528 Substance-Related and Addictive Disorders
3. Numbness or diminished responsiveness to pain.
4. Ataxia.
5. Dysarthria.
6. Muscle rigidity.
7. Seizures or coma.
8. Hyperacusis.
D. The signs or symptoms are not attributable to another medical condition and are not better
explained by another mental disorder, including intoxication with another substance.
Coding note:  The ICD-9-CM code is 292.89.  The ICD-10-CM code depends on whether
there is a comorbid phencyclidine use disorder. If a mild phencyclidine use disorder is co-
morbid, the ICD-10-CM code is F16.129,  and if a moderate or severe phencyclidine use
disorder is comorbid, the ICD-10-CM code is F16.229.  If there is no comorbid phencycli-
dine use disorder, then the ICD-10-CM code is F16.929.
Note:  In addition to the section “Functional Co nsequences of Phencyclidine Intoxication,”
see the corresponding section in phencyclidine use disorder.
Diagnostic Features
Phencyclidine intoxication reflects the clinica lly significant behavioral changes that occur
shortly after ingestion of this substance (or a pharmacologically similar substance). The
most common clinical presentations of phencyclidine intoxication include disorientation,
confusion without hallucinations, hallucination s or delusions, a catatonic-like syndrome,
and coma of varying severity. The intoxication typically last s for several hours but, de-
pending on the type of clinic al presentation and whether other drugs besides phencycli-
dine were consumed, may last for several days or longer.
Prevalence