G05.1 ICD-10-CA code: Encephalitis, myelitis and encephalomyelitis in viral diseases classified elsewhere
G05.1 is the ICD-10-CA code for “Encephalitis, myelitis and encephalomyelitis in viral diseases classified elsewhere” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
G05.1Encephalitis, myelitis and encephalomyelitis in viral diseases classified elsewhere
Short description: Encephalit &/or myelitis viral dis cl/e
ICD-10-CA · Canada · Also written G051
Notes for G05.1
As CIHI prints them, with any note G05.1 takes from the headings above it.
Includes
- Encephalitis, myelitis or encephalomyelitis (in):• adenoviral (A85.1†)• cytomegaloviral (B25.8†)• enteroviral (A85.0†)• herpesviral [herpes simplex] (B00.4†)• influenza:• seasonal virus identified (J10.8†)• virus not identified (J11.8†)• zoonotic or pandemic virus identified (J09†)• measles (B05.0†)• mumps (B26.2†)• post chickenpox (B01.1†)• rubella (B06.0†)• zoster (B02.0†)
- Meningoencephalitis and meningomyelitis in diseases classified elsewhereFrom G05 Encephalitis, myelitis and encephalomyelitis in diseases classified elsewhere
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 G05.1 sits
- 1ChapterChapter 6: Diseases of the nervous system (G00-G99)
- 2Block G00-G09Inflammatory diseases of the central nervous system
- 3Category G05Encephalitis, myelitis and encephalomyelitis in diseases classified elsewhere
- 4Valid code G05.1Encephalitis, myelitis and encephalomyelitis in viral diseases classified elsewhere
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 G05.1 mean?
G05.1 is the ICD-10-CA code for “Encephalitis, myelitis and encephalomyelitis in viral diseases classified elsewhere” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is G05.1 in ICD-10-CA?
G05.1 sits under G05 Encephalitis, myelitis and encephalomyelitis in diseases classified elsewhere, within G00-G09 Inflammatory diseases of the central nervous system, within Chapter 6: Diseases of the nervous system (G00-G99).
What coding notes apply to G05.1?
ICD-10-CA lists Includes, Excludes notes for G05.1, 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.