Delirium 597
Substance withdrawal delirium:  This diagnosis should be made instead of sub-
stance withdrawal when the symptoms in Criteria A and C predominate in the clinical
picture and when they are sufficiently severe to warrant clinical attention.
Code  [specific substance] withdrawal delirium: 291.0 (F10.231)  alcohol; 292.0
(F11.23)  opioid; 292.0 (F13.231)  sedative, hypnotic, or anxiolytic; 292.0 (F19.231)
other (or unknown) substance/medication.
Medication-induced delirium:  This diagnosis applies when the symptoms in Criteria
A and C arise as a side effect of a medication taken as prescribed.
Coding note:  The ICD-9-CM code for [specific medication]-induced delirium is
292.81. The ICD-10-CM code depends on the type of medication. If the medication
is an opioid taken as prescribed, the code is F11.921.  If the medication is a seda-
tive, hypnotic, or anxiolytic taken as prescribed, the code is F13.921.  If the medica-
tion is an amphetamine-type or other stimulant taken as prescribed, the code is
F15.921.  For medications that do not fit into any of the classes (e.g., dexametha-
sone) and in cases in which a substance is judged to be an etiological factor but the
specific class of substance is unknown, the code is F19.921.
293.0 (F05) Delirium due to another medical condition:  There is evidence from the
history, physical examination, or laboratory findings that the disturbance is attributable
to the physiological consequences of another medical condition.