Dravet syndrome

Caring for someone with this diagnosis? Eleplan keeps diagnoses, medications, documents and every specialist in one plan.

Start free with Eleplan

Dravet syndrome

ORPHA:33069Disease

Also called SMEI · Severe myoclonic epilepsy of infancy · Severe myoclonus epilepsy of infancy

What it is

A rare, genetic, developmental and epileptic encephalopathy characterized by infantile onset of intractable seizures that are often febrile, and associated with cognitive and motor impairment.

Key facts

Prevalence
1-9 / 100 000 (at birth, Europe)
Age of onset
Infancy, Neonatal
Inheritance
Autosomal dominant
Classified as
Disease

Prevalence figures describe populations, not individuals, and are often estimates from a single study. Where the figure is an incidence or a birth prevalence, it says so.

Signs and symptoms

These ranges are how often a sign appears across everyone diagnosed, not a prediction for one person — most people have some of these and not others. Orphanet also records findings that are specifically absent in this disease; those are in the data but not listed here.

Genes

GABRA1Disease-causing germline mutation(s)
GABRG2Disease-causing germline mutation(s)
PCDH19Disease-causing germline mutation(s)
SCN1ADisease-causing germline mutation(s)
SCN1BDisease-causing germline mutation(s) (loss of function)
SCN2ADisease-causing germline mutation(s)
SCN9ACandidate gene tested

ICD-10 codes

G40.4filed under a broader ICD-10 category — shared with 28 other rare diseases

ICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. A shared code identifies the group, not this disease — the ORPHAcode above is what identifies it.

Related health topics

Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.

Benefit programs to look at

Programs whose eligibility touches the same ICD-10 categories. Eligibility is decided by the administering agency, never by this page.

Cross-references

GARD 10430MEDDRA 10073677MONDO 0011794OMIM 607208OMIM 612164OMIM 615744UMLS C0751122

Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.

Powered by Eleplan

A rare diagnosis is just the start. Eleplan keeps the whole care plan in one place.

Diagnoses, medications, documents, appointments, and the whole care team — organized and always in sync, so you are not retelling the same story to every new specialist. With Ellie, your AI care assistant, on top of it. Free to start.