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G40

Non-billable

Epilepsy and recurrent seizures

G40 is the ICD-10-CM code for Epilepsy and recurrent seizures. It is a non-billable category code — use a more specific child code such as G40.0 for billing.

Status
Header (non-billable)
Chapter
G00-G99
Subcodes
11
Edition
FY2026

G00-G99 Diseases of the nervous system

What this means — in plain language

MedlinePlus · NIH

Epilepsy is a brain disorder that causes people to have recurring seizures . The seizures happen when clusters of nerve cells, or neurons, in the brain send out the wrong signals. People may have strange sensations and emotions or behave strangely. They may have violent muscle spasms or lose consciousness. Epilepsy has many possible causes, including illness, brain injury, and abnormal brain development. In many…

Read more about Epilepsy at MedlinePlus ↗

Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.

Excludes1 — not coded here

  • •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 — not included here

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

Notes

  • •the following terms are to be considered equivalent to intractable: pharmacoresistant (pharmacologically resistant), treatment resistant, refractory (medically) and poorly controlled

Medications indicated for this condition

FDA labeling

Drugs whose FDA labeling lists this condition's category among its indications. Informational only — not a treatment recommendation or medical advice.

Conditions mapped to this code

MedlinePlus · NIH
EpilepsySeizures

Plain-language health-topic references grounded in MedlinePlus (NIH/NLM).

Frequently asked questions

What is ICD-10 code G40?
G40 is the ICD-10-CM code for "Epilepsy and recurrent seizures". It falls under G00-G99 Diseases of the nervous system.
Is G40 a billable code?
No — G40 is a non-billable header code. Use a more specific child code (such as G40.0) for billing.
What are the subcodes of G40?
G40 has 11 more specific child codes, including G40.0, G40.1, G40.2.
What is excluded from G40?
Excludes1 (not coded here): conversion disorder with seizures (F44.5); convulsions NOS (R56.9); post traumatic seizures (R56.1); seizure (convulsive) NOS (R56.9).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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