G36.9 ICD-10-CA code: Acute disseminated demyelination, unspecified
G36.9 is the ICD-10-CA code for “Acute disseminated demyelination, unspecified” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
G36.9Acute disseminated demyelination, unspecified
Short description: Acute disseminated demyelination NOS
ICD-10-CA · Canada · Also written G369
Index terms
Entries in CIHI’s alphabetical index that lead to G36.9. Searching the index by the condition the note names is how coders reach this code.
- Neuromyelitis
- Demyelination, demyelinization, disseminated, acute
Notes for G36.9
As CIHI prints them, with any note G36.9 takes from the headings above it.
Excludes
Conditions classified elsewhere.
- Postinfectious encephalitis and encephalomyelitis NOS (G04.8)From G36 Other acute disseminated demyelination
- 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 G36.9 sits
- 1ChapterChapter 6: Diseases of the nervous system (G00-G99)
- 2Block G35-G37Demyelinating diseases of the central nervous system
- 3Category G36Other acute disseminated demyelination
- 4Valid code G36.9Acute disseminated demyelination, unspecified
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 G36.9 mean?
G36.9 is the ICD-10-CA code for “Acute disseminated demyelination, unspecified” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is G36.9 in ICD-10-CA?
G36.9 sits under G36 Other acute disseminated demyelination, within G35-G37 Demyelinating diseases of the central nervous system, within Chapter 6: Diseases of the nervous system (G00-G99).
What coding notes apply to G36.9?
ICD-10-CA lists Excludes notes for G36.9, 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.