G40-G47 ICD-10-CA block: Episodic and paroxysmal disorders
G40-G47 isn’t a code on its own. Choose one of the 62 codes beneath it, the one the documentation supports.
Official description
G40-G47Episodic and paroxysmal disorders (G40-G47)
ICD-10-CA · Canada
Codes in G40-G47
G40-G47 isn’t a code on its own. Open the group that matches what the note documents.
Notes for G40-G47
As CIHI prints them, with any note G40-G47 takes from the headings above it.
Excludes
Conditions classified elsewhere.
- 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-G47 sits
- 1ChapterChapter 6: Diseases of the nervous system (G00-G99)
- 2Block G40-G47Episodic and paroxysmal disorders
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
Is G40-G47 a valid ICD-10-CA code?
No. G40-G47 (Episodic and paroxysmal disorders) is a block heading in CIHI’s ICD-10-CA FY 2026–2027 release. It holds 62 codes; record the one the documentation supports.
Where is G40-G47 in ICD-10-CA?
G40-G47 sits under Chapter 6: Diseases of the nervous system (G00-G99).
What coding notes apply to G40-G47?
ICD-10-CA lists Excludes notes for G40-G47, 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.
Codes beside G40-G47
G00-G09Inflammatory diseases of the central nervous systemG10-G14Systemic atrophies primarily affecting the central nervous systemG20-G26Extrapyramidal and movement disordersG30-G32Other degenerative diseases of the nervous systemG35-G37Demyelinating diseases of the central nervous systemG50-G59Nerve, nerve root and plexus disordersG60-G64Polyneuropathies and other disorders of the peripheral nervous systemG70-G73Diseases of myoneural junction and muscleG80-G83Cerebral palsy and other paralytic syndromesG90-G99Other disorders of the nervous system