ICD-10 Code F18.259 – Inhalant dependence with inhalant-induced psychotic disorder, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F18.259 – Inhalant dependence with inhalant-induced psychotic disorder, unspecified
What it is
Use this code for a documented inhalant use disorder with dependence, plus a psychotic disorder caused by inhalant use. The psychotic disorder is not further specified in the record.
Clinical signs
Typical findings include dependence on inhalants and psychotic symptoms such as hallucinations, delusions, or disorganized thinking related to substance use. Clinical features vary; refer to documentation.
When to use this code
Assign this code when the provider clearly documents inhalant dependence and an inhalant-induced psychotic disorder, but does not name a more specific psychotic subtype. Use it for records linking the psychosis to inhalant use, not to another cause.
If the note only mentions inhalant abuse, intoxication, or withdrawal without dependence and psychosis, this code is not appropriate. Check documentation for the exact substance-related diagnosis and whether the psychotic disorder is specified.
Do not use for
Do not use for inhalant use without dependence or without a substance-induced psychotic disorder. Do not use if the psychosis is unrelated to inhalant use or if another substance is the documented cause.
Coding tip
Confirm both elements in the chart: inhalant dependence and inhalant-induced psychosis, then code the documented specificity exactly as written.