Coding note: The |CD-9-CM code for [specific medication]-induced delirium is 292.81. The |CD-10-CM code depends on the type of medication. If the medication is an opioid taken as prescribed, the code is F11.921. It 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.
Coding note: Include the name of the other medical condition in the name of the delirium (e.g., 293.0 [F05] delirium due to hepatic encephalopathy). The other med- delirium due to another medical condition (e.g.. 572.2 [K7290] hepatic encepha- lopathy; 293.0 [F05] delirium due to hepatic encephalopathy).
293.0 (F05) Delirium due to multiple etiologies: There is evidence from the history, physical examination, or laboratory findings that the delirium has more than one etiol- ogy (e.g., more than one etiological medical condition; another medical condition plus substance intoxication or medication side effect).
Coding note: Use multiple separate codes reﬂecting specific delirium etiologies (e.g.. 572.2 [K7290] hepatic encephalopathy, 293.0 [F05] delirium due to hepatic failure; 291.0 [F10.231] alcohol withdrawal delirium). Note that the etiological med- ical condition both appears as a separate code that precedes the delirium code and is substituted into the delirium due to another medical condition rubric.
Specify if:
Acute: Lasting a few hours or days.
Persistent: Lasting weeks or months.
Specify if:
Hyperactive: The individual has a hyperactive level of psychomotor activity that may be accompanied by mood lability, agitation, and/or refusal to cooperate with medical care.
Hypoactive: The individual has a hypoactive level of psychomotor activity that may be accompanied by sluggishness and lethargy that approaches stupor.
Mixed level of activity: The individual has a normal level of psychomotor activity even though attention and awareness are disturbed. Also includes individuals whose activity level rapidly ﬂuctuates.
ICD-9-CM. The name of the substance/medication intoxication delirium begins with the specific substance (e.g., cocaine, dexamethasone) that is presumed to be causing the delirium. The diagnostic code is selected from the table included in the criteria set, which is based on the drug class. For substances that do not fit into any of the classes (e.g., dexa- methasone), the code for "other substance" should be used; and in cases in which a sub- stance is judged to be an etiological factor but the specific class of substance is unknown, the category "unknown substance” should be used.