2024 ICD-10-CM Diagnosis Code Q99.2

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

• Dementia due to chromosomal anomaly
• Dementia due to fragile X syndrome
• Dementia due to genetic disease
• Fragile X associated tremor ataxia syndrome
• Fragile X chromosome
• Fragile X chromosome
• Fragile X chromosome
• Fragile X syndrome
• Fragile X syndrome
• FRAXE intellectual disability syndrome
• FRAXF syndrome
• Symptomatic form of fragile X syndrome in female carrier

Clinical Information

• Fragile X Syndrome

  a condition characterized genotypically by mutation of the distal end of the long arm of the x chromosome (at gene loci fraxa or fraxe) and phenotypically by cognitive impairment, hyperactivity, seizures, language delay, and enlargement of the ears, head, and testes. intellectual disability occurs in nearly all males and roughly 50% of females with the full mutation of fraxa. (from menkes, textbook of child neurology, 5th ed, p226)

• Fragile X Syndrome

  a genetic syndrome caused by mutations in the fmr1 gene which is responsible for the expression of the fragile x mental retardation 1 protein. this protein participates in neural development. this syndrome is manifested with mental, emotional, behavioral, physical, and learning disabilities.

Present on Admission (POA)

Q99.2 is exempt from POA reporting - The Present on Admission (POA) indicator is used for diagnosis codes included in claims involving inpatient admissions to general acute care hospitals. POA indicators must be reported to CMS on each claim to facilitate the grouping of diagnoses codes into the proper Diagnostic Related Groups (DRG). CMS publishes a listing of specific diagnosis codes that are exempt from the POA reporting requirement. Review other POA exempt codes here.

CMS POA Indicator Options and Definitions

POA Indicator	Reason for Code	CMS will pay the CC/MCC DRG?
Y	Diagnosis was present at time of inpatient admission.	YES
N	Diagnosis was not present at time of inpatient admission.	NO
U	Documentation insufficient to determine if the condition was present at the time of inpatient admission.	NO
W	Clinically undetermined - unable to clinically determine whether the condition was present at the time of inpatient admission.	YES
1	Unreported/Not used - Exempt from POA reporting.	NO

Convert Q99.2 to ICD-9-CM

• ICD-9-CM Code: 759.83 - Fragile x syndrome

Patient Education

Fragile X Syndrome

Fragile X syndrome is the most common form of inherited developmental disability. A problem with a specific gene causes the disease. Normally, the gene makes a protein you need for brain development. But the problem causes a person to make little or none of the protein. This causes the symptoms of Fragile X.

People with only a small change in the gene might not show any signs of Fragile X. People with bigger changes can have severe symptoms. These might include:

• Intelligence problems, ranging from learning disabilities to severe intellectual disabilities
• Social and emotional problems, such as aggression in boys or shyness in girls
• Speech and language problems, especially in boys

A genetic blood test can diagnose Fragile X. There is no cure. You can treat some symptoms with educational, behavioral, or physical therapy, and with medicines. Getting treatment early can help.

NIH: National Institute of Child Health and Human Development

[Learn More in MedlinePlus]

Fragile X syndrome

Fragile X syndrome is a genetic condition that causes a range of developmental problems including learning disabilities and cognitive impairment. Usually, males are more severely affected by this disorder than females.

Affected individuals usually have delayed development of speech and language by age 2. Most males with fragile X syndrome have mild to moderate intellectual disability, while about one-third of affected females are intellectually disabled. Children with fragile X syndrome may also have anxiety and hyperactive behavior such as fidgeting or impulsive actions. They may have attention deficit disorder (ADD), which includes an impaired ability to maintain attention and difficulty focusing on specific tasks. About one-third of individuals with fragile X syndrome have features of autism spectrum disorder that affect communication and social interaction. Seizures occur in about 15 percent of males and about 5 percent of females with fragile X syndrome.

Most males and about half of females with fragile X syndrome have characteristic physical features that become more apparent with age. These features include a long and narrow face, large ears, a prominent jaw and forehead, unusually flexible fingers, flat feet, and in males, enlarged testicles (macroorchidism) after puberty.

[Learn More in MedlinePlus]

Code History

• FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
• FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
• FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
• FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
• FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
• FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
• FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
• FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
• FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.