXE intellectual disability syndrome
  • fragile-x syndrome
  • Fragile X Syndromes
  • Fra(X) syndrome
  • Syndrome, Marker X
  • Syndrome, Martin-Bell
  • Syndrome, Fragile X
  • Fragile X associated primary ovarian insufficiency
Frequently Asked Questions
What is the ICD-10 code for fragile x chromosome?

The ICD-10-CM code for fragile x chromosome is Q99.2. The full clinical description is "Fragile X chromosome". Q99.2 is a billable/specific code that can be used on insurance claims and medical billing.

What does ICD-10 code Q99.2 mean?

ICD-10-CM code Q99.2 represents “Fragile X chromosome”. It is classified under Chapter 17: Congenital Malformations, Deformations and Chromosomal Abnormalities and is a billable/specific code that can be used on a claim.

Is Q99.2 a billable code?

Yes, Q99.2 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.

What chapter is Q99.2 in?

Q99.2 is in Chapter 17: Congenital Malformations, Deformations and Chromosomal Abnormalities (codes Q00-Q99).

What SNOMED CT codes does Q99.2 map to?

Q99.2 maps to 10 SNOMED CT concepts: 722980006, 1259473000, 1259476008, 613003, 716709002, and 5 more. SNOMED CT is a clinical terminology used in electronic health records.

What are the UMLS CUIs for Q99.2?

Q99.2 is linked to 2 UMLS Concept Unique Identifiers: C0016667, C0432482. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.

How does Q99.2 relate to ICF functioning codes?

ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like fragile x chromosome affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.

What is the ICD-11 equivalent of Q99.2?

Q99.2 maps to the ICD-11 code: LD55 (Fragile X chromosome).

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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.