Delirium 599
in the criteria set. The name of the disorder is fo llowed by the course (i.e., acute, persistent), fol-
lowed by the specifier indicating level of psycho motor activity (i.e., hy peractive, hypoactive,
mixed level of activity). Unlike the recording procedures for ICD-10-CM, which combine the
substance/medication withdrawal delirium and su bstance use disorder into a single code, for
ICD-9-CM a separate diagnostic code is given for the substance use disorder. For example, in
the case of acute hyperactive withdrawal delirium  occurring in a man with a severe alcohol use
disorder, the diagnosis is 291.0 alcohol withdrawal  delirium, acute, hyperactive. An additional
diagnosis of 303.90 severe alcohol use disorder is also given.
ICD-10-CM. The name of the substa nce/medication withdrawal delirium begins with
the specific substance (e.g., al cohol) that is presumed to be causing the withdrawal delir-
ium. The diagnostic code is selected from su bstance-specific codes included in the coding
note included in the criteria set. When re cording the name of the disorder, the comorbid
moderate or severe substance use disorder (if any) is listed first, followed by the word
“with,” followed by the substance withdrawal delirium, followed by the course (i.e., acute,
persistent), followed by the specifier indicating  level of psychomotor activity (i.e., hyper-
active, hypoactive, mixed level of activity). Fo r example, in the case of acute hyperactive
withdrawal delirium occurring in a man with a severe alcohol use disorder, the diagnosis
is F10.231 severe alcohol use disorder with alcohol withdrawal delirium, acute, hyperac-