ICD-10 Code F16 – Hallucinogen related disorders (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F16 – Hallucinogen related disorders
What it is
F16 identifies disorders caused by hallucinogen use, including intoxication, harmful use, dependence, or related mental and behavioral effects. Use it when the record links the clinical problem to hallucinogen exposure.
Clinical signs
Clinical features vary; refer to documentation. Commonly documented findings include perceptual disturbance, altered judgment, anxiety, agitation, or other behavioral changes after hallucinogen use.
When to use this code
Use F16 when the provider documents a hallucinogen-related disorder as the diagnosis, not just a history of use. It is appropriate when symptoms, intoxication, or a substance-induced condition are attributed to hallucinogens. Check documentation for the specific substance and clinical presentation.
Do not use for
Do not use this code for non-hallucinogen substance disorders or for uncomplicated history of use without a current disorder. If the record does not clearly connect the condition to hallucinogen use, check documentation.
Coding tip
Code the most specific hallucinogen-related diagnosis documented, and add the substance-specific code only when the record supports it.