For more information, see Delirium
A. Disturbance of consciousness (i.e., reduced clarity of awareness of the environment) with reduced ability to focus, sustain, or shift attention.
B. A change in cognition (such as memory deficit, disorientation, language disturbance) or the development of a perceptual disturbance that is not better accounted for by a preexisting, established, or evolving dementia.
C. The disturbance develops over a short period of time (usually hours to days) and tends to fluctuate during the course of the day.
D. There is evidence from the history, physical examination, or laboratory findings that the delirium has more than one etiology (e.g., more than one etiological general medical condition, a general medical condition plus Substance Intoication or medication side effect).
Note: Record each specific etiology, e.g., Delirium Due to Viral Encephalitis; Alcohol Withdrawal Delirium.
Delirium Due to Multiple Etiologies should not be recorded as a diagnosis. For example, to record a delirium due to both hepatic encephalopathy and withdrawal from alcohol, the clinician would list both Delirium Due to Hepatic Encephalopathy and Alcohol Withdrawal Delirium.