Inflammatory diseases of the central nervous system (G00-G09)

ICD-10 codes G00-G09 cover inflammatory diseases of the central nervous system, mainly involving various types of meningitis, encephalitis, myelitis, abscesses, and their complications. These codes specifically identify infections caused by bacteria, viruses, fungi, parasites, or autoimmune processes affecting the brain, spinal cord, or their coverings.

This range includes detailed codes for bacterial meningitis such as G00.0 for Haemophilus influenzae meningitis and G00.1-G00.3 for pneumococcal, streptococcal, and staphylococcal meningitis. Other codes like G02 describe meningitis from parasitic or fungal infections, while G03 covers nonpyogenic and chronic meningitis. Encephalitis and related inflammation, including acute disseminated encephalomyelitis (ADEM) and tropical spastic paraplegia, are classified under G04. Codes G06-G07 identify intracranial and intraspinal abscesses or granulomas due to various infections. Additionally, G08 focuses on intracranial venous thrombophlebitis, and G09 notes sequelae following these inflammatory CNS disorders such as hydrocephalus or postinfectious complications. This classification aids precise coding for infectious and inflammatory central nervous system conditions, incorporating synonyms to clarify diagnoses from common terms like aseptic meningitis, fungal meningitis, or autoimmune encephalitis.