G40.50 ICD-10-CA code: Special epileptic syndromes, not stated as intractable
G40.50 is the ICD-10-CA code for “Special epileptic syndromes, not stated as intractable” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
G40.50Special epileptic syndromes, not stated as intractable
Short description: Special epileptic syndromes n intr
ICD-10-CA · Canada · Also written G4050
Index terms
Entries in CIHI’s alphabetical index that lead to G40.50. Searching the index by the condition the note names is how coders reach this code.
- Kojevnikov's, Kozhevnikof's epilepsy, not stated as intractable
- Epilepsy, epileptic, epilepsia, Kozhevnikof's, not stated as intractable
- Epilepsy, epileptic, epilepsia, related to, drugs, not stated as intractable
- Epilepsy, epileptic, epilepsia, partialis continua, not stated as intractable
- Epilepsy, epileptic, epilepsia, related to, stress, not stated as intractable
- Discharge (from), diencephalic autonomic idiopathic, not stated as intractable
- Epilepsy, epileptic, epilepsia, related to, alcohol, not stated as intractable
- Epilepsy, epileptic, epilepsia, syndrome, special NEC, not stated as intractable
- Epilepsy, epileptic, epilepsia, related to, hormonal changes, not stated as intractable
- Epilepsy, epileptic, epilepsia, related to, sleep deprivation, not stated as intractable
- Epilepsy, epileptic, epilepsia, related to, external cause NEC, not stated as intractable
Notes for G40.50
As CIHI prints them, with any note G40.50 takes from the headings above it.
Includes
- Epilepsia partialis continua [Kozhevnikof]Epileptic seizures related to:• alcohol• drugs• hormonal changes• sleep deprivation• stressFrom G40.5 Special epileptic syndromes
Use additional code
Add a code for this detail when the note documents it.
- Use additional external cause code (Chapter XX) to identify drug, if drug-induced.From G40.5 Special epileptic syndromes
- Use additional code to identify any associated condition(s) or cause.From G40 Epilepsy
- Use additional code to identify any associated status epilepticus (G41.-)From G40 Epilepsy
Excludes
Conditions classified elsewhere.
- Epileptic seizure related to psychoactive substance withdrawal (F10-F19 with common fourth characters .3 and .4)From G40.5 Special epileptic syndromes
- Conversion disorder with seizures (F44.5)convulsion NOS (R56.88)convulsions of newborn (P90)epileptic psychosis (F06.8)febrile convulsions (R56.0-)isolated (first) seizure (R56.88)Landau-Kleffner syndrome (F80.3)seizure (convulsive) NOS (R56.88)Todd's paralysis (postepileptic) (G83.8)From G40 Epilepsy
- Certain:• conditions originating in the perinatal period (P00-P96)• infectious and parasitic diseases (A00-B99)complications of pregnancy, childbirth and the puerperium (O00-O99)congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)endocrine, nutritional and metabolic diseases (E00-E90)injury, poisoning and certain other consequences of external causes (S00-T98)neoplasms (C00-D48)symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)From Chapter 6: Diseases of the nervous system (G00-G99)
Where G40.50 sits
- 1ChapterChapter 6: Diseases of the nervous system (G00-G99)
- 2Block G40-G47Episodic and paroxysmal disorders
- 3Category G40Epilepsy
- 4Subcategory G40.5Special epileptic syndromes
- 5Valid code G40.50Special epileptic syndromes, not stated as intractable
Source and release
- Data release
- ICD-10-CA · FY 2026–2027
- Effective date
- Apr 1, 2026
- Publisher
- CIHI
This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
What does ICD-10-CA code G40.50 mean?
G40.50 is the ICD-10-CA code for “Special epileptic syndromes, not stated as intractable” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is G40.50 in ICD-10-CA?
G40.50 sits under G40.5 Special epileptic syndromes, within G40 Epilepsy, within G40-G47 Episodic and paroxysmal disorders, within Chapter 6: Diseases of the nervous system (G00-G99).
What coding notes apply to G40.50?
ICD-10-CA lists Includes, Use additional code, Excludes notes for G40.50, including those from the headings it sits under. They are listed on this page with where each one comes from.
Which ICD-10-CA release does this page use?
It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.