G05.3
Encephalitis and encephalomyelitis in diseases classified elsewhere
Billable FY2026 2025-10-01 → 2026-09-30
Exclusions 19 never code together
G05code
Excludes1
- adenoviral encephalitis, myelitis and encephalomyelitis (A85.1)A85.1
- encephalitis, myelitis and encephalomyelitis (in) measles (B05.0)B05.0
- enteroviral encephalitis, myelitis and encephalomyelitis (A85.0)A85.0
- herpesviral [herpes simplex] encephalitis, myelitis and encephalomyelitis (B00.4)B00.4
- listerial encephalitis, myelitis and encephalomyelitis (A32.12)A32.12
- meningococcal encephalitis, myelitis and encephalomyelitis (A39.81)A39.81
- mumps encephalitis, myelitis and encephalomyelitis (B26.2)B26.2
- postchickenpox encephalitis, myelitis and encephalomyelitis (B01.1-)B01.1-
- rubella encephalitis, myelitis and encephalomyelitis (B06.01)B06.01
- toxoplasmosis encephalitis, myelitis and encephalomyelitis (B58.2)B58.2
- zoster encephalitis, myelitis and encephalomyelitis (B02.0)B02.0
G00-G99chapter
Excludes2
- certain conditions originating in the perinatal period (P04-P96)P04-P96
- certain infectious and parasitic diseases (A00-B99)A00-B99
- complications of pregnancy, childbirth and the puerperium (O00-O9A)O00-O9A
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)Q00-Q99
- endocrine, nutritional and metabolic diseases (E00-E88)E00-E88
- injury, poisoning and certain other consequences of external causes (S00-T88)S00-T88
- neoplasms (C00-D49)C00-D49
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)R00-R94
Excludes1 — never code together. The excluded condition and this one are mutually exclusive.
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes 12
G05.3code
Inclusion terms
- Meningoencephalitis in diseases classified elsewhere
Code first
- underlying disease
G05code
Code first
- underlying disease, such as:
- congenital toxoplasmosis encephalitis, myelitis and encephalomyelitis (P37.1)P37.1
- cytomegaloviral encephalitis, myelitis and encephalomyelitis (B25.8)B25.8
- encephalitis, myelitis and encephalomyelitis (in) systemic lupus erythematosus (M32.19)M32.19
- eosinophilic meningoencephalitis (B83.2)B83.2
- human immunodeficiency virus [HIV] disease (B20)B20
- poliovirus (A80.-)A80.-
- suppurative otitis media (H66.01-H66.4)H66.01-H66.4
- systemic lupus erythematosus (M32.19)M32.19
- trichinellosis (B75)B75
Index entries leading here 2
Alongside this code 1 same parent — G05
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.