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G40.2

⚠ Non-billable (Header)

Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures

Diseases of the nervous system (G00-G99)

⚠️ This is a category header code — not billable. Use a more specific child code below.

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Also Known As

Attacks with alteration of consciousness, often with automatismsComplex partial seizures developing into secondarily generalized seizures

❌ Excludes1

inherited

Rules inherited from parent codes in the hierarchy.

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

⚠️ Excludes2

inherited

Rules inherited from parent codes.

G40
  • • hippocampal sclerosis (G93.81)
  • • mesial temporal sclerosis (G93.81)
  • • temporal sclerosis (G93.81)
  • • Todd's paralysis (G83.84)

Child Codes (2)

G40.20Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, not intractableG40.21Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, intractable

Clinical Description

ICD-10-CM code G40.2 represents localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures. This code falls under the Diseases of the nervous system (G00-G99) classification. It is a non-billable category header code. A more specific child code from the list below must be used for billing and reimbursement purposes.

This is a 5-character code at the 4th level of specificity. There are 2 more specific child codes under G40.2. Coders should note that G40.2 has 5 Excludes1 restriction(s) — codes that cannot be reported together on the same claim.

Frequently Asked Questions

What is ICD-10 code G40.2?

ICD-10-CM code G40.2 is "Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures". It belongs to the category: Diseases of the nervous system (G00-G99).

Is G40.2 a billable ICD-10 code?

No, G40.2 is a non-billable header code. A more specific child code must be used for billing.

What codes are excluded with G40.2?

G40.2 has 5 Excludes1 rule(s). These codes are mutually exclusive and cannot be coded together on the same claim.

Can G40.2 be coded with other codes?

G40.2 has 4 Excludes2 note(s). These conditions can be coded together if both are documented in the patient record.

Related Codes in G40

Other codes in the same category that may be relevant for differential coding:

G40.0Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onsetG40.1Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizuresG40.3Generalized idiopathic epilepsy and epileptic syndromesG40.4Other generalized epilepsy and epileptic syndromesG40.5Epileptic seizures related to external causesG40.8Other epilepsy and recurrent seizuresG40.9Epilepsy, unspecifiedG40.AAbsence epileptic syndromeG40.BJuvenile myoclonic epilepsy [impulsive petit mal]G40.CLafora progressive myoclonus epilepsy

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Code Information

CodeG40.2
BillableNo — Header code
ParentG40
CategoryDiseases of the nervous system (G00-G99)
Excludes15 rule(s)
Excludes24 note(s)
Child codes2

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)