G40.89 ICD-10-CM Code: Other seizures
G40.89 is the authoritative medical code for Other seizures. This classification is used in medical billing and clinical recording to specify the clinical criteria for other seizures (ICD-10-CM G40.89), ensuring healthcare documentation aligns with current federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Inpatient Payment Groups (MS-DRG)
MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v43.0 (FY2026), Appendix B.
- MS-DRG 023 — CRANIOTOMY WITH MAJOR DEVICE IMPLANT OR ACUTE COMPLEX CNS PRINCIPAL DIAGNOSIS WITH MCC OR ANTINEOPLASTIC IMPLANT OR EPILEPSY WITH NEUROSTIMULATOR (MDC 01)
- MS-DRG 100 — SEIZURES WITH MCC (MDC 01)
- MS-DRG 101 — SEIZURES WITHOUT MCC (MDC 01)
A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.
Code Set: Valid FY2026 and FY2027. FY2026 took effect October 1, 2025.
Official Registry Overview & Definition
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for G40.89 in the official ICD-10-CM tabular list.
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- post traumatic seizures (R56.1)
- recurrent seizures NOS (G40.909)
- seizure NOS (R56.9)
- conversion disorder with seizures (F44.5)
- convulsions NOS (R56.9)
- 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
What can't be coded together with G40.89?
Per official ICD-10-CM Excludes1 instructions, G40.89 must not be reported together with: post traumatic seizures (R56.1); recurrent seizures NOS (G40.909); seizure NOS (R56.9); conversion disorder with seizures (F44.5).
Can G40.89 be reported alongside related conditions?
Per official ICD-10-CM Excludes2 instructions, G40.89 and the following are not considered part of each other and may both be reported when both conditions are present: hippocampal sclerosis (G93.81); mesial temporal sclerosis (G93.81); temporal sclerosis (G93.81); Todd's paralysis (G83.84).
Nearest Codes in This Family
Official ICD-10-CM classifications closest to G40.89 in its code family, with their registry titles.
- G40.84 — KCNQ2-related epilepsy
- G40.841 — KCNQ2-related epilepsy, not intractable, with status epilepticus
- 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
- G40.9 — Epilepsy, unspecified
- G40.90 — Epilepsy, unspecified, not intractable
- G40.901 — Epilepsy, unspecified, not intractable, with status epilepticus
- G40.909 — Epilepsy, unspecified, not intractable, without status epilepticus
- G40.91 — Epilepsy, unspecified, intractable
Indexed Clinical Terms (1)
Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.
- Seizure (s), specified NEC