Rocio virus disease

This code represents a rare arboviral infection caused by the Rocio virus, primarily affecting the central nervous system. It typically manifests as an acute encephalitis, characterized by fever, headache, vomiting, and neurological symptoms such as seizures, tremors, and altered mental status. The disease can lead to significant neurological sequelae or, in severe cases, death.

Use this code when documentation confirms a diagnosis of Rocio virus disease, often following laboratory confirmation of the virus. This diagnosis is typically made in patients presenting with symptoms of viral encephalitis, particularly in endemic regions of Brazil where the virus is known to circulate. Documentation should clearly indicate the specific viral etiology.

• Ensure documentation explicitly states "Rocio virus" to support this specific code. Do not use for other unspecified viral encephalitides.
• Consider co-coding for any associated neurological complications or sequelae, such as epilepsy or cognitive deficits, if they are present and documented.
• Verify the geographic context of the patient's exposure, as Rocio virus is geographically restricted.