phencyclidine use disorder).
ICD-10-CM. The name of the substance/medication-induced psychotic disorder begins
with the specific substance (e.g., cocaine, de xamethasone) that is presumed to be causing
the delusions or hallucinations. The diagnostic code is selected from the table included in
the criteria set, which is based on the drug  class and presence or absence of a comorbid
substance use disorder. For substances that do not fit into an y of the classes (e.g., dexa-
methasone), the code for “other substance” with no comorbid substance use should be
used; and in cases in which a substance is judged  to be an etiological factor but the specific
class of substance is unknown, the category “unknown substance” wi th no comorbid sub-
stance use should be used.
When recording the name of the disorder, th e comorbid substance use disorder (if any)
is listed first, followed by the word “with,” followed by the name of the substance-induced
psychotic disorder, followed by  the specification of onset (i .e., onset during intoxication,
onset during withdrawal). For example, in the case of delusions occurring during intoxi-
cation in a man with a severe cocaine use d isorder, the diagnosis is F14.259 severe cocaine
use disorder with cocaine-induced psychotic disorder, with onset during intoxication. A
separate diagnosis of the comorbid severe co caine use disorder is not given. If the sub-
stance-induced psychotic disorder occurs without a comorbid substance use disorder
(e.g., after a one-time heavy use of the substance), no accompanying substance use disor-
der is noted (e.g., F16.959 phencyclidine-induce d psychotic disorder, with onset during in-