ICD-10 Code F18.150 – Inhalant abuse with inhalant-induced psychotic disorder with delusions (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F18.150 – Inhalant abuse with inhalant-induced psychotic disorder with delusions
What it is
Use this code for inhalant abuse complicated by a psychotic disorder in which delusions are present. It identifies a substance-related mental disorder rather than simple intoxication or uncomplicated abuse.
Clinical signs
Typical findings include recent inhalant use with psychotic symptoms, especially fixed false beliefs, impaired reality testing, or other substance-induced behavioral changes. Clinical features vary; refer to documentation.
When to use this code
Assign this code when the record clearly documents inhalant abuse and a psychotic disorder caused by inhalant use, with delusions specifically noted. Use it when the provider links the psychosis to inhalants and does not describe a primary psychotic disorder.
If the chart only states inhalant use, intoxication, or abuse without psychosis, this code is not appropriate. Check documentation for the exact substance relationship and whether delusions are part of the diagnosis.
Do not use for
Do not use for uncomplicated inhalant abuse, inhalant intoxication, or psychosis unrelated to inhalants. If the diagnosis is unclear or another substance is responsible, check documentation.
Coding tip
Look for provider wording that ties the delusions directly to inhalant abuse before assigning F18.150.