ICD-10 Diagnosis Code B26.2

Mumps encephalitis

Diagnosis Code B26.2

ICD-10: B26.2
Short Description: Mumps encephalitis
Long Description: Mumps encephalitis
This is the 2017 version of the ICD-10-CM diagnosis code B26.2

Code Classification
  • Certain infectious and parasitic diseases
    • Other viral diseases (B25-B34)
      • Mumps (B26)

Information for Patients


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
  • CSF analysis
  • Encephalitis
  • Japanese Encephalitis Vaccine: What You Need to Know (Centers for Disease Control and Prevention)
  • Subacute sclerosing panencephalitis

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Mumps is an illness caused by the mumps virus. It starts with

  • Fever
  • Headache
  • Muscle aches
  • Tiredness
  • Loss of appetite

After that, the salivary glands under the ears or jaw become swollen and tender. The swelling can be on one or both sides of the face. Symptoms last 7 to 10 days. Serious complications are rare.

You can catch mumps by being with another person who has it. There is no treatment for mumps, but the measles-mumps-rubella (MMR) vaccine can prevent it.

Before the routine vaccination program in the United States, mumps was a common illness in infants, children and young adults. Now it is a rare disease in the U.S.

Centers for Disease Control and Prevention

  • MMR (Measles, Mumps and Rubella) Vaccine: What You Need to Know (Centers for Disease Control and Prevention)
  • MMRV (Measles, Mumps, Rubella, and Varicella) Vaccine: What You Need to Know (Centers for Disease Control and Prevention)
  • Mumps
  • Mumps: Information for Parents (American Academy of Family Physicians)
  • Mumps: Information for Parents (American Academy of Pediatrics)
  • Mumps: Information for Parents (Centers for Disease Control and Prevention)
  • Orchitis

[Read More]
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