Skip to main content
ICD-10/G40.90

G40.90 ICD-10-CM Code: Epilepsy, unspecified, not intractable

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

Code Set: Valid FY2026 and FY2027. FY2026 took effect October 1, 2025.

Official Registry Overview & Definition

Epilepsy, unspecified, not intractable is a non-billable ICD-10-CM category code (G40.90). A more specific billable subcode must be selected for claims submission.

Official Tabular Instructional Notes

Sequencing, inclusion, and exclusion notes published for G40.90 in the official ICD-10-CM tabular list.

Inclusion Terms

Alternative terms the tabular list files under this code.

  • Epilepsy, unspecified, without intractability

Excludes1 — Not Coded Here

Conditions that can never be reported with this code; the two are mutually exclusive.

  • 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

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

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

Frequently Asked Questions (FAQ) & Clinical Guidance

Can G40.90 be billed directly?

No. G40.90 (Epilepsy, unspecified, not intractable) 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 G40.90 in its code family, with their registry titles.

  • G40.842 — KCNQ2-related epilepsy, not intractable, without status epilepticus
  • G40.843 — KCNQ2-related epilepsy, intractable, with status epilepticus
  • G40.844 — KCNQ2-related epilepsy, intractable, without status epilepticus
  • G40.89 — Other seizures
  • G40.9 — Epilepsy, unspecified
  • G40.901 — Epilepsy, unspecified, not intractable, with status epilepticus
  • G40.909 — Epilepsy, unspecified, not intractable, without status epilepticus
  • G40.91 — Epilepsy, unspecified, intractable
  • G40.911 — Epilepsy, unspecified, intractable, with status epilepticus
  • G40.919 — Epilepsy, unspecified, intractable, without status epilepticus

View all codes in the G40 family