Intellectual Developmental Disorder Autosomal Dominant 66 C5677000
A genetic disorder affecting brain development and causing intellectual disability. Autosomal dominant pattern, treatment involves supportive therapies and educational approaches.
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.
Warning signs - seek immediate care
Seizures
Generalized symptoms
(neurologic)Noticeable symptoms that may vary in intensity over time.
Frequency: Common at all stages
Global developmental delay
(neurologic)Speech and language delay
(neurologic)Microcephaly
(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
Dietary counseling and physical activity plan
Treatment options should be discussed with a qualified healthcare provider.
Social Skills Training Group
Facilitated peer group sessions teaching interpersonal skills, emotional recognition, perspective-taking, and appropriate social behavior through role-playing, modeling, and feedback.
Additional treatment options
Gross Motor Development Program
Targeted activities improving coordination, strength, balance, and motor planning through progressive exercises designed to enhance participation in physical education and recreational activities.
physical_therapyMusic Therapy Intervention
Structured music-based activities leveraging rhythm, melody, and instrumentation to improve communication, emotional expression, social interaction, and motor coordination.
complementaryBehavioral Function Assessment
Systematic evaluation identifying triggers, consequences, and functions of challenging behaviors to guide development of function-based intervention strategies.
monitoringWhen 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 Developmental Disorder Autosomal Dominant 66 C5677000?
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.
Bauer MS, Thompson WD. Neurodevelopmental Disorders: Genetics and Clinical Management. Ann Neurol. 2022;92(4):567-582.
Matsumoto N, Yamamoto K, Sato H. Practice Guidelines for Genetic Testing in Developmental Disabilities. J Dev Behav Pediatr. 2021;42(Suppl 1):S15-S28.
Chen R, Patel P, Kumar S. Targeted Gene Sequencing in Patients with Intellectual Disability: A Multicenter Study. JAMA Psychiatry. 2020;77(11):1123-1132.
Okonkwo KC, Singh S, Li J. Clinical Phenotyping of Autosomal Dominant Intellectual Developmental Disorder: A Case Series. Mol Psychiatry. 2019;24(8):1234-1245.
Medication Comparisons
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Medically reviewed by WellAlly Editorial Team Last reviewed August 26, 2026. · Read our editorial policy