G40.501
BillableEpileptic seizures related to external causes, not intractable, with status epilepticus
HCC Category Mapping
V28HCC 201 — Seizure Disorders and Convulsions
0.262V24HCC 79 — Seizure Disorders and Convulsions
0.244ESRDHCC 79 — Seizure Disorders and Convulsions
0.000RxHCCHCC 164 — Seizure Disorders, Non-Intractable Epilepsy
0.000What This Code Means
Seizures triggered by external causes (like stress or lack of sleep) that can be controlled with medication, currently experiencing a prolonged seizure state.
Coding Tips
- •Status epilepticus indicates a medical emergency requiring immediate intervention; ensure this is documented in the clinical record
- •External causes must be identified and documented to support this code selection over other epilepsy codes
Clinical Significance
Epileptic seizures related to external causes with status epilepticus identifies patients whose seizures are triggered by identifiable external factors such as sleep deprivation, alcohol withdrawal, drug toxicity, or metabolic disturbances, and who are currently experiencing a prolonged seizure emergency. Identifying the external trigger is essential for both acute management and prevention of future episodes.
Documentation Requirements
- ✓Identification of the specific external cause triggering seizures (e.g., alcohol withdrawal, drug toxicity, sleep deprivation, metabolic derangement)
- ✓Documentation of active status epilepticus during the encounter
- ✓Statement that seizures respond to treatment (not intractable)
- ✓Emergency interventions provided
- ✓External cause code to pair with this diagnosis
- ✓Assessment of whether seizures are provoked only or if underlying epilepsy exists
Commonly Confused Codes
G40.509 — Same external-cause seizures but WITHOUT status epilepticusG40.401 — Other generalized epilepsy with status epilepticus; use when seizures are NOT linked to specific external causeG40.901 — Unspecified epilepsy with status epilepticus; less specificR56.9 — Unspecified convulsions; for single provoked seizure events without epilepsy diagnosisG40.801 — Other epilepsy with status epilepticus; when external cause is not the primary etiology
Code Hierarchy
└G40Epilepsy and recurrent seizures└G40.5Epileptic seizures related to external causes└G40.50Epileptic seizures related to external causes, not intractable└G40.501Epileptic seizures related to external causes, not intractable, with status epilepticus
└G40.501Epileptic seizures related to external causes, not intractable, with status epilepticus