Listerial meningitis

This code identifies an infection of the meninges, the membranes surrounding the brain and spinal cord, specifically caused by the bacterium Listeria monocytogenes. It signifies a severe central nervous system infection with potentially serious neurological complications.

Assign this code when documentation explicitly states a diagnosis of listerial meningitis. This typically occurs in neonates, immunocompromised individuals, or the elderly, and is supported by positive cerebrospinal fluid (CSF) cultures or other definitive laboratory tests identifying Listeria monocytogenes as the causative agent.

• Differentiate from other forms of bacterial meningitis; the causative organism must be Listeria.
• Consider additional codes for any associated neurological sequelae or complications.
• Ensure documentation clearly specifies "meningitis" and not just a generalized listerial infection.