Developmental And Epileptic Encephalopathy 91 C4540199
A severe developmental and epileptic encephalopathy with childhood-onset seizures and significant neurological impairment.
Key facts at a glance
- ICD-10
- G43.909
- 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
Cortical visual impairment
Generalized symptoms
(neurologic)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Seizures
(neurologic)Developmental delay
(neurologic)Spasticity
(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
Pyridoxine (Vitamin B6) Supplementation
High-dose pyridoxine supplementation represents a critical first-line intervention for pyridoxine-dependent epilepsy, which may be associated with this condition. Some patients require ongoing supplementation throughout life.
Targeted drug therapy with dose adjustment
Active treatment with regular monitoring by a healthcare provider is recommended.
Anti-seizure Medications (ASMs)
Additional anti-seizure medications may be required when pyridoxine alone is insufficient to control seizure activity. Medication selection should consider potential interactions with pyridoxine metabolism.
Additional treatment options
Modified Atkins Diet
Less restrictive alternative to classic ketogenic diet that may provide seizure control benefits while allowing more dietary flexibility. Can be considered as adjunct therapy.
dietaryRegular Seizure and Development Monitoring
Ongoing clinical monitoring including EEG studies, developmental assessments, and seizure diaries to track treatment efficacy and guide therapeutic adjustments.
monitoringOccupational and Speech Therapy
Targeted therapies addressing fine motor skills, oral motor function, and communication development which are frequently impaired in developmental and epileptic encephalopathies.
complementaryWhen 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 91 C4540199?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
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Medically reviewed by WellAlly Editorial Team Last reviewed August 25, 2026. · Read our editorial policy