Rubella encephalitis

This code signifies inflammation of the brain caused by the rubella virus. It represents a rare but serious neurological complication that can arise from a rubella infection, characterized by symptoms such as fever, headache, altered mental status, and seizures.

Assign this code when documentation clearly indicates a diagnosis of encephalitis directly attributed to a rubella infection. This typically requires laboratory confirmation of rubella and clinical evidence of central nervous system inflammation. It is appropriate for both acute and subacute presentations of rubella-induced encephalopathy.

• Ensure documentation explicitly links the encephalitis to a rubella infection, not just a history of rubella.
• Do not confuse with post-infectious encephalomyelitis, which has a different etiology.
• Code any associated neurological manifestations or sequelae separately, if applicable and documented.