FY2025
Effective from
- Added
KCNQ2-related epilepsy
Category — select a more specific code
CDC/NCHS · FY2025For US diagnosis claims covered by HIPAA, ICD-10-CM is required from October 1, 2015.
Use the service date for outpatient/professional claims and the discharge date for hospital inpatient claims. Earlier encounters use ICD-9-CM; each individual code must also be valid for the applicable date.
Official coding guidelines → · CMS ↗First observed · 2024-10-01
Latest recorded change · FY2025
Effective from
KCNQ2-related epilepsy
Category — select a more specific code
CDC/NCHS · FY2025| All editions | Effective from | Code history |
|---|---|---|
| FY2025 | 2024-10-01 | Added |
| FY2025 · 04-01 | 2025-04-01 | No tabular change |
| FY2026 | 2025-10-01 | No tabular change |
| FY2026 · April | 2026-04-01 | No tabular change |
| FY2027 | 2026-10-01 | No tabular change |
The official Tabular List has no additional instructions at this code level.
Review the instructions inherited from its parent categories below. Inherited instructions ↓
the following terms are to be considered equivalent to intractable: pharmacoresistant (pharmacologically resistant), treatment resistant, refractory (medically) and poorly controlled
G40.841KCNQ2-related epilepsy, not intractable, with status epilepticusBillable / specificG40.842KCNQ2-related epilepsy, not intractable, without status epilepticusBillable / specificG40.843KCNQ2-related epilepsy, intractable, with status epilepticusBillable / specificG40.844KCNQ2-related epilepsy, intractable, without status epilepticusBillable / specificOther entries in the same category; these are not automatic substitutes.
| Code | Description | Category · further specificity required |
|---|---|---|
| G40.80 | Other epilepsy | Category · further specificity required |
| G40.81 | Lennox-Gastaut syndrome | Category · further specificity required |
| G40.82 | Epileptic spasms | Category · further specificity required |
| G40.83 | Dravet syndrome | Category · further specificity required |
| G40.89 | Other seizures | Billable / specific |
Official titles and instructions are preserved in their source language. Official sources ↗