G04.3

Non-Billable
ChapterG00–G99
Ranksubcategory
Official Description

Acute necrotizing hemorrhagic encephalopathy

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 6: Diseases of the Nervous System (G00-G99).

Instructional Notes

Excludes1(Not coded here)
  • acute disseminated encephalitis and encephalomyelitis (G04.0-)
General instructions are available for the parent sections:
View CH6 NotesView G04 Notes

Clinical Hierarchy

CH6Diseases of the nervous system (G00-G99)
G00-G09Inflammatory diseases of the central nervous system (G00-G09)
G04Encephalitis, myelitis and encephalomyelitis
G04.3Acute necrotizing hemorrhagic encephalopathy
G04.30Acute necrotizing hemorrhagic encephalopathy, unspecified
G04.31Postinfectious acute necrotizing hemorrhagic encephalopathy
G04.32Postimmunization acute necrotizing hemorrhagic encephalopathy
G04.39Other acute necrotizing hemorrhagic encephalopathy

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to G04.3:

categoryG04
Encephalitis, myelitis and encephalomyelitis
View context instructions
chapterCH6
Diseases of the nervous system (G00-G99)
View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to G04.3. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

12 raw paths
Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute)4 unique routes
acute(4 variants)
necrotizing hemorrhagic→G04.3(4 variants)
postimmunization→G04.3
postinfectious→G04.3
specified NEC→G04.3
Encephalomyelitis4 unique routes
acute necrotizing hemorrhagic→G04.3(4 variants)
postimmunization→G04.3
postinfectious→G04.3
specified NEC→G04.3
Encephalopathy (acute)4 unique routes
acute necrotizing hemorrhagic→G04.3(4 variants)
postimmunization→G04.3
postinfectious→G04.3
specified NEC→G04.3

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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