I: Certain infectious and parasitic diseases
A80-A89: Viral infections of the central nervous system
Viral infections of the central nervous system (CNS) are a group of conditions caused by various types of viruses that invade the CNS, which includes the brain and spinal cord. These infections may be spread through direct contact, ingestion, or even through the air by coughing or sneezing. Common symptoms usually begin with fever, headache, and fatigue, which may progress to more severe symptoms like confusion, seizures, or paralysis, depending on the specific infection and its location within the CNS. This progression can occur rapidly over hours to a few days, or may be slower, over weeks. The severity and course of symptoms can vary greatly, from mild and self-limiting to severe and potentially fatal, depending on the virus involved and the individual's overall health.
Subcodes of A80-A89:
- A80: Acute poliomyelitis
- A81: Atypical virus infections of central nervous system
- A82: Rabies
- A83: Mosquito-borne viral encephalitis
- A84: Tick-borne viral encephalitis
- A85: Other viral encephalitis, not elsewhere classified
- A86: Unspecified viral encephalitis
- A87: Viral meningitis
- A88: Other viral infections of central nervous system, not elsewhere classified
- A89: Unspecified viral infection of central nervous system
Patient Disclaimer
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.