ICD-10 Code G40.821 – Epileptic spasms, not intractable, with status epilepticus (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G40.821 – Epileptic spasms, not intractable, with status epilepticus
What it is
This code identifies epileptic spasms that are not described as intractable and are occurring with status epilepticus. Use it when the record shows ongoing seizure activity or repeated spasms without full recovery between episodes.
Clinical signs
Typical findings include brief, sudden flexion or extension spasms, often in clusters. Clinical features vary; refer to documentation for evidence of persistent seizure activity meeting status epilepticus criteria.
When to use this code
Use this code when the provider documents epileptic spasms and also documents status epilepticus, while the seizures are not stated to be intractable. It fits inpatient, emergency, or neurology notes that clearly link both conditions. Check documentation if the record only says “seizures” or “spasms” without the status epilepticus diagnosis.
Do not use for
Do not use it when epileptic spasms are documented without status epilepticus, or when the condition is described as intractable instead. Check documentation if the note names a different seizure type.
Coding tip
Code both the seizure type and the status only when the provider explicitly documents that combination.