Viral meningitis, unspecified

This code represents an inflammation of the meninges (the membranes surrounding the brain and spinal cord) caused by a viral infection, where the specific viral etiology is not identified in the medical record. It indicates a diagnosis of viral meningitis without further specification of the causative agent.

Use this code when the documentation clearly states "viral meningitis" but does not specify the type of virus (e.g., enterovirus, herpes simplex virus, mumps virus). This code is appropriate when diagnostic testing for viral pathogens is pending, inconclusive, or not performed, and the clinician has confirmed a viral etiology.

• Avoid using this code if a specific viral pathogen is identified; instead, code to the specific viral meningitis (e.g., G02.0 for viral meningitis in other infectious and parasitic diseases classified elsewhere).
• Ensure documentation supports a viral etiology; if bacterial or other non-viral meningitis is suspected or confirmed, use the appropriate code.
• Sequence this code as the primary diagnosis when it is the reason for the encounter, unless another condition is clearly the underlying cause.