ICD-10 Code F16.283 – Hallucinogen dependence with hallucinogen persisting perception disorder (flashbacks) (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F16.283 – Hallucinogen dependence with hallucinogen persisting perception disorder (flashbacks)
What it is
Use this code for a documented hallucinogen dependence diagnosis when the patient also has hallucinogen persisting perception disorder, often called flashbacks. It identifies ongoing substance dependence with persistent perception changes after hallucinogen use.
Clinical signs
Clinical features vary; refer to documentation. Typical findings include recurrent visual disturbances or perceptual changes after hallucinogen use, with evidence of dependence such as compulsive use, tolerance, or difficulty stopping.
When to use this code
Use F16.283 when the record clearly states both hallucinogen dependence and persisting perception disorder in the same patient. It may appear in behavioral health, emergency, or follow-up notes when flashbacks are documented as part of the substance-related disorder.
If the provider documents only hallucinogen use, intoxication, or a history of use without dependence or persisting perception disorder, choose a different code. Check documentation for the specific substance, current status, and any associated complications.
Do not use for
Do not use this code for simple hallucinogen use, abuse, or intoxication without dependence and flashbacks. Do not assume persisting perception disorder unless the provider documents it.
Coding tip
Code both elements only when the chart explicitly supports dependence and hallucinogen persisting perception disorder.