Acute disseminated demyelination, unspecified

This code describes an acute inflammatory demyelinating disorder affecting the central nervous system, characterized by widespread inflammation and damage to the myelin sheath. It typically presents as a monophasic event following an infection or vaccination, leading to neurological deficits.

Assign this code when documentation specifies acute disseminated demyelination without further detail regarding the specific type or cause. This diagnosis is often made based on clinical presentation, MRI findings showing multifocal demyelinating lesions, and exclusion of other conditions.

• Do not use this code if a more specific type of acute disseminated demyelination (e.g., post-infectious, post-vaccination) is documented.
• Consider sequencing this code as the primary diagnosis if it is the reason for the encounter.
• Ensure documentation clearly states "acute disseminated demyelination" and lacks further specificity.