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2025 ICD-10-CM code A39.81

Meningococcal encephalitis, a serious bacterial infection causing inflammation of the brain.

Use additional code to identify resistance to antimicrobial drugs (Z16.-). Do not use this code for carrier status (Z22.-) or infections during pregnancy or the perinatal period (O98.-, P35-P39).

Medical necessity is established by the presence of clinical findings consistent with meningococcal encephalitis, confirmed through laboratory and imaging studies.Prompt treatment is crucial to prevent serious complications.

The provider diagnoses meningococcal encephalitis based on patient history, symptoms, physical examination, and laboratory results (blood culture and cerebrospinal fluid analysis).Treatment includes antibiotics and supportive care.

In simple words: Meningococcal encephalitis is a dangerous brain infection caused by bacteria.It's a complication of meningococcal disease and can be spread through close contact like coughing or kissing.

Meningococcal encephalitis is a complication of meningococcal disease, a severe bacterial infection caused by Neisseria meningitidis. This infection leads to inflammation of the brain, and is transmitted through close contact with an infected person.

Example 1: A college student presents with flu-like symptoms, a stiff neck, and altered mental status.Testing reveals meningococcal infection and brain inflammation, confirming meningococcal encephalitis., A military recruit develops a severe headache, fever, and sensitivity to light.After a lumbar puncture and blood tests, they are diagnosed with meningococcal encephalitis., A child exhibits sudden confusion, seizures, and difficulty speaking.Diagnostic tests indicate a meningococcal infection affecting the brain, leading to a diagnosis of meningococcal encephalitis.

Documentation should include signs and symptoms, history of exposure, laboratory findings (CSF analysis, blood cultures), imaging results (CT, MRI), and treatment details.

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