Reactive confusion

This code represents a transient state of mental disorientation and impaired cognitive function that arises in response to an identifiable stressor or medical condition. It is characterized by acute onset, fluctuating course, and disturbances in attention, memory, and perception, but is not due to a primary psychiatric disorder or chronic neurodegenerative process.

Use this code when documentation indicates an acute confusional state directly attributable to an underlying medical illness, medication side effect, surgery, or significant physiological stressor. Examples include postoperative confusion, delirium secondary to infection, or confusion related to metabolic imbalances. Ensure the medical record clearly identifies the precipitating factor.

• Differentiate from delirium (293.0) which is typically more severe and persistent, or dementia (290.xx) which is chronic and progressive.
• Always code the underlying cause of the reactive confusion first, as this code is typically a manifestation code.
• Ensure documentation specifies "reactive" or "acute" confusion and links it to a specific medical condition or event.