ICD-10-CM Alphabetic Index · FY 2026 25 Entries
Encephalomyelitis in the ICD-10-CM Index ICD-10-CM
The main term Encephalomyelitis carries 25 index entries pointing to 18 ICD-10-CM codes. The default entry is G04.90, the code the bare main term maps to; every indented line below refines the term by site, cause, or type. Verify any candidate code in the Tabular List before using it.
✓ Built from the official CMS FY 2026 index fileEffective Oct 1, 2025 – Sep 30, 2026
25
Index Entries
18
Codes Referenced
G04.90
Default Code
E
Letter
25 of 25 shown
ICD-10-CM
Index Entries Under Encephalomyelitis 25 entries · 18 codes
Encephalomyelitis G04.90
acute disseminated G04.00
infectious G04.01
noninfectious G04.81
postimmunization G04.02
postinfectious G04.01
acute necrotizing hemorrhagic G04.30
postimmunization G04.32
postinfectious G04.31
specified NEC G04.39
equine A83.9
Eastern A83.2
Venezuelan A92.2
Western A83.1
in diseases classified elsewhere G05.3
myalgic G93.32
chronic fatigue syndrome [ME/CFS] G93.32
postchickenpox B01.11
postinfectious NEC G04.01
postmeasles B05.0
postvaccinal G04.02
postvaricella B01.11
rubella B06.01
specified NEC G04.81
Venezuelan equine A92.2
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Related Index Terms
Source: Centers for Medicare & Medicaid Services, FY 2026 ICD-10-CM Index to Diseases and Injuries release files, effective October 1, 2025 through September 30, 2026.
