G40.80 — Other epilepsy

Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.

Official Registry Overview & Definition

Other epilepsy is a non-billable ICD-10-CM category code (G40.80). A more specific billable subcode must be selected for claims submission.

Official Tabular Instructional Notes

Sequencing, inclusion, and exclusion notes published for G40.80 in the official ICD-10-CM tabular list.

Excludes1 — Not Coded Here

Conditions generally not reported together with this code (Excludes1) -- an error unless the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

conversion disorder with seizures (F44.5) Compare G40.80 vs F44.5 →
convulsions NOS (R56.9) Compare G40.80 vs R56.9 →
post traumatic seizures (R56.1) Compare G40.80 vs R56.1 →
seizure (convulsive) NOS (R56.9) Compare G40.80 vs R56.9 →
seizure of newborn (P90) Compare G40.80 vs P90 →

Excludes2 — Not Included Here

Conditions not covered by this code, but which may be reported alongside it when both are present.

hippocampal sclerosis (G93.81) Compare G40.80 vs G93.81 →
mesial temporal sclerosis (G93.81) Compare G40.80 vs G93.81 →
temporal sclerosis (G93.81) Compare G40.80 vs G93.81 →
Todd's paralysis (G83.84) Compare G40.80 vs G83.84 →

Frequently Compared Codes

The official Excludes notes on G40.80 name these codes. Each comparison page covers when the two can — or must not — be reported together.

Change history

No changes recorded for this code — unchanged since the FY2016 baseline of the change ledger.

Verify Before Coding

Not billable as written — a more specific code is required: G40.801, G40.802, G40.803, G40.804.

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim.

Referenced by Other Codes

Official ICD-10-CM tabular notes on other codes that name G40.80 or its code family.

3 Excludes1 notes across 2 chapters: G25.3 (via G40.-), R56 (via G40.-), R56.1 (via G40.-).

4 Excludes2 notes: F44.0 (via G40.-), F44.1 (via G40.-), F80.1, F80.2.

1 Code First instructions: F02 (via G40.-).

2 Use Additional Code instructions: Q87.87 (via G40.-), Q93.52 (via G40.-).

9 Code Also instructions across 7 chapters: E20.810 (via G40.-), F78.A1 (via G40.-), G04.8 (via G40.-), G43.1 (via G40.-), G93.45 (via G40.-), I67.850 (via G40.-), Q87.85 (via G40.-), QA0 (via G40.-), Z15.1 (via G40.-).

Contextual Map

Every relationship of G40.80 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Hierarchy

G00-G99 — Chapter 6: Diseases of the Nervous System (G00-G99) (G00-G99) [Hierarchy]

Referenced by Excludes1 notes

G25.3 — Myoclonus [Excludes1](via G40.-): “myoclonic epilepsy (G40.-)” · check together
R56 — Convulsions, not elsewhere classified [Excludes1](via G40.-): “epileptic convulsions and seizures (G40.-)” · check together
R56.1 — Post traumatic seizures [Excludes1](via G40.-): “post traumatic epilepsy (G40.-)” · check together

Referenced by Excludes2 notes

F44.0 — Dissociative amnesia [Excludes2](via G40.-): “postictal amnesia in epilepsy (G40.-)” · check together
F44.1 — Dissociative fugue [Excludes2](via G40.-): “postictal fugue in epilepsy (G40.-)” · check together
F80.1 — Expressive language disorder [Excludes2]: “acquired aphasia with epilepsy [Landau-Kleffner] (G40.80-)” · check together
F80.2 — Mixed receptive-expressive language disorder [Excludes2]: “acquired aphasia with epilepsy [Landau-Kleffner] (G40.80-)” · check together

Referenced by Code First instructions

F02 — Dementia in other diseases classified elsewhere [Code First](via G40.-): “epilepsy and recurrent seizures (G40.-)” · check together

Referenced by Use Additional Code instructions

Q87.87 — Hao-Fountain Syndrome [Use Additional Code](via G40.-): “epilepsy, by specific type (G40.-)” · check together
Q93.52 — Phelan-McDermid syndrome [Use Additional Code](via G40.-): “epilepsy and recurrent seizures (G40.-)” · check together

Referenced by Code Also instructions (9)

E20.810 — Autosomal dominant hypocalcemia [Code Also](via G40.-): “seizure disorder (G40.-, R56.9)” · check together
F78.A1 — SYNGAP1-related intellectual disability [Code Also](via G40.-): “epilepsy and recurrent seizures (G40.-)” · check together
G04.8 — Other encephalitis, myelitis and encephalomyelitis [Code Also](via G40.-): “any associated seizure (G40.-, R56.9)” · check together
G43.1 — Migraine with aura [Code Also](via G40.-): “any associated seizure (G40.-, R56.9)” · check together
G93.45 — Developmental and epileptic encephalopathy [Code Also](via G40.-): “epilepsy, by specific type (G40.-)” · check together
I67.850 — Cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy [Code Also](via G40.-): “epilepsy (G40.-)” · check together
Q87.85 — MED13L syndrome [Code Also](via G40.-): “epilepsy and recurrent seizures (G40.-)” · check together
QA0 — Neurodevelopmental disorders related to specific genetic pathogenic variants [Code Also](via G40.-): “epilepsy, by specific type (G40.-)” · check together
and 1 more

Nearest codes (40)

G40 — Epilepsy and recurrent seizures [Sibling]
G40.3 — Generalized idiopathic epilepsy and epileptic syndromes [Sibling]
G40.30 — Generalized idiopathic epilepsy and epileptic syndromes, not intractable [Sibling]
G40.301 — Generalized idiopathic epilepsy and epileptic syndromes, not intractable, with status epilepticus [Sibling]
G40.309 — Generalized idiopathic epilepsy and epileptic syndromes, not intractable, without status epilepticus [Sibling]
G40.31 — Generalized idiopathic epilepsy and epileptic syndromes, intractable [Sibling]
G40.311 — Generalized idiopathic epilepsy and epileptic syndromes, intractable, with status epilepticus [Sibling]
G40.319 — Generalized idiopathic epilepsy and epileptic syndromes, intractable, without status epilepticus [Sibling]
and 32 more

Frequently Asked Questions (FAQ) & Clinical Guidance

Can G40.80 be billed directly?

No. G40.80 (Other epilepsy) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.

Nearest Codes in This Family

Official ICD-10-CM classifications closest to G40.80 in its code family, with their registry titles.

G40.5 — Epileptic seizures related to external causes
G40.50 — Epileptic seizures related to external causes, not intractable
G40.501 — Epileptic seizures related to external causes, not intractable, with status epilepticus
G40.509 — Epileptic seizures related to external causes, not intractable, without status epilepticus
G40.8 — Other epilepsy and recurrent seizures
G40.801 — Other epilepsy, not intractable, with status epilepticus
G40.802 — Other epilepsy, not intractable, without status epilepticus
G40.803 — Other epilepsy, intractable, with status epilepticus
G40.804 — Other epilepsy, intractable, without status epilepticus
G40.81 — Lennox-Gastaut syndrome

View all codes in the G40 family

G40.80 ICD-10-CM Code: Other epilepsy