Version 2024

2024 ICD-10-CM Diagnosis Code G05

Encephalitis, myelitis and encephalomyelitis in diseases classified elsewhere

ICD-10-CM Code:
ICD-10 Code for:
Encphlts, myelitis & encephalomyelitis in dis classd elswhr
Is Billable?
Not Valid for Submission
Code Navigator:

Code Classification

  • Diseases of the nervous system
    • Inflammatory diseases of the central nervous system
      • Encephalitis, myelitis and encephalomyelitis in diseases classified elsewhere

G05 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of encephalitis, myelitis and encephalomyelitis in diseases classified elsewhere. The code is not specific and is NOT valid for the year 2024 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding Applicable to Encphlts, myelitis & encephalomyelitis in dis classd elswhr

Non-specific codes like G05 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10-CM codes with a higher level of specificity when coding for encphlts, myelitis & encephalomyelitis in dis classd elswhr:

  • Use G05.3 for Encephalitis and encephalomyelitis in diseases classified elsewhere - BILLABLE CODE

  • Use G05.4 for Myelitis in diseases classified elsewhere - BILLABLE CODE

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.

Code First

Code First
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
  • underlying disease, such as:
  • congenital toxoplasmosis encephalitis, myelitis and encephalomyelitis P37.1
  • cytomegaloviral encephalitis, myelitis and encephalomyelitis B25.8
  • encephalitis, myelitis and encephalomyelitis in systemic lupus erythematosus M32.19
  • eosinophilic meningoencephalitis B83.2
  • human immunodeficiency virus HIV disease B20
  • poliovirus A80
  • suppurative otitis media H66.01 H66.4
  • systemic lupus erythematosus M32.19
  • trichinellosis B75

Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • adenoviral encephalitis, myelitis and encephalomyelitis A85.1
  • encephalitis, myelitis and encephalomyelitis in measles B05.0
  • enteroviral encephalitis, myelitis and encephalomyelitis A85.0
  • herpesviral herpes simplex encephalitis, myelitis and encephalomyelitis B00.4
  • listerial encephalitis, myelitis and encephalomyelitis A32.12
  • meningococcal encephalitis, myelitis and encephalomyelitis A39.81
  • mumps encephalitis, myelitis and encephalomyelitis B26.2
  • postchickenpox encephalitis, myelitis and encephalomyelitis B01.1
  • rubella encephalitis, myelitis and encephalomyelitis B06.01
  • toxoplasmosis encephalitis, myelitis and encephalomyelitis B58.2
  • zoster encephalitis, myelitis and encephalomyelitis B02.0

Patient Education


Encephalitis is an inflammation of the brain. Usually the cause is a viral infection, but bacteria can also cause it. It can be mild or severe. Most cases are mild. You may have flu-like symptoms. With a mild case, you may just need rest, plenty of fluids, and a pain reliever.

Severe cases need immediate treatment. Symptoms of severe cases include:

  • Severe headache
  • Sudden fever
  • Drowsiness
  • Vomiting
  • Confusion
  • Seizures

In babies, additional symptoms may include constant crying, poor feeding, body stiffness, and bulging in the soft spots of the skull.

Severe cases may require a stay in the hospital. Treatments include oral and intravenous (IV) medicines to reduce inflammation and treat infection. Patients with breathing difficulties may need artificial respiration. Some people may need physical, speech, and occupational therapy once the illness is under control.

NIH: National Institute of Neurological Disorders and Stroke

[Learn More in MedlinePlus]

Spinal Cord Diseases

Your spinal cord is a bundle of nerves that runs down the middle of your back. It carries signals back and forth between your body and your brain. It is protected by your vertebrae, which are the bone disks that make up your spine. If you have an accident that damages the vertebrae or other parts of the spine, this can also injure the spinal cord. Other spinal cord problems include:

  • Tumors
  • Infections such as meningitis and polio
  • Inflammatory diseases
  • Autoimmune diseases
  • Degenerative diseases such as amyotrophic lateral sclerosis and spinal muscular atrophy

Symptoms vary but might include pain, numbness, loss of sensation and muscle weakness. These symptoms can occur around the spinal cord, and also in other areas such as your arms and legs. Treatments often include medicines and surgery.

[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.