G00-G09: Inflammatory diseases of the central nervous system
G04: Encephalitis, myelitis and encephalomyelitis
Encephalitis, myelitis, and encephalomyelitis are a group of related conditions affecting the brain and the spinal cord, areas that together make up the central nervous system. The main characteristic of these conditions is inflammation which could be due to various causes, such as infections, immune system disorders, or allergic reactions. Infection-related inflammation can be caused by viruses, bacteria, or parasites. Major symptoms include fever, headache, vomiting, confusion, and seizures. In severe cases, the affected individual might also display symptoms like loss of consciousness, behavioral changes or even paralysis. These physical manifestations could result from direct damage to nervous tissue or disruption to its normal functioning due to inflammation. The course and severity of these conditions can vary. While some people may recover fully, others might experience long-term effects or complications such as memory loss, physical disabilities, or recurring seizures.
Subcodes of G04:
- G04.0: Acute disseminated encephalitis
- G04.1: Human T-cell lymphotropic virus associated myelopathy
- G04.2: Bacterial meningoencephalitis and meningomyelitis, not elsewhere classified
- G04.8: Other encephalitis, myelitis and encephalomyelitis
- G04.9: Encephalitis, myelitis and encephalomyelitis, unspecified
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The information provided on this page is for general educational purposes only. It is not intended for self-diagnosis and does not replace professional medical advice. Always consult your doctor or a qualified healthcare provider with any questions or concerns about your health.
If you see an ICD diagnosis code (e.g., on a medical report), be aware that doctors may also include additional indicators to express diagnostic certainty. Only a healthcare professional can interpret these codes accurately in the context of your individual case.
For a complete understanding of your condition and what the diagnosis means for you, please speak directly with your doctor.