Developmental And Epileptic Encephalopathy 99 C5562018
A severe genetic disorder characterized by developmental delay and epilepsy beginning in infancy. Management includes anti-seizure medications and supportive therapies tailored to individual needs.
Key facts at a glance
- ICD-10
- G40.909
- ICD-11
- 8A00.0
- Body system
- neurologic
- Severity
- severe
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Status epilepticus
Generalized symptoms
(neurologic)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Seizures
(neurologic)Hypotonia
(neurologic)Cerebellar ataxia
(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
Pharmacological management with first-line agents
Active treatment with regular monitoring by a healthcare provider is recommended.
Precision ASM Based on Genomic Profile
Antiseizure medication selected according to the specific genetic etiology, typically involving genes affecting ion channels or synaptic function. Genetic panel results guide selection to maximize efficacy and minimize adverse effects.
Ketogenic Diet Therapy
Rigid macronutrient ratio diet inducing nutritional ketosis, shown to reduce seizure burden in genetic epilepsies through metabolic and neuroprotective mechanisms. Classic 3:1 or 4:1 ratios may be modified based on tolerance and seizure response.
Additional treatment options
Responsive Neurostimulation
Closed-loop neurostimulation device detecting seizure activity and delivering targeted electrical intervention to abort seizures. Implanted electrodes provide real-time monitoring and personalized stimulation based on individual seizure patterns.
procedureSleep Hygiene and Circadian Optimization
Structured sleep management program addressing circadian rhythm disruptions common in developmental-epileptic encephalopathies. Consistent sleep-wake schedules, environmental modifications, and melatonin supplementation when appropriate.
complementary24-Hour Video-EEG Monitoring
Extended electroencephalographic recording with synchronized video documentation of clinical events. Enables accurate seizure classification, characterization of epileptiform activity patterns, and assessment of treatment response.
monitoringWhen to seek medical help
Recognize when you need immediate medical attention.
See a doctor within 24 hours
Moderate to severe symptoms that may indicate worsening of this condition. Prompt medical evaluation is recommended.
Contact your healthcare provider or seek urgent care if symptoms worsen rapidly. Go to the emergency department for life-threatening symptoms.
Frequently asked questions
Common questions about this topic.
What is Developmental And Epileptic Encephalopathy 99 C5562018?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalMedication Comparisons
Compare medications used to treat Developmental And Epileptic Encephalopathy 99 C5562018. 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.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 25, 2026. · Read our editorial policy