G05 ICD-10-CM Code: Encephalitis, myelitis and encephalomyelitis in diseases classified elsewhere
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
G05Encephalitis, myelitis and encephalomyelitis in diseases classified elsewhere
ICD-10-CM diagnosis code · United States clinical modification
Where G05 sits
- 1
Chapter 6
Diseases of the nervous system (G00-G99)
- 2
Section
Inflammatory diseases of the central nervous system (G00-G09)
- 3
Category G05
Encephalitis, myelitis and encephalomyelitis in diseases classified elsewhere
- 4
Code G05
Encephalitis, myelitis and encephalomyelitis in diseases classified elsewhere
Codes under G05
G05 is a non-billable category. Choose the child code that best matches the documented diagnosis.
Notes for this code
Inclusion terms
No inclusion terms are listed for G05.
Code first
- underlying disease, such as:
- congenital toxoplasmosis encephalitis, myelitis and encephalomyelitis (P37.1)
- cytomegaloviral encephalitis, myelitis and encephalomyelitis (B25.8)
- encephalitis, myelitis and encephalomyelitis (in) systemic lupus erythematosus (M32.19)
- eosinophilic meningoencephalitis (B83.2)
- human immunodeficiency virus [HIV] disease (B20)
- poliovirus (A80.-)
- suppurative otitis media (H66.01-H66.4)
- systemic lupus erythematosus (M32.19)
- trichinellosis (B75)
Use additional code
No “use additional code” instruction is listed for G05.
Excludes1
Conditions that should not be reported together with this code.
- adenoviral encephalitis, myelitis and encephalomyelitis (A85.1)
- encephalitis, myelitis and encephalomyelitis (in) measles (B05.0)
- enteroviral encephalitis, myelitis and encephalomyelitis (A85.0)
- herpesviral [herpes simplex] encephalitis, myelitis and encephalomyelitis (B00.4)
- listerial encephalitis, myelitis and encephalomyelitis (A32.12)
- meningococcal encephalitis, myelitis and encephalomyelitis (A39.81)
- mumps encephalitis, myelitis and encephalomyelitis (B26.2)
- postchickenpox encephalitis, myelitis and encephalomyelitis (B01.1-)
- rubella encephalitis, myelitis and encephalomyelitis (B06.01)
- toxoplasmosis encephalitis, myelitis and encephalomyelitis (B58.2)
- zoster encephalitis, myelitis and encephalomyelitis (B02.0)
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for G05.
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code G05 mean?
G05 is the FY 2027 U.S. ICD-10-CM code for “Encephalitis, myelitis and encephalomyelitis in diseases classified elsewhere.”
Is G05 a billable or specific ICD-10-CM code?
No. G05 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is G05 located in ICD-10-CM?
G05 is listed in Chapter 6, Diseases of the nervous system (G00-G99), within Inflammatory diseases of the central nervous system (G00-G09) (G00–G09), under category G05, Encephalitis, myelitis and encephalomyelitis in diseases classified elsewhere.
What coding notes are listed for G05?
No inclusion terms are listed for G05 in this reference record. Code-first instructions: underlying disease, such as:; congenital toxoplasmosis encephalitis, myelitis and encephalomyelitis (P37.1); cytomegaloviral encephalitis, myelitis and encephalomyelitis (B25.8); encephalitis, myelitis and encephalomyelitis (in) systemic lupus erythematosus (M32.19); eosinophilic meningoencephalitis (B83.2); human immunodeficiency virus [HIV] disease (B20); poliovirus (A80.-); suppurative otitis media (H66.01-H66.4); systemic lupus erythematosus (M32.19); trichinellosis (B75). Excludes1 notes: adenoviral encephalitis, myelitis and encephalomyelitis (A85.1); encephalitis, myelitis and encephalomyelitis (in) measles (B05.0); enteroviral encephalitis, myelitis and encephalomyelitis (A85.0); herpesviral [herpes simplex] encephalitis, myelitis and encephalomyelitis (B00.4); listerial encephalitis, myelitis and encephalomyelitis (A32.12); meningococcal encephalitis, myelitis and encephalomyelitis (A39.81); mumps encephalitis, myelitis and encephalomyelitis (B26.2); postchickenpox encephalitis, myelitis and encephalomyelitis (B01.1-); rubella encephalitis, myelitis and encephalomyelitis (B06.01); toxoplasmosis encephalitis, myelitis and encephalomyelitis (B58.2); zoster encephalitis, myelitis and encephalomyelitis (B02.0). No Excludes2 note is listed.