G40.909
BillableEpilepsy, unspecified, not intractable, without 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
Epilepsy of unknown type that responds to medication, without current status epilepticus.
Coding Tips
- •This is the most common code for unspecified epilepsy in patients whose seizures are controlled
- •Verify that the patient's seizures are indeed controlled by medication before assigning 'not intractable'
Clinical Significance
Epilepsy, unspecified, not intractable, without status epilepticus is the most commonly used unspecified epilepsy code. It captures patients with a diagnosed epilepsy disorder that is medication-controlled but whose specific epilepsy type is not documented. While it maps to the same HCC, striving for greater specificity improves clinical documentation quality and supports care management.
Documentation Requirements
- ✓Diagnosis of epilepsy by a provider
- ✓Confirmation seizures are controlled with medication
- ✓Absence of status epilepticus
- ✓Current antiepileptic medication regimen
- ✓Seizure frequency and last known seizure
- ✓Monitoring plan (EEG, drug levels, follow-up schedule)
Commonly Confused Codes
G40.901 — Unspecified epilepsy WITH status epilepticusG40.919 — Unspecified epilepsy, INTRACTABLE, without status epilepticusG40.409 — Other generalized epilepsy; more specific if generalized type is knownG40.802 — Other epilepsy, not intractable; for epilepsy that is classified but not elsewhere specifiedR56.9 — Unspecified convulsions; no established epilepsy diagnosis
Code Hierarchy
└G40Epilepsy and recurrent seizures└G40.9Epilepsy, unspecified└G40.90Epilepsy, unspecified, not intractable└G40.909Epilepsy, unspecified, not intractable, without status epilepticus
└G40.909Epilepsy, unspecified, not intractable, without status epilepticus