Encephalitis and encephalomyelitis, unspecified

This code represents inflammation of the brain and/or spinal cord when the specific cause or type is not documented. It indicates a generalized inflammatory process affecting the central nervous system without further etiological or anatomical detail.

Use this code when the medical record clearly states "encephalitis" or "encephalomyelitis" but lacks information regarding the infectious agent, autoimmune cause, or specific anatomical site (e.g., brainstem, cerebellum). This code is appropriate when the provider has not specified the underlying etiology.

• Avoid using this code if a more specific code for the type or cause of encephalitis/encephalomyelitis is available and documented.
• Query the provider for clarification on the etiology (e.g., viral, bacterial, autoimmune) or specific anatomical involvement if possible.
• Do not use for meningitis alone; refer to codes in G03.- for unspecified meningitis.