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ICD-10-CM · FY 2026 APRIL UPDATE

G40

Epilepsy and recurrent seizures

Diagnosis reference

Nonbillable category

This entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.

Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification

Related entries

Up to 30 descendants in this category

CODEDESCRIPTIONTYPE
G40.0Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onsetCategory
G40.00Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, not intractableCategory
G40.001Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, not intractable, with status epilepticusBillable
G40.009Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, not intractable, without status epilepticusBillable
G40.01Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, intractableCategory
G40.011Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, intractable, with status epilepticusBillable
G40.019Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, intractable, without status epilepticusBillable
G40.1Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizuresCategory
G40.10Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, not intractableCategory
G40.101Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, not intractable, with status epilepticusBillable
G40.109Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, not intractable, without status epilepticusBillable
G40.11Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, intractableCategory
G40.111Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, intractable, with status epilepticusBillable
G40.119Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, intractable, without status epilepticusBillable
G40.2Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizuresCategory
G40.20Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, not intractableCategory
G40.201Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, not intractable, with status epilepticusBillable
G40.209Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, not intractable, without status epilepticusBillable
G40.21Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, intractableCategory
G40.211Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, intractable, with status epilepticusBillable
G40.219Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, intractable, without status epilepticusBillable
G40.3Generalized idiopathic epilepsy and epileptic syndromesCategory
G40.30Generalized idiopathic epilepsy and epileptic syndromes, not intractableCategory
G40.301Generalized idiopathic epilepsy and epileptic syndromes, not intractable, with status epilepticusBillable
G40.309Generalized idiopathic epilepsy and epileptic syndromes, not intractable, without status epilepticusBillable
G40.31Generalized idiopathic epilepsy and epileptic syndromes, intractableCategory
G40.311Generalized idiopathic epilepsy and epileptic syndromes, intractable, with status epilepticusBillable
G40.319Generalized idiopathic epilepsy and epileptic syndromes, intractable, without status epilepticusBillable
G40.AAbsence epileptic syndromeCategory
G40.A0Absence epileptic syndrome, not intractableCategory

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This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.

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ICD-10-CM codes describe diagnoses. They do not have an independent Medicare PFS reimbursement amount, and billability alone does not establish coverage.