G04.90
BillableEncephalitis and encephalomyelitis, unspecified
Encephalitis and encephalomyelitis, unspecified
Coding Notes
Inclusion Terms
Alternative clinical terms for this condition
- Ventriculitis (cerebral) NOS
Includes
Conditions included under this code
- acute ascending myelitis
- meningoencephalitis
- meningomyelitis
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
Excludes 2
Conditions not included here, but the patient may have both
- •certain conditions originating in the perinatal periodP04-P96
- •certain infectious and parasitic diseasesA00-B99
- •complications of pregnancy, childbirth and the puerperiumO9A)O00
- •congenital malformations, deformations, and chromosomal abnormalitiesQ00-Q99
- •endocrine, nutritional and metabolic diseasesE00-E88
- •injury, poisoning and certain other consequences of external causesS00-T88
- •neoplasmsC00-D49
- •symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classifiedR00-R94
- •acute transverse myelitisG37.3
- •alcoholic encephalopathyG31.2
- •multiple sclerosisG35
- •myalgic encephalomyelitisG93.32
- •subacute necrotizing myelitisG37.4
- •toxic encephalitisG92.8
- •toxic encephalopathyG92.8
Related Codes(1)
Also Known As / Clinical Terms(96)
SNOMED CT
- Meningoencephalitis7125002
- Meningoencephalomyelitis29197009
- Granular ependymitis33346005
- Encephalitis45170000
- Encephalomyelitis62950007
- Ependymitis71981002
- Meningomyelitis74772000
- Infectious disease of brain128614008
- Bacterial ventriculitis230158001
- Bacterial ventriculitis, brain230158001
- Malignant ventriculitis230160004
- Malignant ventriculitis, brain230160004
- Focal encephalitis230189002
- Brainstem encephalitis230190006
- Situation-related seizures230431001
- Encephalitis, myelitis and encephalomyelitis267576008
- Infective encephalitis312215006
- Infective ventriculitis312217003
- Infective ventriculitis, brain312217003
- Seizures complicating infection371115001
- Primary encephalitis406573001
- Infection caused by Mycoplasma pneumoniae406595002
- Bacterial myelitis721245001
- Myelitis caused by bacterium721245001
- Infection causing encephalomyelitis721249007
- Infectious encephalomyelitis721249007
- Epilepsy due to infectious disease of central nervous system724549005
- Encephalitis caused by Mycoplasma pneumoniae764993001
- Mycoplasma pneumoniae encephalitis764993001
- Burkholderia encephalomyelitis838315004
- Encephalomyelitis caused by Burkholderia838315004
- Epilepsy due to infectious encephalitis860804005
- Infectious encephalitis epilepsy860804005
- Bacterial encephalomyelitis860841006
- Encephalomyelitis caused by bacterium860841006
- Chorea due to and following encephalitis1163149009
- Post-encephalitic chorea1163149009
- Autonomic disorder due to encephalitis1259060008
- Disorder of autonomic nervous system due to encephalitis1259060008
- Dystonia due to encephalitis1260343000
- Acute encephalitis822021000000103
- Ventriculitis of the brain89441000119109
UMLS
Clinical Terms
- Infection caused by Mycoplasma pneumoniae
- Focal encephalitis
- Bacterial ventriculitis
- Meningomyelitis
- Autonomic disorder due to encephalitis
- Infective encephalitis
- Encephalitis caused by Mycoplasma pneumoniae
- Meningoencephalitis
- Meningoencephalomyelitis
- Burkholderia encephalomyelitis
- Granular ependymitis
- Ventriculitis, Cerebral
- Encephalitis
- Ventriculitis of the brain
- Ependymitis
- Bacterial myelitis
- Encephalomyelitis
- Infectious encephalomyelitis
- Malignant ventriculitis, brain
- Infectious encephalitis epilepsy
- Bacterial encephalomyelitis
- Ventriculitis
- Encephalomyelitis caused by bacterium
- Epilepsy due to infectious encephalitis
- Malignant ventriculitis
- Cerebral Ventriculitides
- Ventriculitides, Cerebral
- Infective ventriculitis
- Post-encephalitic chorea
- Infectious disease of brain
- Disorder of autonomic nervous system due to encephalitis
- Ventriculitis (cerebral) NOS
- Dystonia due to encephalitis
- Infection causing encephalomyelitis
- Infective ventriculitis, brain
- Cerebral Ventriculitis
- Encephalomyelitis caused by Burkholderia
- Brainstem encephalitis
- Situation-related seizures
- Primary encephalitis
- Seizures complicating infection
- Acute encephalitis
- Chorea due to and following encephalitis
- Mycoplasma pneumoniae encephalitis
- Epilepsy due to infectious disease of central nervous system
- Bacterial ventriculitis, brain
- Myelitis caused by bacterium
Frequently Asked Questions
What is the ICD-10 code for encephalitis and encephalomyelitis, unspecified?
The ICD-10-CM code for encephalitis and encephalomyelitis, unspecified is G04.90. The full clinical description is "Encephalitis and encephalomyelitis, unspecified". G04.90 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code G04.90 mean?
ICD-10-CM code G04.90 represents “Encephalitis and encephalomyelitis, unspecified”. It is classified under Chapter 6: Diseases of the Nervous System and is a billable/specific code that can be used on a claim.
Is G04.90 a billable code?
Yes, G04.90 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is G04.90 in?
G04.90 is in Chapter 6: Diseases of the Nervous System (codes G00-G99).
What codes cannot be used with G04.90?
G04.90 has Excludes1 notes indicating codes that cannot be used together with it, including: encephalopathy NOS (G93.40).
What SNOMED CT codes does G04.90 map to?
G04.90 maps to 31 SNOMED CT concepts: 822021000000103, 1259060008, 860841006, 721245001, 230158001, and 26 more. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for G04.90?
G04.90 is linked to 2 UMLS Concept Unique Identifiers: C1455718, C2875025. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does G04.90 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like encephalitis and encephalomyelitis, unspecified affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of G04.90?
There is no direct ICD-11 mapping available for G04.90 in the WHO crosswalk tables. This may mean the concept is classified differently in ICD-11. Use the ICD-10 to ICD-11 converter to search for related codes.
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.