Other specified viral infections of central nervous system

This code signifies a viral infection affecting the brain, spinal cord, or meninges that is not specifically classified elsewhere. It encompasses a range of viral etiologies causing central nervous system (CNS) inflammation or dysfunction, such as certain types of encephalitis, meningitis, or myelitis, when a more specific ICD-10-CM code for the identified virus is unavailable.

Use this code when documentation clearly indicates a viral infection of the CNS, but the specific viral agent is either unknown, not definitively identified, or does not have a dedicated ICD-10-CM code. This applies to cases where the physician has diagnosed a viral CNS infection, but the specific virus is not listed under categories A80-A87.

• Always attempt to identify the specific viral agent first; if known, a more specific code from categories A80-A87 should be used.
• Ensure documentation explicitly states "viral" and "central nervous system" involvement.
• Do not use this code for bacterial, fungal, or parasitic CNS infections; refer to appropriate codes for those etiologies.