G00-G09: Inflammatory diseases of the central nervous system

G03: Meningitis due to other and unspecified causes

Meningitis due to other and unspecified causes describes a group of conditions characterized by inflammation of the protective layers surrounding the brain and spinal cord, called the meninges. This inflammation is often the result of infections that can be caused by a wide range of organisms, including bacteria, viruses, or fungi, but can also be a consequence of non-infectious causes such as certain medications, autoimmune disorders, or tumors. Contagion usually happens through close contact with an infected person, but other triggers may not be infectious. Typical symptoms include severe headache, fever, and neck stiffness, and the disease progresses rapidly, often within hours to a couple of days. Meningitis primarily affects the central nervous system but can cause serious, lasting complications if not promptly addressed, including hearing loss, learning disabilities, and impaired function of other organs or systems.