Herpesviral encephalitis
Chapter 1:Certain infectious and parasitic diseases
ICD-10 B00.5 is a billable code used to indicate a diagnosis of herpesviral encephalitis.
Herpesviral encephalitis is a severe neurological condition primarily caused by the herpes simplex virus (HSV), most commonly HSV-1. It is characterized by inflammation of the brain, leading to symptoms such as fever, headache, seizures, confusion, and altered mental status. The condition can progress rapidly, often resulting in significant morbidity and mortality if not treated promptly. Diagnosis typically involves clinical evaluation, imaging studies such as MRI, and laboratory tests including PCR for HSV DNA in cerebrospinal fluid (CSF). Treatment usually consists of antiviral therapy, primarily acyclovir, which is most effective when initiated early in the course of the disease. Complications can include long-term neurological deficits, seizures, and in severe cases, death. Vaccination against HSV is not currently available, making awareness and early intervention critical in managing this condition.
Detailed neurological examination findings, imaging results, and laboratory tests.
Patients presenting with acute onset of seizures, altered mental status, or fever.
Ensure thorough documentation of neurological deficits and response to treatment.
History of exposure, laboratory confirmation of HSV, and treatment protocols.
Patients with suspected viral encephalitis requiring antiviral therapy.
Document any co-infections and the rationale for antiviral choice.
Used for confirming diagnosis in suspected cases of herpesviral encephalitis.
Document the clinical rationale for testing and results.
Ensure that the testing aligns with the clinical presentation.
Common symptoms include fever, headache, seizures, confusion, and altered mental status. Patients may also exhibit focal neurological deficits.
