ICD-10 Code F19.959 – Other Psychoactive Substance Use, Unspecified with Psychoactive Substance-Induced Psychotic Disorder, Unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F19.959 – Other psychoactive substance use, unspecified with psychoactive substance-induced psychotic disorder, unspecified
What it is
This code identifies an unspecified psychoactive substance use disorder with a substance-induced psychotic disorder. Use it when the record links psychosis to a psychoactive substance but does not name the substance or further specify the psychotic features.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include hallucinations, delusions, disorganized thinking, or marked behavioral disturbance occurring in the setting of substance use or withdrawal.
When to use this code
Use this code when the provider documents psychosis caused by an unspecified psychoactive substance and does not identify the drug category. It also fits cases where the substance-related psychotic disorder is recorded, but the psychosis type remains unspecified. Check documentation for the causal substance and any more specific diagnosis before assigning this code.
Do not use for
Do not use this code if the psychosis is due to a known substance and a more specific code is available. Do not use it for primary psychotic disorders without substance involvement.
Coding tip
Query the provider when the substance or psychotic presentation is unclear, because specificity may change the final code.