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Diagnosis Code

G04.90 ENCEPHALITIS AND ENCEPHALOMYELITIS, UNSPECIFIED


Code Information

Diagnosis Code: G04.90

Short Description: Encephalitis and encephalomyelitis, unspecified

Long Description: Encephalitis and encephalomyelitis, unspecified

The code G04.90 is VALID for claim submission

Code Classification:

  • Diseases of the nervous system (G00–G99)
    • Inflammatory diseases of the central nervous system (G00-G09)
      • Encephalitis, myelitis and encephalomyelitis (G04)
        • G04.90 Encephalitis and encephalomyelitis, unspecified

Code Version: 2022 ICD-10-CM


Synonyms

  • Acute encephalitis
  • Autonomic disorder due to encephalitis
  • Bacterial ventriculitis
  • Brainstem encephalitis
  • Chorea due to and following encephalitis
  • Encephalitis
  • Encephalitis, myelitis and encephalomyelitis
  • Encephalomyelitis
  • Encephalomyelitis caused by bacterium
  • Encephalomyelitis caused by Burkholderia
  • Ependymitis
  • Epilepsy due to infectious disease of central nervous system
  • Epilepsy due to infectious encephalitis
  • Focal encephalitis
  • Granular ependymitis
  • Infection causing encephalomyelitis
  • Infection causing encephalomyelitis
  • Infection causing encephalomyelitis
  • Infection due to Mycoplasma pneumoniae
  • Infectious disease of brain
  • Infective encephalitis
  • Infective ventriculitis
  • Infective ventriculitis
  • Malignant ventriculitis
  • Meningoencephalitis
  • Meningoencephalomyelitis
  • Meningomyelitis
  • Mycoplasma pneumoniae encephalitis
  • Myelitis caused by bacterium
  • Myelitis caused by bacterium
  • Primary encephalitis
  • Seizures complicating infection
  • Situation-related seizures
  • Ventriculitis of the brain

References to Index of Diseases and Injuries

The code G04.90 has the following ICD-10-CM references to the Index of Diseases and Injuries
  • Inclusion Terms:
    • Ventriculitis (cerebral) NOS

Crosswalk Information

ICD-10 Code ICD-9 Code ICD-9 Description
G04.90 Right Arrow 323.9 Encephalitis NOS

This ICD-10 to ICD-9 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-10 Code ICD-10 Description
G04 Encephalitis, myelitis and encephalomyelitis
G04.0 Acute disseminated encephalitis and encephalomyelitis (ADEM)
G04.00 Acute disseminated encephalitis and encephalomyelitis, unspecified
G04.01 Postinfectious acute disseminated encephalitis and encephalomyelitis (postinfectious ADEM)
G04.02 Postimmunization acute disseminated encephalitis, myelitis and encephalomyelitis
G04.1 Tropical spastic paraplegia
G04.2 Bacterial meningoencephalitis and meningomyelitis, not elsewhere classified
G04.3 Acute necrotizing hemorrhagic encephalopathy
G04.30 Acute necrotizing hemorrhagic encephalopathy, unspecified
G04.31 Postinfectious acute necrotizing hemorrhagic encephalopathy
G04.32 Postimmunization acute necrotizing hemorrhagic encephalopathy
G04.39 Other acute necrotizing hemorrhagic encephalopathy
G04.8 Other encephalitis, myelitis and encephalomyelitis
G04.81 Other encephalitis and encephalomyelitis
G04.82 Acute flaccid myelitis
G04.89 Other myelitis
G04.9 Encephalitis, myelitis and encephalomyelitis, unspecified
G04.91 Myelitis, unspecified

This page was last updated on: 10/1/2023

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