ICD-10-CM Code G04.9

Encephalitis, myelitis and encephalomyelitis, unspecified

Version 2021 Non-Billable Code

Not Valid for Submission

G04.9 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of encephalitis, myelitis and encephalomyelitis, unspecified. The code is NOT valid for the year 2021 for the submission of HIPAA-covered transactions.

ICD-10:G04.9
Short Description:Encephalitis, myelitis and encephalomyelitis, unspecified
Long Description:Encephalitis, myelitis and encephalomyelitis, unspecified

Consider the following ICD-10 codes with a higher level of specificity:

  • G04.90 - Encephalitis and encephalomyelitis, unspecified
  • G04.91 - Myelitis, unspecified

Code Classification

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

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021

Information for Patients


Encephalitis

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

  • Cerebral spinal fluid (CSF) collection (Medical Encyclopedia)
  • CSF analysis (Medical Encyclopedia)
  • Encephalitis (Medical Encyclopedia)
  • Japanese Encephalitis Vaccine: What You Need to Know (Centers for Disease Control and Prevention)
  • Subacute sclerosing panencephalitis (Medical Encyclopedia)

[Learn More]

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.

  • Epidural abscess (Medical Encyclopedia)
  • Spinal cord abscess (Medical Encyclopedia)
  • Spinal tumor (Medical Encyclopedia)
  • Subacute combined degeneration (Medical Encyclopedia)
  • Syphilitic myelopathy (Medical Encyclopedia)

[Learn More]