ICD-10-CM Alphabetic Index · FY 2026 18 Entries
Myelitis in the ICD-10-CM Index ICD-10-CM
The main term Myelitis (acute) (ascending) (childhood) (chronic) (descending) (diffuse) (disseminated) (idiopathic) (pressure) (progressive) (spinal cord) (subacute) carries 18 index entries pointing to 14 ICD-10-CM codes. The default entry is G04.91, 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
18
Index Entries
14
Codes Referenced
G04.91
Default Code
M
Letter
18 of 18 shown
ICD-10-CM
Index Entries Under Myelitis 18 entries · 14 codes
Myelitis (acute) (ascending) (childhood) (chronic) (descending) (diffuse) (disseminated) (idiopathic) (pressure) (progressive) (spinal cord) (subacute) G04.91
flaccid G04.82
herpes simplex B00.82
herpes zoster B02.24
in diseases classified elsewhere G05.4
necrotizing, subacute G37.4
optic neuritis in G36.0
postchickenpox B01.12
postherpetic B02.24
postimmunization G04.02
postinfectious NEC G04.89
postvaccinal G04.02
specified NEC G04.89
syphilitic (transverse) A52.14
toxic G92.9
transverse (in demyelinating diseases of central nervous system) G37.3
tuberculous A17.82
varicella B01.12
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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.
