MCMedicalCodingSoftware
G04.3

G04.3: Acute necrotizing hemorrhagic encephalopathy

Non-billable headerICD-10-CM

G04.3 is a non-billable header ICD-10-CM code for acute necrotizing hemorrhagic encephalopathy. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1: never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

  • acute disseminated encephalitis and encephalomyelitis (G04.0-)

Excludes1 inherited from the categories above G04.3

A category’s note binds every code beneath it.

Written on G04: Encephalitis, myelitis and encephalomyelitis

Excludes2 inherited from the categories above G04.3

Not part of this code, but both may be coded when both are present.

Written on G04: Encephalitis, myelitis and encephalomyelitis

  • acute transverse myelitis (G37.3)
  • alcoholic encephalopathy (G31.2)
  • multiple sclerosis (G35-)
  • myalgic encephalomyelitis (G93.32)
  • subacute necrotizing myelitis (G37.4)
  • toxic encephalitis (G92.8)
  • toxic encephalopathy (G92.8)

Other codes that can never be billed with G04.3

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • G03Meningitis due to other and unspecified causes
  • G04.0Acute disseminated encephalitis and encephalomyelitis (ADEM)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead G04.3

4 child codes. Green means billable.

Other codes under G04

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.