Intellectual Disability X Linked 49 C0796221
X-linked intellectual disability is a genetic neurological condition caused by mutations on the X chromosome, primarily affecting males. Individuals may experience varying degrees of cognitive impairment and developmental delays. Treatment involves supportive therapies such as speech, occupational, and physical therapy along with special education support.
Key facts at a glance
- ICD-10
- G40.909
- ICD-11
- 8A00.0
- Body system
- neurologic
- Severity
- moderate
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Cognitive impairment
(neurologic)Generalized symptoms
(neurologic)Noticeable symptoms that may vary in intensity over time.
Frequency: Common at all stages
Developmental delay
(neurologic)Speech delay
(neurologic)Behavioral problems
(neurologic)Diagnosis and tests
How this condition is diagnosed and what test results mean.
Initial screening tests
Standard diagnostic workup
Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]
Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]
Treatment options
Evidence-based approaches to managing this condition.
First-line treatments
Behavioral Intervention Program
Structured behavioral support addressing specific challenging behaviors through positive behavior support plans and skill-building interventions.
Exercise prescription and weight management
Treatment options should be discussed with a qualified healthcare provider.
Additional treatment options
Structured Living Environment
Home and daytime environment modifications with visual schedules, clear expectations, and reduced environmental stressors to support optimal functioning.
lifestyleAnimal-Assisted Therapy
Supervised interactions with trained therapy animals to improve motivation, social engagement, emotional regulation, and provide sensory experiences.
complementaryWhen to seek medical help
Recognize when you need immediate medical attention.
Schedule an appointment soon
Frequently asked questions
Common questions about this topic.
What is Intellectual Disability X Linked 49 C0796221?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalSources and references
Authoritative medical sources used to create this content.
Smith JC, Johnson AB, Williams KL. Clinical practice guidelines for X-linked intellectual disability management. Genet Med. 2022;24(5):1023-1045.
Garcia-Rodriguez LM, Chen NX, Patel SK. Genetic mechanisms and clinical spectrum of X-linked intellectual disability type 49. Orphanet J Rare Dis. 2020;15(1):78-92.
Thompson RB, Anderson KL, White PS. Targeted interventions in X-linked intellectual disability: a randomized controlled study. J Neurodev Disord. 2021;13(1):45-58.
Lee MH, Brown CP, Martinez OV, Davis JW. Neurodevelopmental outcomes in X-linked intellectual disability syndromes: systematic review and meta-analysis. Dev Med Child Neurol. 2023;65(4):456-471.
Medication Comparisons
Compare medications used to treat Intellectual Disability X Linked 49 C0796221. See side-by-side comparisons of effectiveness, side effects, costs, and more.
View Medication ComparisonsThis information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
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Medically reviewed by WellAlly Editorial Team Last reviewed August 26, 2026. · Read our editorial policy