All ICD10 Codes

G05

Non-Billable
ChapterG00–G99
Rankcategory
Description

Encephalitis, myelitis and encephalomyelitis in diseases classified elsewhere

About ICD-10-CM code G05

G05 is the ICD-10-CM diagnosis code for Encephalitis, myelitis and encephalomyelitis in diseases classified elsewhere. It sits in G00-G99 Diseases of the Nervous System, within Inflammatory diseases of the central nervous system (G00-G09). G05 is not billable on its own, coders must choose one of its more specific child codes instead.

Use a more specific code (2 billable)
G05.3Encephalitis and encephalomyelitis in diseases classified elsewhereG05.4Myelitis in diseases classified elsewhere
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 6: Diseases of the Nervous System (G00-G99).

CH6 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Instructional Notes

Excludes1(Not coded here. Use a different 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)
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)

Clinical Hierarchy

BillableHas subcodes
CH6Diseases of the nervous system (G00-G99)
G00-G09Inflammatory diseases of the central nervous system (G00-G09)
G05Encephalitis, myelitis and encephalomyelitis in diseases classified elsewhereNot billable
G05.3Encephalitis and encephalomyelitis in diseases classified elsewhereBillable
G05.4Myelitis in diseases classified elsewhereBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to G05:

chapterCH6
Diseases of the nervous system (G00-G99)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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