G37.1 ICD-10-CA code: Central demyelination of corpus callosum
G37.1 is the ICD-10-CA code for “Central demyelination of corpus callosum” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
G37.1Central demyelination of corpus callosum
ICD-10-CA · Canada · Also written G371
Index terms
Entries in CIHI’s alphabetical index that lead to G37.1. Searching the index by the condition the note names is how coders reach this code.
- Marchiafava (Bignami) syndrome or disease
- Encephalopathy (acute), demyelinating callosal
- Demyelination, demyelinization, corpus callosum (central)
Notes for G37.1
As CIHI prints them, with any note G37.1 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 G37.1 sits
- 1ChapterChapter 6: Diseases of the nervous system (G00-G99)
- 2Block G35-G37Demyelinating diseases of the central nervous system
- 3Category G37Other demyelinating diseases of central nervous system
- 4Valid code G37.1Central demyelination of corpus callosum
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 G37.1 mean?
G37.1 is the ICD-10-CA code for “Central demyelination of corpus callosum” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is G37.1 in ICD-10-CA?
G37.1 sits under G37 Other demyelinating diseases of central nervous system, 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 G37.1?
ICD-10-CA lists Excludes notes for G37.1, 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 G37.1
View G37G37.0Diffuse sclerosisG37.2Central pontine myelinolysisG37.3Acute transverse myelitis in demyelinating disease of central nervous systemG37.4Subacute necrotizing myelitisG37.5Concentric sclerosis [Baló]G37.8Other specified demyelinating diseases of central nervous systemG37.9Demyelinating disease of central nervous system, unspecified