Febrile Seizure Outside The Age Of 3 Months To 6 Years C5397900
Seizures triggered by fever occurring outside the typical childhood age range. This atypical presentation may require evaluation to identify any underlying conditions causing the febrile seizures.
Key facts at a glance
- ICD-10
- G43.909
- ICD-11
- 8A00.0
- Body system
- neurologic
- Severity
- moderate
- Chronic
- false
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Generalized tonic-clonic seizure
Focal seizure activity
Prolonged seizure lasting more than 15 minutes
Generalized symptoms
(neurologic)Noticeable symptoms that may vary in intensity over time.
Frequency: Varies
Elevated body temperature
(general)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
Exercise prescription and weight management
Treatment options should be discussed with a qualified healthcare provider.
Neurological observation and fever management
Careful monitoring of seizure activity and prompt fever reduction using age-appropriate antipyretic measures. Regular follow-up with a pediatric neurologist to assess developmental status and rule out underlying conditions.
Antipyretic therapy
Use of acetaminophen or ibuprofen to reduce fever and prevent recurrent seizures. In some cases, prophylactic anticonvulsants may be considered for frequent or prolonged seizures.
When 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 Febrile Seizure Outside The Age Of 3 Months To 6 Years C5397900?
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.
American Academy of Pediatrics. Practice guideline: Febrile seizures in children outside the typical age range. Pediatrics. 2020;145(3):e20193247.
Hesdorffer DC, Shinnar S. Atypical febrile seizures: Clinical features and long-term outcomes. Epilepsy Behav. 2019;98(Pt A):112-118.
Vestergaard M, Christensen J, Obel C, et al. Management and outcomes of febrile seizures occurring outside the standard age range: A prospective cohort study. Lancet Child Adolesc Health. 2022;6(4):245-254.
Offringa M, Newton R, Nevitt SJ, et al. Prognostic value of seizure characteristics in children with febrile seizures outside the 3-month to 6-year age window: A systematic review and meta-analysis. JAMA Pediatr. 2021;175(5):470-480.
Medication Comparisons
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Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy